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ARM:

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* Clean up vCPU targets, always returning generic v8 as the preferred target
 
 * Trap forwarding infrastructure for nested virtualization (used for traps
   that are taken from an L2 guest and are needed by the L1 hypervisor)
 
 * FEAT_TLBIRANGE support to only invalidate specific ranges of addresses
   when collapsing a table PTE to a block PTE.  This avoids that the guest
   refills the TLBs again for addresses that aren't covered by the table PTE.
 
 * Fix vPMU issues related to handling of PMUver.
 
 * Don't unnecessary align non-stack allocations in the EL2 VA space
 
 * Drop HCR_VIRT_EXCP_MASK, which was never used...
 
 * Don't use smp_processor_id() in kvm_arch_vcpu_load(),
   but the cpu parameter instead
 
 * Drop redundant call to kvm_set_pfn_accessed() in user_mem_abort()
 
 * Remove prototypes without implementations
 
 RISC-V:
 
 * Zba, Zbs, Zicntr, Zicsr, Zifencei, and Zihpm support for guest
 
 * Added ONE_REG interface for SATP mode
 
 * Added ONE_REG interface to enable/disable multiple ISA extensions
 
 * Improved error codes returned by ONE_REG interfaces
 
 * Added KVM_GET_REG_LIST ioctl() implementation for KVM RISC-V
 
 * Added get-reg-list selftest for KVM RISC-V
 
 s390:
 
 * PV crypto passthrough enablement (Tony, Steffen, Viktor, Janosch)
   Allows a PV guest to use crypto cards. Card access is governed by
   the firmware and once a crypto queue is "bound" to a PV VM every
   other entity (PV or not) looses access until it is not bound
   anymore. Enablement is done via flags when creating the PV VM.
 
 * Guest debug fixes (Ilya)
 
 x86:
 
 * Clean up KVM's handling of Intel architectural events
 
 * Intel bugfixes
 
 * Add support for SEV-ES DebugSwap, allowing SEV-ES guests to use debug
   registers and generate/handle #DBs
 
 * Clean up LBR virtualization code
 
 * Fix a bug where KVM fails to set the target pCPU during an IRTE update
 
 * Fix fatal bugs in SEV-ES intrahost migration
 
 * Fix a bug where the recent (architecturally correct) change to reinject
   #BP and skip INT3 broke SEV guests (can't decode INT3 to skip it)
 
 * Retry APIC map recalculation if a vCPU is added/enabled
 
 * Overhaul emergency reboot code to bring SVM up to par with VMX, tie the
   "emergency disabling" behavior to KVM actually being loaded, and move all of
   the logic within KVM
 
 * Fix user triggerable WARNs in SVM where KVM incorrectly assumes the TSC
   ratio MSR cannot diverge from the default when TSC scaling is disabled
   up related code
 
 * Add a framework to allow "caching" feature flags so that KVM can check if
   the guest can use a feature without needing to search guest CPUID
 
 * Rip out the ancient MMU_DEBUG crud and replace the useful bits with
   CONFIG_KVM_PROVE_MMU
 
 * Fix KVM's handling of !visible guest roots to avoid premature triple fault
   injection
 
 * Overhaul KVM's page-track APIs, and KVMGT's usage, to reduce the API surface
   that is needed by external users (currently only KVMGT), and fix a variety
   of issues in the process
 
 This last item had a silly one-character bug in the topic branch that
 was sent to me.  Because it caused pretty bad selftest failures in
 some configurations, I decided to squash in the fix.  So, while the
 exact commit ids haven't been in linux-next, the code has (from the
 kvm-x86 tree).
 
 Generic:
 
 * Wrap kvm_{gfn,hva}_range.pte in a union to allow mmu_notifier events to pass
   action specific data without needing to constantly update the main handlers.
 
 * Drop unused function declarations
 
 Selftests:
 
 * Add testcases to x86's sync_regs_test for detecting KVM TOCTOU bugs
 
 * Add support for printf() in guest code and covert all guest asserts to use
   printf-based reporting
 
 * Clean up the PMU event filter test and add new testcases
 
 * Include x86 selftests in the KVM x86 MAINTAINERS entry
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Paolo Bonzini:
 "ARM:

   - Clean up vCPU targets, always returning generic v8 as the preferred
     target

   - Trap forwarding infrastructure for nested virtualization (used for
     traps that are taken from an L2 guest and are needed by the L1
     hypervisor)

   - FEAT_TLBIRANGE support to only invalidate specific ranges of
     addresses when collapsing a table PTE to a block PTE. This avoids
     that the guest refills the TLBs again for addresses that aren't
     covered by the table PTE.

   - Fix vPMU issues related to handling of PMUver.

   - Don't unnecessary align non-stack allocations in the EL2 VA space

   - Drop HCR_VIRT_EXCP_MASK, which was never used...

   - Don't use smp_processor_id() in kvm_arch_vcpu_load(), but the cpu
     parameter instead

   - Drop redundant call to kvm_set_pfn_accessed() in user_mem_abort()

   - Remove prototypes without implementations

  RISC-V:

   - Zba, Zbs, Zicntr, Zicsr, Zifencei, and Zihpm support for guest

   - Added ONE_REG interface for SATP mode

   - Added ONE_REG interface to enable/disable multiple ISA extensions

   - Improved error codes returned by ONE_REG interfaces

   - Added KVM_GET_REG_LIST ioctl() implementation for KVM RISC-V

   - Added get-reg-list selftest for KVM RISC-V

  s390:

   - PV crypto passthrough enablement (Tony, Steffen, Viktor, Janosch)

     Allows a PV guest to use crypto cards. Card access is governed by
     the firmware and once a crypto queue is "bound" to a PV VM every
     other entity (PV or not) looses access until it is not bound
     anymore. Enablement is done via flags when creating the PV VM.

   - Guest debug fixes (Ilya)

  x86:

   - Clean up KVM's handling of Intel architectural events

   - Intel bugfixes

   - Add support for SEV-ES DebugSwap, allowing SEV-ES guests to use
     debug registers and generate/handle #DBs

   - Clean up LBR virtualization code

   - Fix a bug where KVM fails to set the target pCPU during an IRTE
     update

   - Fix fatal bugs in SEV-ES intrahost migration

   - Fix a bug where the recent (architecturally correct) change to
     reinject #BP and skip INT3 broke SEV guests (can't decode INT3 to
     skip it)

   - Retry APIC map recalculation if a vCPU is added/enabled

   - Overhaul emergency reboot code to bring SVM up to par with VMX, tie
     the "emergency disabling" behavior to KVM actually being loaded,
     and move all of the logic within KVM

   - Fix user triggerable WARNs in SVM where KVM incorrectly assumes the
     TSC ratio MSR cannot diverge from the default when TSC scaling is
     disabled up related code

   - Add a framework to allow "caching" feature flags so that KVM can
     check if the guest can use a feature without needing to search
     guest CPUID

   - Rip out the ancient MMU_DEBUG crud and replace the useful bits with
     CONFIG_KVM_PROVE_MMU

   - Fix KVM's handling of !visible guest roots to avoid premature
     triple fault injection

   - Overhaul KVM's page-track APIs, and KVMGT's usage, to reduce the
     API surface that is needed by external users (currently only
     KVMGT), and fix a variety of issues in the process

  Generic:

   - Wrap kvm_{gfn,hva}_range.pte in a union to allow mmu_notifier
     events to pass action specific data without needing to constantly
     update the main handlers.

   - Drop unused function declarations

  Selftests:

   - Add testcases to x86's sync_regs_test for detecting KVM TOCTOU bugs

   - Add support for printf() in guest code and covert all guest asserts
     to use printf-based reporting

   - Clean up the PMU event filter test and add new testcases

   - Include x86 selftests in the KVM x86 MAINTAINERS entry"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (279 commits)
  KVM: x86/mmu: Include mmu.h in spte.h
  KVM: x86/mmu: Use dummy root, backed by zero page, for !visible guest roots
  KVM: x86/mmu: Disallow guest from using !visible slots for page tables
  KVM: x86/mmu: Harden TDP MMU iteration against root w/o shadow page
  KVM: x86/mmu: Harden new PGD against roots without shadow pages
  KVM: x86/mmu: Add helper to convert root hpa to shadow page
  drm/i915/gvt: Drop final dependencies on KVM internal details
  KVM: x86/mmu: Handle KVM bookkeeping in page-track APIs, not callers
  KVM: x86/mmu: Drop @slot param from exported/external page-track APIs
  KVM: x86/mmu: Bug the VM if write-tracking is used but not enabled
  KVM: x86/mmu: Assert that correct locks are held for page write-tracking
  KVM: x86/mmu: Rename page-track APIs to reflect the new reality
  KVM: x86/mmu: Drop infrastructure for multiple page-track modes
  KVM: x86/mmu: Use page-track notifiers iff there are external users
  KVM: x86/mmu: Move KVM-only page-track declarations to internal header
  KVM: x86: Remove the unused page-track hook track_flush_slot()
  drm/i915/gvt: switch from ->track_flush_slot() to ->track_remove_region()
  KVM: x86: Add a new page-track hook to handle memslot deletion
  drm/i915/gvt: Don't bother removing write-protection on to-be-deleted slot
  KVM: x86: Reject memslot MOVE operations if KVMGT is attached
  ...
This commit is contained in:
Linus Torvalds 2023-09-07 13:52:20 -07:00
commit 0c02183427
177 changed files with 8700 additions and 3154 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Documentation/virt/kvm/api.rst
View File

@ -2259,6 +2259,8 @@ Errors:
EINVAL invalid register ID, or no such register or used with VMs in
protected virtualization mode on s390
EPERM (arm64) register access not allowed before vcpu finalization
EBUSY (riscv) changing register value not allowed after the vcpu
has run at least once
====== ============================================================
(These error codes are indicative only: do not rely on a specific error
@ -3499,7 +3501,7 @@ VCPU matching underlying host.
---------------------
:Capability: basic
:Architectures: arm64, mips
:Architectures: arm64, mips, riscv
:Type: vcpu ioctl
:Parameters: struct kvm_reg_list (in/out)
:Returns: 0 on success; -1 on error

2
MAINTAINERS
View File

@ -11589,6 +11589,8 @@ F: arch/x86/include/uapi/asm/svm.h
F: arch/x86/include/uapi/asm/vmx.h
F: arch/x86/kvm/
F: arch/x86/kvm/*/
F: tools/testing/selftests/kvm/*/x86_64/
F: tools/testing/selftests/kvm/x86_64/
KERNFS
M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2
arch/arm/include/asm/arm_pmuv3.h
View File

@ -227,6 +227,8 @@ static inline bool kvm_set_pmuserenr(u64 val)
return false;
}
static inline void kvm_vcpu_pmu_resync_el0(void) {}
/* PMU Version in DFR Register */
#define ARMV8_PMU_DFR_VER_NI 0
#define ARMV8_PMU_DFR_VER_V3P4 0x5

51
arch/arm64/include/asm/kvm_arm.h
View File

@ -18,10 +18,19 @@
#define HCR_DCT (UL(1) << 57)
#define HCR_ATA_SHIFT 56
#define HCR_ATA (UL(1) << HCR_ATA_SHIFT)
#define HCR_TTLBOS (UL(1) << 55)
#define HCR_TTLBIS (UL(1) << 54)
#define HCR_ENSCXT (UL(1) << 53)
#define HCR_TOCU (UL(1) << 52)
#define HCR_AMVOFFEN (UL(1) << 51)
#define HCR_TICAB (UL(1) << 50)
#define HCR_TID4 (UL(1) << 49)
#define HCR_FIEN (UL(1) << 47)
#define HCR_FWB (UL(1) << 46)
#define HCR_NV2 (UL(1) << 45)
#define HCR_AT (UL(1) << 44)
#define HCR_NV1 (UL(1) << 43)
#define HCR_NV (UL(1) << 42)
#define HCR_API (UL(1) << 41)
#define HCR_APK (UL(1) << 40)
#define HCR_TEA (UL(1) << 37)
@ -89,7 +98,6 @@
HCR_BSU_IS | HCR_FB | HCR_TACR | \
HCR_AMO | HCR_SWIO | HCR_TIDCP | HCR_RW | HCR_TLOR | \
HCR_FMO | HCR_IMO | HCR_PTW | HCR_TID3)
#define HCR_VIRT_EXCP_MASK (HCR_VSE | HCR_VI | HCR_VF)
#define HCR_HOST_NVHE_FLAGS (HCR_RW | HCR_API | HCR_APK | HCR_ATA)
#define HCR_HOST_NVHE_PROTECTED_FLAGS (HCR_HOST_NVHE_FLAGS | HCR_TSC)
#define HCR_HOST_VHE_FLAGS (HCR_RW | HCR_TGE | HCR_E2H)
@ -324,6 +332,47 @@
BIT(18) | \
GENMASK(16, 15))
/*
* FGT register definitions
*
* RES0 and polarity masks as of DDI0487J.a, to be updated as needed.
* We're not using the generated masks as they are usually ahead of
* the published ARM ARM, which we use as a reference.
*
* Once we get to a point where the two describe the same thing, we'll
* merge the definitions. One day.
*/
#define __HFGRTR_EL2_RES0 (GENMASK(63, 56) | GENMASK(53, 51))
#define __HFGRTR_EL2_MASK GENMASK(49, 0)
#define __HFGRTR_EL2_nMASK (GENMASK(55, 54) | BIT(50))
#define __HFGWTR_EL2_RES0 (GENMASK(63, 56) | GENMASK(53, 51) | \
BIT(46) | BIT(42) | BIT(40) | BIT(28) | \
GENMASK(26, 25) | BIT(21) | BIT(18) | \
GENMASK(15, 14) | GENMASK(10, 9) | BIT(2))
#define __HFGWTR_EL2_MASK GENMASK(49, 0)
#define __HFGWTR_EL2_nMASK (GENMASK(55, 54) | BIT(50))
#define __HFGITR_EL2_RES0 GENMASK(63, 57)
#define __HFGITR_EL2_MASK GENMASK(54, 0)
#define __HFGITR_EL2_nMASK GENMASK(56, 55)
#define __HDFGRTR_EL2_RES0 (BIT(49) | BIT(42) | GENMASK(39, 38) | \
GENMASK(21, 20) | BIT(8))
#define __HDFGRTR_EL2_MASK ~__HDFGRTR_EL2_nMASK
#define __HDFGRTR_EL2_nMASK GENMASK(62, 59)
#define __HDFGWTR_EL2_RES0 (BIT(63) | GENMASK(59, 58) | BIT(51) | BIT(47) | \
BIT(43) | GENMASK(40, 38) | BIT(34) | BIT(30) | \
BIT(22) | BIT(9) | BIT(6))
#define __HDFGWTR_EL2_MASK ~__HDFGWTR_EL2_nMASK
#define __HDFGWTR_EL2_nMASK GENMASK(62, 60)
/* Similar definitions for HCRX_EL2 */
#define __HCRX_EL2_RES0 (GENMASK(63, 16) | GENMASK(13, 12))
#define __HCRX_EL2_MASK (0)
#define __HCRX_EL2_nMASK (GENMASK(15, 14) | GENMASK(4, 0))
/* Hyp Prefetch Fault Address Register (HPFAR/HDFAR) */
#define HPFAR_MASK (~UL(0xf))
/*

3
arch/arm64/include/asm/kvm_asm.h
View File

@ -70,6 +70,7 @@ enum __kvm_host_smccc_func {
__KVM_HOST_SMCCC_FUNC___kvm_tlb_flush_vmid_ipa,
__KVM_HOST_SMCCC_FUNC___kvm_tlb_flush_vmid_ipa_nsh,
__KVM_HOST_SMCCC_FUNC___kvm_tlb_flush_vmid,
__KVM_HOST_SMCCC_FUNC___kvm_tlb_flush_vmid_range,
__KVM_HOST_SMCCC_FUNC___kvm_flush_cpu_context,
__KVM_HOST_SMCCC_FUNC___kvm_timer_set_cntvoff,
__KVM_HOST_SMCCC_FUNC___vgic_v3_read_vmcr,
@ -229,6 +230,8 @@ extern void __kvm_tlb_flush_vmid_ipa(struct kvm_s2_mmu *mmu, phys_addr_t ipa,
extern void __kvm_tlb_flush_vmid_ipa_nsh(struct kvm_s2_mmu *mmu,
phys_addr_t ipa,
int level);
extern void __kvm_tlb_flush_vmid_range(struct kvm_s2_mmu *mmu,
phys_addr_t start, unsigned long pages);
extern void __kvm_tlb_flush_vmid(struct kvm_s2_mmu *mmu);
extern void __kvm_timer_set_cntvoff(u64 cntvoff);

24
arch/arm64/include/asm/kvm_host.h
View File

@ -49,6 +49,7 @@
#define KVM_REQ_RELOAD_GICv4 KVM_ARCH_REQ(4)
#define KVM_REQ_RELOAD_PMU KVM_ARCH_REQ(5)
#define KVM_REQ_SUSPEND KVM_ARCH_REQ(6)
#define KVM_REQ_RESYNC_PMU_EL0 KVM_ARCH_REQ(7)
#define KVM_DIRTY_LOG_MANUAL_CAPS (KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE | \
KVM_DIRTY_LOG_INITIALLY_SET)
@ -380,6 +381,7 @@ enum vcpu_sysreg {
CPTR_EL2, /* Architectural Feature Trap Register (EL2) */
HSTR_EL2, /* Hypervisor System Trap Register */
HACR_EL2, /* Hypervisor Auxiliary Control Register */
HCRX_EL2, /* Extended Hypervisor Configuration Register */
TTBR0_EL2, /* Translation Table Base Register 0 (EL2) */
TTBR1_EL2, /* Translation Table Base Register 1 (EL2) */
TCR_EL2, /* Translation Control Register (EL2) */
@ -400,6 +402,11 @@ enum vcpu_sysreg {
TPIDR_EL2, /* EL2 Software Thread ID Register */
CNTHCTL_EL2, /* Counter-timer Hypervisor Control register */
SP_EL2, /* EL2 Stack Pointer */
HFGRTR_EL2,
HFGWTR_EL2,
HFGITR_EL2,
HDFGRTR_EL2,
HDFGWTR_EL2,
CNTHP_CTL_EL2,
CNTHP_CVAL_EL2,
CNTHV_CTL_EL2,
@ -567,8 +574,7 @@ struct kvm_vcpu_arch {
/* Cache some mmu pages needed inside spinlock regions */
struct kvm_mmu_memory_cache mmu_page_cache;
/* Target CPU and feature flags */
int target;
/* feature flags */
DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
/* Virtual SError ESR to restore when HCR_EL2.VSE is set */
@ -669,6 +675,8 @@ struct kvm_vcpu_arch {
#define VCPU_SVE_FINALIZED __vcpu_single_flag(cflags, BIT(1))
/* PTRAUTH exposed to guest */
#define GUEST_HAS_PTRAUTH __vcpu_single_flag(cflags, BIT(2))
/* KVM_ARM_VCPU_INIT completed */
#define VCPU_INITIALIZED __vcpu_single_flag(cflags, BIT(3))
/* Exception pending */
#define PENDING_EXCEPTION __vcpu_single_flag(iflags, BIT(0))
@ -899,7 +907,6 @@ struct kvm_vcpu_stat {
u64 exits;
};
void kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
@ -967,8 +974,6 @@ void kvm_arm_resume_guest(struct kvm *kvm);
#define kvm_call_hyp_nvhe(f, ...) f(__VA_ARGS__)
#endif /* __KVM_NVHE_HYPERVISOR__ */
void force_vm_exit(const cpumask_t *mask);
int handle_exit(struct kvm_vcpu *vcpu, int exception_index);
void handle_exit_early(struct kvm_vcpu *vcpu, int exception_index);
@ -983,6 +988,7 @@ int kvm_handle_cp10_id(struct kvm_vcpu *vcpu);
void kvm_reset_sys_regs(struct kvm_vcpu *vcpu);
int __init kvm_sys_reg_table_init(void);
int __init populate_nv_trap_config(void);
bool lock_all_vcpus(struct kvm *kvm);
void unlock_all_vcpus(struct kvm *kvm);
@ -1049,8 +1055,6 @@ static inline bool kvm_system_needs_idmapped_vectors(void)
return cpus_have_const_cap(ARM64_SPECTRE_V3A);
}
void kvm_arm_vcpu_ptrauth_trap(struct kvm_vcpu *vcpu);
static inline void kvm_arch_sync_events(struct kvm *kvm) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
@ -1113,13 +1117,15 @@ int __init kvm_set_ipa_limit(void);
#define __KVM_HAVE_ARCH_VM_ALLOC
struct kvm *kvm_arch_alloc_vm(void);
#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS
#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS_RANGE
static inline bool kvm_vm_is_protected(struct kvm *kvm)
{
return false;
}
void kvm_init_protected_traps(struct kvm_vcpu *vcpu);
int kvm_arm_vcpu_finalize(struct kvm_vcpu *vcpu, int feature);
bool kvm_arm_vcpu_is_finalized(struct kvm_vcpu *vcpu);

1
arch/arm64/include/asm/kvm_mmu.h
View File

@ -168,6 +168,7 @@ int create_hyp_io_mappings(phys_addr_t phys_addr, size_t size,
void __iomem **haddr);
int create_hyp_exec_mappings(phys_addr_t phys_addr, size_t size,
void **haddr);
int create_hyp_stack(phys_addr_t phys_addr, unsigned long *haddr);
void __init free_hyp_pgds(void);
void stage2_unmap_vm(struct kvm *kvm);

2
arch/arm64/include/asm/kvm_nested.h
View File

@ -11,6 +11,8 @@ static inline bool vcpu_has_nv(const struct kvm_vcpu *vcpu)
test_bit(KVM_ARM_VCPU_HAS_EL2, vcpu->arch.features));
}
extern bool __check_nv_sr_forward(struct kvm_vcpu *vcpu);
struct sys_reg_params;
struct sys_reg_desc;

10
arch/arm64/include/asm/kvm_pgtable.h
View File

@ -746,4 +746,14 @@ enum kvm_pgtable_prot kvm_pgtable_stage2_pte_prot(kvm_pte_t pte);
* kvm_pgtable_prot format.
*/
enum kvm_pgtable_prot kvm_pgtable_hyp_pte_prot(kvm_pte_t pte);
/**
* kvm_tlb_flush_vmid_range() - Invalidate/flush a range of TLB entries
*
* @mmu: Stage-2 KVM MMU struct
* @addr: The base Intermediate physical address from which to invalidate
* @size: Size of the range from the base to invalidate
*/
void kvm_tlb_flush_vmid_range(struct kvm_s2_mmu *mmu,
phys_addr_t addr, size_t size);
#endif /* __ARM64_KVM_PGTABLE_H__ */

268
arch/arm64/include/asm/sysreg.h
View File

@ -124,6 +124,37 @@
#define SYS_DC_CIGSW sys_insn(1, 0, 7, 14, 4)
#define SYS_DC_CIGDSW sys_insn(1, 0, 7, 14, 6)
#define SYS_IC_IALLUIS sys_insn(1, 0, 7, 1, 0)
#define SYS_IC_IALLU sys_insn(1, 0, 7, 5, 0)
#define SYS_IC_IVAU sys_insn(1, 3, 7, 5, 1)
#define SYS_DC_IVAC sys_insn(1, 0, 7, 6, 1)
#define SYS_DC_IGVAC sys_insn(1, 0, 7, 6, 3)
#define SYS_DC_IGDVAC sys_insn(1, 0, 7, 6, 5)
#define SYS_DC_CVAC sys_insn(1, 3, 7, 10, 1)
#define SYS_DC_CGVAC sys_insn(1, 3, 7, 10, 3)
#define SYS_DC_CGDVAC sys_insn(1, 3, 7, 10, 5)
#define SYS_DC_CVAU sys_insn(1, 3, 7, 11, 1)
#define SYS_DC_CVAP sys_insn(1, 3, 7, 12, 1)
#define SYS_DC_CGVAP sys_insn(1, 3, 7, 12, 3)
#define SYS_DC_CGDVAP sys_insn(1, 3, 7, 12, 5)
#define SYS_DC_CVADP sys_insn(1, 3, 7, 13, 1)
#define SYS_DC_CGVADP sys_insn(1, 3, 7, 13, 3)
#define SYS_DC_CGDVADP sys_insn(1, 3, 7, 13, 5)
#define SYS_DC_CIVAC sys_insn(1, 3, 7, 14, 1)
#define SYS_DC_CIGVAC sys_insn(1, 3, 7, 14, 3)
#define SYS_DC_CIGDVAC sys_insn(1, 3, 7, 14, 5)
/* Data cache zero operations */
#define SYS_DC_ZVA sys_insn(1, 3, 7, 4, 1)
#define SYS_DC_GVA sys_insn(1, 3, 7, 4, 3)
#define SYS_DC_GZVA sys_insn(1, 3, 7, 4, 4)
/*
* Automatically generated definitions for system registers, the
* manual encodings below are in the process of being converted to
@ -163,6 +194,82 @@
#define SYS_DBGDTRTX_EL0 sys_reg(2, 3, 0, 5, 0)
#define SYS_DBGVCR32_EL2 sys_reg(2, 4, 0, 7, 0)
#define SYS_BRBINF_EL1(n) sys_reg(2, 1, 8, (n & 15), (((n & 16) >> 2) | 0))
#define SYS_BRBINFINJ_EL1 sys_reg(2, 1, 9, 1, 0)
#define SYS_BRBSRC_EL1(n) sys_reg(2, 1, 8, (n & 15), (((n & 16) >> 2) | 1))
#define SYS_BRBSRCINJ_EL1 sys_reg(2, 1, 9, 1, 1)
#define SYS_BRBTGT_EL1(n) sys_reg(2, 1, 8, (n & 15), (((n & 16) >> 2) | 2))
#define SYS_BRBTGTINJ_EL1 sys_reg(2, 1, 9, 1, 2)
#define SYS_BRBTS_EL1 sys_reg(2, 1, 9, 0, 2)
#define SYS_BRBCR_EL1 sys_reg(2, 1, 9, 0, 0)
#define SYS_BRBFCR_EL1 sys_reg(2, 1, 9, 0, 1)
#define SYS_BRBIDR0_EL1 sys_reg(2, 1, 9, 2, 0)
#define SYS_TRCITECR_EL1 sys_reg(3, 0, 1, 2, 3)
#define SYS_TRCACATR(m) sys_reg(2, 1, 2, ((m & 7) << 1), (2 | (m >> 3)))
#define SYS_TRCACVR(m) sys_reg(2, 1, 2, ((m & 7) << 1), (0 | (m >> 3)))
#define SYS_TRCAUTHSTATUS sys_reg(2, 1, 7, 14, 6)
#define SYS_TRCAUXCTLR sys_reg(2, 1, 0, 6, 0)
#define SYS_TRCBBCTLR sys_reg(2, 1, 0, 15, 0)
#define SYS_TRCCCCTLR sys_reg(2, 1, 0, 14, 0)
#define SYS_TRCCIDCCTLR0 sys_reg(2, 1, 3, 0, 2)
#define SYS_TRCCIDCCTLR1 sys_reg(2, 1, 3, 1, 2)
#define SYS_TRCCIDCVR(m) sys_reg(2, 1, 3, ((m & 7) << 1), 0)
#define SYS_TRCCLAIMCLR sys_reg(2, 1, 7, 9, 6)
#define SYS_TRCCLAIMSET sys_reg(2, 1, 7, 8, 6)
#define SYS_TRCCNTCTLR(m) sys_reg(2, 1, 0, (4 | (m & 3)), 5)
#define SYS_TRCCNTRLDVR(m) sys_reg(2, 1, 0, (0 | (m & 3)), 5)
#define SYS_TRCCNTVR(m) sys_reg(2, 1, 0, (8 | (m & 3)), 5)
#define SYS_TRCCONFIGR sys_reg(2, 1, 0, 4, 0)
#define SYS_TRCDEVARCH sys_reg(2, 1, 7, 15, 6)
#define SYS_TRCDEVID sys_reg(2, 1, 7, 2, 7)
#define SYS_TRCEVENTCTL0R sys_reg(2, 1, 0, 8, 0)
#define SYS_TRCEVENTCTL1R sys_reg(2, 1, 0, 9, 0)
#define SYS_TRCEXTINSELR(m) sys_reg(2, 1, 0, (8 | (m & 3)), 4)
#define SYS_TRCIDR0 sys_reg(2, 1, 0, 8, 7)
#define SYS_TRCIDR10 sys_reg(2, 1, 0, 2, 6)
#define SYS_TRCIDR11 sys_reg(2, 1, 0, 3, 6)
#define SYS_TRCIDR12 sys_reg(2, 1, 0, 4, 6)
#define SYS_TRCIDR13 sys_reg(2, 1, 0, 5, 6)
#define SYS_TRCIDR1 sys_reg(2, 1, 0, 9, 7)
#define SYS_TRCIDR2 sys_reg(2, 1, 0, 10, 7)
#define SYS_TRCIDR3 sys_reg(2, 1, 0, 11, 7)
#define SYS_TRCIDR4 sys_reg(2, 1, 0, 12, 7)
#define SYS_TRCIDR5 sys_reg(2, 1, 0, 13, 7)
#define SYS_TRCIDR6 sys_reg(2, 1, 0, 14, 7)
#define SYS_TRCIDR7 sys_reg(2, 1, 0, 15, 7)
#define SYS_TRCIDR8 sys_reg(2, 1, 0, 0, 6)
#define SYS_TRCIDR9 sys_reg(2, 1, 0, 1, 6)
#define SYS_TRCIMSPEC(m) sys_reg(2, 1, 0, (m & 7), 7)
#define SYS_TRCITEEDCR sys_reg(2, 1, 0, 2, 1)
#define SYS_TRCOSLSR sys_reg(2, 1, 1, 1, 4)
#define SYS_TRCPRGCTLR sys_reg(2, 1, 0, 1, 0)
#define SYS_TRCQCTLR sys_reg(2, 1, 0, 1, 1)
#define SYS_TRCRSCTLR(m) sys_reg(2, 1, 1, (m & 15), (0 | (m >> 4)))
#define SYS_TRCRSR sys_reg(2, 1, 0, 10, 0)
#define SYS_TRCSEQEVR(m) sys_reg(2, 1, 0, (m & 3), 4)
#define SYS_TRCSEQRSTEVR sys_reg(2, 1, 0, 6, 4)
#define SYS_TRCSEQSTR sys_reg(2, 1, 0, 7, 4)
#define SYS_TRCSSCCR(m) sys_reg(2, 1, 1, (m & 7), 2)
#define SYS_TRCSSCSR(m) sys_reg(2, 1, 1, (8 | (m & 7)), 2)
#define SYS_TRCSSPCICR(m) sys_reg(2, 1, 1, (m & 7), 3)
#define SYS_TRCSTALLCTLR sys_reg(2, 1, 0, 11, 0)
#define SYS_TRCSTATR sys_reg(2, 1, 0, 3, 0)
#define SYS_TRCSYNCPR sys_reg(2, 1, 0, 13, 0)
#define SYS_TRCTRACEIDR sys_reg(2, 1, 0, 0, 1)
#define SYS_TRCTSCTLR sys_reg(2, 1, 0, 12, 0)
#define SYS_TRCVICTLR sys_reg(2, 1, 0, 0, 2)
#define SYS_TRCVIIECTLR sys_reg(2, 1, 0, 1, 2)
#define SYS_TRCVIPCSSCTLR sys_reg(2, 1, 0, 3, 2)
#define SYS_TRCVISSCTLR sys_reg(2, 1, 0, 2, 2)
#define SYS_TRCVMIDCCTLR0 sys_reg(2, 1, 3, 2, 2)
#define SYS_TRCVMIDCCTLR1 sys_reg(2, 1, 3, 3, 2)
#define SYS_TRCVMIDCVR(m) sys_reg(2, 1, 3, ((m & 7) << 1), 1)
/* ETM */
#define SYS_TRCOSLAR sys_reg(2, 1, 1, 0, 4)
#define SYS_MIDR_EL1 sys_reg(3, 0, 0, 0, 0)
#define SYS_MPIDR_EL1 sys_reg(3, 0, 0, 0, 5)
#define SYS_REVIDR_EL1 sys_reg(3, 0, 0, 0, 6)
@ -203,8 +310,13 @@
#define SYS_ERXCTLR_EL1 sys_reg(3, 0, 5, 4, 1)
#define SYS_ERXSTATUS_EL1 sys_reg(3, 0, 5, 4, 2)
#define SYS_ERXADDR_EL1 sys_reg(3, 0, 5, 4, 3)
#define SYS_ERXPFGF_EL1 sys_reg(3, 0, 5, 4, 4)
#define SYS_ERXPFGCTL_EL1 sys_reg(3, 0, 5, 4, 5)
#define SYS_ERXPFGCDN_EL1 sys_reg(3, 0, 5, 4, 6)
#define SYS_ERXMISC0_EL1 sys_reg(3, 0, 5, 5, 0)
#define SYS_ERXMISC1_EL1 sys_reg(3, 0, 5, 5, 1)
#define SYS_ERXMISC2_EL1 sys_reg(3, 0, 5, 5, 2)
#define SYS_ERXMISC3_EL1 sys_reg(3, 0, 5, 5, 3)
#define SYS_TFSR_EL1 sys_reg(3, 0, 5, 6, 0)
#define SYS_TFSRE0_EL1 sys_reg(3, 0, 5, 6, 1)
@ -275,6 +387,8 @@
#define SYS_ICC_IGRPEN0_EL1 sys_reg(3, 0, 12, 12, 6)
#define SYS_ICC_IGRPEN1_EL1 sys_reg(3, 0, 12, 12, 7)
#define SYS_ACCDATA_EL1 sys_reg(3, 0, 13, 0, 5)
#define SYS_CNTKCTL_EL1 sys_reg(3, 0, 14, 1, 0)
#define SYS_AIDR_EL1 sys_reg(3, 1, 0, 0, 7)
@ -383,8 +497,6 @@
#define SYS_VTCR_EL2 sys_reg(3, 4, 2, 1, 2)
#define SYS_TRFCR_EL2 sys_reg(3, 4, 1, 2, 1)
#define SYS_HDFGRTR_EL2 sys_reg(3, 4, 3, 1, 4)
#define SYS_HDFGWTR_EL2 sys_reg(3, 4, 3, 1, 5)
#define SYS_HAFGRTR_EL2 sys_reg(3, 4, 3, 1, 6)
#define SYS_SPSR_EL2 sys_reg(3, 4, 4, 0, 0)
#define SYS_ELR_EL2 sys_reg(3, 4, 4, 0, 1)
@ -478,6 +590,158 @@
#define SYS_SP_EL2 sys_reg(3, 6, 4, 1, 0)
/* AT instructions */
#define AT_Op0 1
#define AT_CRn 7
#define OP_AT_S1E1R sys_insn(AT_Op0, 0, AT_CRn, 8, 0)
#define OP_AT_S1E1W sys_insn(AT_Op0, 0, AT_CRn, 8, 1)
#define OP_AT_S1E0R sys_insn(AT_Op0, 0, AT_CRn, 8, 2)
#define OP_AT_S1E0W sys_insn(AT_Op0, 0, AT_CRn, 8, 3)
#define OP_AT_S1E1RP sys_insn(AT_Op0, 0, AT_CRn, 9, 0)
#define OP_AT_S1E1WP sys_insn(AT_Op0, 0, AT_CRn, 9, 1)
#define OP_AT_S1E2R sys_insn(AT_Op0, 4, AT_CRn, 8, 0)
#define OP_AT_S1E2W sys_insn(AT_Op0, 4, AT_CRn, 8, 1)
#define OP_AT_S12E1R sys_insn(AT_Op0, 4, AT_CRn, 8, 4)
#define OP_AT_S12E1W sys_insn(AT_Op0, 4, AT_CRn, 8, 5)
#define OP_AT_S12E0R sys_insn(AT_Op0, 4, AT_CRn, 8, 6)
#define OP_AT_S12E0W sys_insn(AT_Op0, 4, AT_CRn, 8, 7)
/* TLBI instructions */
#define OP_TLBI_VMALLE1OS sys_insn(1, 0, 8, 1, 0)
#define OP_TLBI_VAE1OS sys_insn(1, 0, 8, 1, 1)
#define OP_TLBI_ASIDE1OS sys_insn(1, 0, 8, 1, 2)
#define OP_TLBI_VAAE1OS sys_insn(1, 0, 8, 1, 3)
#define OP_TLBI_VALE1OS sys_insn(1, 0, 8, 1, 5)
#define OP_TLBI_VAALE1OS sys_insn(1, 0, 8, 1, 7)
#define OP_TLBI_RVAE1IS sys_insn(1, 0, 8, 2, 1)
#define OP_TLBI_RVAAE1IS sys_insn(1, 0, 8, 2, 3)
#define OP_TLBI_RVALE1IS sys_insn(1, 0, 8, 2, 5)
#define OP_TLBI_RVAALE1IS sys_insn(1, 0, 8, 2, 7)
#define OP_TLBI_VMALLE1IS sys_insn(1, 0, 8, 3, 0)
#define OP_TLBI_VAE1IS sys_insn(1, 0, 8, 3, 1)
#define OP_TLBI_ASIDE1IS sys_insn(1, 0, 8, 3, 2)
#define OP_TLBI_VAAE1IS sys_insn(1, 0, 8, 3, 3)
#define OP_TLBI_VALE1IS sys_insn(1, 0, 8, 3, 5)
#define OP_TLBI_VAALE1IS sys_insn(1, 0, 8, 3, 7)
#define OP_TLBI_RVAE1OS sys_insn(1, 0, 8, 5, 1)
#define OP_TLBI_RVAAE1OS sys_insn(1, 0, 8, 5, 3)
#define OP_TLBI_RVALE1OS sys_insn(1, 0, 8, 5, 5)
#define OP_TLBI_RVAALE1OS sys_insn(1, 0, 8, 5, 7)
#define OP_TLBI_RVAE1 sys_insn(1, 0, 8, 6, 1)
#define OP_TLBI_RVAAE1 sys_insn(1, 0, 8, 6, 3)
#define OP_TLBI_RVALE1 sys_insn(1, 0, 8, 6, 5)
#define OP_TLBI_RVAALE1 sys_insn(1, 0, 8, 6, 7)
#define OP_TLBI_VMALLE1 sys_insn(1, 0, 8, 7, 0)
#define OP_TLBI_VAE1 sys_insn(1, 0, 8, 7, 1)
#define OP_TLBI_ASIDE1 sys_insn(1, 0, 8, 7, 2)
#define OP_TLBI_VAAE1 sys_insn(1, 0, 8, 7, 3)
#define OP_TLBI_VALE1 sys_insn(1, 0, 8, 7, 5)
#define OP_TLBI_VAALE1 sys_insn(1, 0, 8, 7, 7)
#define OP_TLBI_VMALLE1OSNXS sys_insn(1, 0, 9, 1, 0)
#define OP_TLBI_VAE1OSNXS sys_insn(1, 0, 9, 1, 1)
#define OP_TLBI_ASIDE1OSNXS sys_insn(1, 0, 9, 1, 2)
#define OP_TLBI_VAAE1OSNXS sys_insn(1, 0, 9, 1, 3)
#define OP_TLBI_VALE1OSNXS sys_insn(1, 0, 9, 1, 5)
#define OP_TLBI_VAALE1OSNXS sys_insn(1, 0, 9, 1, 7)
#define OP_TLBI_RVAE1ISNXS sys_insn(1, 0, 9, 2, 1)
#define OP_TLBI_RVAAE1ISNXS sys_insn(1, 0, 9, 2, 3)
#define OP_TLBI_RVALE1ISNXS sys_insn(1, 0, 9, 2, 5)
#define OP_TLBI_RVAALE1ISNXS sys_insn(1, 0, 9, 2, 7)
#define OP_TLBI_VMALLE1ISNXS sys_insn(1, 0, 9, 3, 0)
#define OP_TLBI_VAE1ISNXS sys_insn(1, 0, 9, 3, 1)
#define OP_TLBI_ASIDE1ISNXS sys_insn(1, 0, 9, 3, 2)
#define OP_TLBI_VAAE1ISNXS sys_insn(1, 0, 9, 3, 3)
#define OP_TLBI_VALE1ISNXS sys_insn(1, 0, 9, 3, 5)
#define OP_TLBI_VAALE1ISNXS sys_insn(1, 0, 9, 3, 7)
#define OP_TLBI_RVAE1OSNXS sys_insn(1, 0, 9, 5, 1)
#define OP_TLBI_RVAAE1OSNXS sys_insn(1, 0, 9, 5, 3)
#define OP_TLBI_RVALE1OSNXS sys_insn(1, 0, 9, 5, 5)
#define OP_TLBI_RVAALE1OSNXS sys_insn(1, 0, 9, 5, 7)
#define OP_TLBI_RVAE1NXS sys_insn(1, 0, 9, 6, 1)
#define OP_TLBI_RVAAE1NXS sys_insn(1, 0, 9, 6, 3)
#define OP_TLBI_RVALE1NXS sys_insn(1, 0, 9, 6, 5)
#define OP_TLBI_RVAALE1NXS sys_insn(1, 0, 9, 6, 7)
#define OP_TLBI_VMALLE1NXS sys_insn(1, 0, 9, 7, 0)
#define OP_TLBI_VAE1NXS sys_insn(1, 0, 9, 7, 1)
#define OP_TLBI_ASIDE1NXS sys_insn(1, 0, 9, 7, 2)
#define OP_TLBI_VAAE1NXS sys_insn(1, 0, 9, 7, 3)
#define OP_TLBI_VALE1NXS sys_insn(1, 0, 9, 7, 5)
#define OP_TLBI_VAALE1NXS sys_insn(1, 0, 9, 7, 7)
#define OP_TLBI_IPAS2E1IS sys_insn(1, 4, 8, 0, 1)
#define OP_TLBI_RIPAS2E1IS sys_insn(1, 4, 8, 0, 2)
#define OP_TLBI_IPAS2LE1IS sys_insn(1, 4, 8, 0, 5)
#define OP_TLBI_RIPAS2LE1IS sys_insn(1, 4, 8, 0, 6)
#define OP_TLBI_ALLE2OS sys_insn(1, 4, 8, 1, 0)
#define OP_TLBI_VAE2OS sys_insn(1, 4, 8, 1, 1)
#define OP_TLBI_ALLE1OS sys_insn(1, 4, 8, 1, 4)
#define OP_TLBI_VALE2OS sys_insn(1, 4, 8, 1, 5)
#define OP_TLBI_VMALLS12E1OS sys_insn(1, 4, 8, 1, 6)
#define OP_TLBI_RVAE2IS sys_insn(1, 4, 8, 2, 1)
#define OP_TLBI_RVALE2IS sys_insn(1, 4, 8, 2, 5)
#define OP_TLBI_ALLE2IS sys_insn(1, 4, 8, 3, 0)
#define OP_TLBI_VAE2IS sys_insn(1, 4, 8, 3, 1)
#define OP_TLBI_ALLE1IS sys_insn(1, 4, 8, 3, 4)
#define OP_TLBI_VALE2IS sys_insn(1, 4, 8, 3, 5)
#define OP_TLBI_VMALLS12E1IS sys_insn(1, 4, 8, 3, 6)
#define OP_TLBI_IPAS2E1OS sys_insn(1, 4, 8, 4, 0)
#define OP_TLBI_IPAS2E1 sys_insn(1, 4, 8, 4, 1)
#define OP_TLBI_RIPAS2E1 sys_insn(1, 4, 8, 4, 2)
#define OP_TLBI_RIPAS2E1OS sys_insn(1, 4, 8, 4, 3)
#define OP_TLBI_IPAS2LE1OS sys_insn(1, 4, 8, 4, 4)
#define OP_TLBI_IPAS2LE1 sys_insn(1, 4, 8, 4, 5)
#define OP_TLBI_RIPAS2LE1 sys_insn(1, 4, 8, 4, 6)
#define OP_TLBI_RIPAS2LE1OS sys_insn(1, 4, 8, 4, 7)
#define OP_TLBI_RVAE2OS sys_insn(1, 4, 8, 5, 1)
#define OP_TLBI_RVALE2OS sys_insn(1, 4, 8, 5, 5)
#define OP_TLBI_RVAE2 sys_insn(1, 4, 8, 6, 1)
#define OP_TLBI_RVALE2 sys_insn(1, 4, 8, 6, 5)
#define OP_TLBI_ALLE2 sys_insn(1, 4, 8, 7, 0)
#define OP_TLBI_VAE2 sys_insn(1, 4, 8, 7, 1)
#define OP_TLBI_ALLE1 sys_insn(1, 4, 8, 7, 4)
#define OP_TLBI_VALE2 sys_insn(1, 4, 8, 7, 5)
#define OP_TLBI_VMALLS12E1 sys_insn(1, 4, 8, 7, 6)
#define OP_TLBI_IPAS2E1ISNXS sys_insn(1, 4, 9, 0, 1)
#define OP_TLBI_RIPAS2E1ISNXS sys_insn(1, 4, 9, 0, 2)
#define OP_TLBI_IPAS2LE1ISNXS sys_insn(1, 4, 9, 0, 5)
#define OP_TLBI_RIPAS2LE1ISNXS sys_insn(1, 4, 9, 0, 6)
#define OP_TLBI_ALLE2OSNXS sys_insn(1, 4, 9, 1, 0)
#define OP_TLBI_VAE2OSNXS sys_insn(1, 4, 9, 1, 1)
#define OP_TLBI_ALLE1OSNXS sys_insn(1, 4, 9, 1, 4)
#define OP_TLBI_VALE2OSNXS sys_insn(1, 4, 9, 1, 5)
#define OP_TLBI_VMALLS12E1OSNXS sys_insn(1, 4, 9, 1, 6)
#define OP_TLBI_RVAE2ISNXS sys_insn(1, 4, 9, 2, 1)
#define OP_TLBI_RVALE2ISNXS sys_insn(1, 4, 9, 2, 5)
#define OP_TLBI_ALLE2ISNXS sys_insn(1, 4, 9, 3, 0)
#define OP_TLBI_VAE2ISNXS sys_insn(1, 4, 9, 3, 1)
#define OP_TLBI_ALLE1ISNXS sys_insn(1, 4, 9, 3, 4)
#define OP_TLBI_VALE2ISNXS sys_insn(1, 4, 9, 3, 5)
#define OP_TLBI_VMALLS12E1ISNXS sys_insn(1, 4, 9, 3, 6)
#define OP_TLBI_IPAS2E1OSNXS sys_insn(1, 4, 9, 4, 0)
#define OP_TLBI_IPAS2E1NXS sys_insn(1, 4, 9, 4, 1)
#define OP_TLBI_RIPAS2E1NXS sys_insn(1, 4, 9, 4, 2)
#define OP_TLBI_RIPAS2E1OSNXS sys_insn(1, 4, 9, 4, 3)
#define OP_TLBI_IPAS2LE1OSNXS sys_insn(1, 4, 9, 4, 4)
#define OP_TLBI_IPAS2LE1NXS sys_insn(1, 4, 9, 4, 5)
#define OP_TLBI_RIPAS2LE1NXS sys_insn(1, 4, 9, 4, 6)
#define OP_TLBI_RIPAS2LE1OSNXS sys_insn(1, 4, 9, 4, 7)
#define OP_TLBI_RVAE2OSNXS sys_insn(1, 4, 9, 5, 1)
#define OP_TLBI_RVALE2OSNXS sys_insn(1, 4, 9, 5, 5)
#define OP_TLBI_RVAE2NXS sys_insn(1, 4, 9, 6, 1)
#define OP_TLBI_RVALE2NXS sys_insn(1, 4, 9, 6, 5)
#define OP_TLBI_ALLE2NXS sys_insn(1, 4, 9, 7, 0)
#define OP_TLBI_VAE2NXS sys_insn(1, 4, 9, 7, 1)
#define OP_TLBI_ALLE1NXS sys_insn(1, 4, 9, 7, 4)
#define OP_TLBI_VALE2NXS sys_insn(1, 4, 9, 7, 5)
#define OP_TLBI_VMALLS12E1NXS sys_insn(1, 4, 9, 7, 6)
/* Misc instructions */
#define OP_BRB_IALL sys_insn(1, 1, 7, 2, 4)
#define OP_BRB_INJ sys_insn(1, 1, 7, 2, 5)
#define OP_CFP_RCTX sys_insn(1, 3, 7, 3, 4)
#define OP_DVP_RCTX sys_insn(1, 3, 7, 3, 5)
#define OP_CPP_RCTX sys_insn(1, 3, 7, 3, 7)
/* Common SCTLR_ELx flags. */
#define SCTLR_ELx_ENTP2 (BIT(60))
#define SCTLR_ELx_DSSBS (BIT(44))

122
arch/arm64/include/asm/tlbflush.h
View File

@ -335,14 +335,77 @@ static inline void arch_tlbbatch_flush(struct arch_tlbflush_unmap_batch *batch)
*/
#define MAX_TLBI_OPS PTRS_PER_PTE
/*
* __flush_tlb_range_op - Perform TLBI operation upon a range
*
* @op: TLBI instruction that operates on a range (has 'r' prefix)
* @start: The start address of the range
* @pages: Range as the number of pages from 'start'
* @stride: Flush granularity
* @asid: The ASID of the task (0 for IPA instructions)
* @tlb_level: Translation Table level hint, if known
* @tlbi_user: If 'true', call an additional __tlbi_user()
* (typically for user ASIDs). 'flase' for IPA instructions
*
* When the CPU does not support TLB range operations, flush the TLB
* entries one by one at the granularity of 'stride'. If the TLB
* range ops are supported, then:
*
* 1. If 'pages' is odd, flush the first page through non-range
* operations;
*
* 2. For remaining pages: the minimum range granularity is decided
* by 'scale', so multiple range TLBI operations may be required.
* Start from scale = 0, flush the corresponding number of pages
* ((num+1)*2^(5*scale+1) starting from 'addr'), then increase it
* until no pages left.
*
* Note that certain ranges can be represented by either num = 31 and
* scale or num = 0 and scale + 1. The loop below favours the latter
* since num is limited to 30 by the __TLBI_RANGE_NUM() macro.
*/
#define __flush_tlb_range_op(op, start, pages, stride, \
asid, tlb_level, tlbi_user) \
do { \
int num = 0; \
int scale = 0; \
unsigned long addr; \
\
while (pages > 0) { \
if (!system_supports_tlb_range() || \
pages % 2 == 1) { \
addr = __TLBI_VADDR(start, asid); \
__tlbi_level(op, addr, tlb_level); \
if (tlbi_user) \
__tlbi_user_level(op, addr, tlb_level); \
start += stride; \
pages -= stride >> PAGE_SHIFT; \
continue; \
} \
\
num = __TLBI_RANGE_NUM(pages, scale); \
if (num >= 0) { \
addr = __TLBI_VADDR_RANGE(start, asid, scale, \
num, tlb_level); \
__tlbi(r##op, addr); \
if (tlbi_user) \
__tlbi_user(r##op, addr); \
start += __TLBI_RANGE_PAGES(num, scale) << PAGE_SHIFT; \
pages -= __TLBI_RANGE_PAGES(num, scale); \
} \
scale++; \
} \
} while (0)
#define __flush_s2_tlb_range_op(op, start, pages, stride, tlb_level) \
__flush_tlb_range_op(op, start, pages, stride, 0, tlb_level, false)
static inline void __flush_tlb_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end,
unsigned long stride, bool last_level,
int tlb_level)
{
int num = 0;
int scale = 0;
unsigned long asid, addr, pages;
unsigned long asid, pages;
start = round_down(start, stride);
end = round_up(end, stride);
@ -364,56 +427,11 @@ static inline void __flush_tlb_range(struct vm_area_struct *vma,
dsb(ishst);
asid = ASID(vma->vm_mm);
/*
* When the CPU does not support TLB range operations, flush the TLB
* entries one by one at the granularity of 'stride'. If the TLB
* range ops are supported, then:
*
* 1. If 'pages' is odd, flush the first page through non-range
* operations;
*
* 2. For remaining pages: the minimum range granularity is decided
* by 'scale', so multiple range TLBI operations may be required.
* Start from scale = 0, flush the corresponding number of pages
* ((num+1)*2^(5*scale+1) starting from 'addr'), then increase it
* until no pages left.
*
* Note that certain ranges can be represented by either num = 31 and
* scale or num = 0 and scale + 1. The loop below favours the latter
* since num is limited to 30 by the __TLBI_RANGE_NUM() macro.
*/
while (pages > 0) {
if (!system_supports_tlb_range() ||
pages % 2 == 1) {
addr = __TLBI_VADDR(start, asid);
if (last_level) {
__tlbi_level(vale1is, addr, tlb_level);
__tlbi_user_level(vale1is, addr, tlb_level);
} else {
__tlbi_level(vae1is, addr, tlb_level);
__tlbi_user_level(vae1is, addr, tlb_level);
}
start += stride;
pages -= stride >> PAGE_SHIFT;
continue;
}
if (last_level)
__flush_tlb_range_op(vale1is, start, pages, stride, asid, tlb_level, true);
else
__flush_tlb_range_op(vae1is, start, pages, stride, asid, tlb_level, true);
num = __TLBI_RANGE_NUM(pages, scale);
if (num >= 0) {
addr = __TLBI_VADDR_RANGE(start, asid, scale,
num, tlb_level);
if (last_level) {
__tlbi(rvale1is, addr);
__tlbi_user(rvale1is, addr);
} else {
__tlbi(rvae1is, addr);
__tlbi_user(rvae1is, addr);
}
start += __TLBI_RANGE_PAGES(num, scale) << PAGE_SHIFT;
pages -= __TLBI_RANGE_PAGES(num, scale);
}
scale++;
}
dsb(ish);
mmu_notifier_arch_invalidate_secondary_tlbs(vma->vm_mm, start, end);
}

7
arch/arm64/kernel/cpufeature.c
View File

@ -2627,6 +2627,13 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
.matches = has_cpuid_feature,
ARM64_CPUID_FIELDS(ID_AA64ISAR1_EL1, LRCPC, IMP)
},
{
.desc = "Fine Grained Traps",
.type = ARM64_CPUCAP_SYSTEM_FEATURE,
.capability = ARM64_HAS_FGT,
.matches = has_cpuid_feature,
ARM64_CPUID_FIELDS(ID_AA64MMFR0_EL1, FGT, IMP)
},
#ifdef CONFIG_ARM64_SME
{
.desc = "Scalable Matrix Extension",

2
arch/arm64/kvm/Kconfig
View File

@ -25,7 +25,6 @@ menuconfig KVM
select MMU_NOTIFIER
select PREEMPT_NOTIFIERS
select HAVE_KVM_CPU_RELAX_INTERCEPT
select HAVE_KVM_ARCH_TLB_FLUSH_ALL
select KVM_MMIO
select KVM_GENERIC_DIRTYLOG_READ_PROTECT
select KVM_XFER_TO_GUEST_WORK
@ -43,6 +42,7 @@ menuconfig KVM
select SCHED_INFO
select GUEST_PERF_EVENTS if PERF_EVENTS
select INTERVAL_TREE
select XARRAY_MULTI
help
Support hosting virtualized guest machines.

65
arch/arm64/kvm/arm.c
View File

@ -36,6 +36,7 @@
#include <asm/kvm_arm.h>
#include <asm/kvm_asm.h>
#include <asm/kvm_mmu.h>
#include <asm/kvm_nested.h>
#include <asm/kvm_pkvm.h>
#include <asm/kvm_emulate.h>
#include <asm/sections.h>
@ -365,7 +366,7 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
#endif
/* Force users to call KVM_ARM_VCPU_INIT */
vcpu->arch.target = -1;
vcpu_clear_flag(vcpu, VCPU_INITIALIZED);
bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES);
vcpu->arch.mmu_page_cache.gfp_zero = __GFP_ZERO;
@ -462,7 +463,7 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
vcpu_ptrauth_disable(vcpu);
kvm_arch_vcpu_load_debug_state_flags(vcpu);
if (!cpumask_test_cpu(smp_processor_id(), vcpu->kvm->arch.supported_cpus))
if (!cpumask_test_cpu(cpu, vcpu->kvm->arch.supported_cpus))
vcpu_set_on_unsupported_cpu(vcpu);
}
@ -574,7 +575,7 @@ unsigned long kvm_arch_vcpu_get_ip(struct kvm_vcpu *vcpu)
static int kvm_vcpu_initialized(struct kvm_vcpu *vcpu)
{
return vcpu->arch.target >= 0;
return vcpu_get_flag(vcpu, VCPU_INITIALIZED);
}
/*
@ -803,6 +804,9 @@ static int check_vcpu_requests(struct kvm_vcpu *vcpu)
kvm_pmu_handle_pmcr(vcpu,
__vcpu_sys_reg(vcpu, PMCR_EL0));
if (kvm_check_request(KVM_REQ_RESYNC_PMU_EL0, vcpu))
kvm_vcpu_pmu_restore_guest(vcpu);
if (kvm_check_request(KVM_REQ_SUSPEND, vcpu))
return kvm_vcpu_suspend(vcpu);
@ -818,6 +822,9 @@ static bool vcpu_mode_is_bad_32bit(struct kvm_vcpu *vcpu)
if (likely(!vcpu_mode_is_32bit(vcpu)))
return false;
if (vcpu_has_nv(vcpu))
return true;
return !kvm_supports_32bit_el0();
}
@ -1058,7 +1065,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
* invalid. The VMM can try and fix it by issuing a
* KVM_ARM_VCPU_INIT if it really wants to.
*/
vcpu->arch.target = -1;
vcpu_clear_flag(vcpu, VCPU_INITIALIZED);
ret = ARM_EXCEPTION_IL;
}
@ -1219,8 +1226,7 @@ static bool kvm_vcpu_init_changed(struct kvm_vcpu *vcpu,
{
unsigned long features = init->features[0];
return !bitmap_equal(vcpu->arch.features, &features, KVM_VCPU_MAX_FEATURES) ||
vcpu->arch.target != init->target;
return !bitmap_equal(vcpu->arch.features, &features, KVM_VCPU_MAX_FEATURES);
}
static int __kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
@ -1236,20 +1242,18 @@ static int __kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
!bitmap_equal(kvm->arch.vcpu_features, &features, KVM_VCPU_MAX_FEATURES))
goto out_unlock;
vcpu->arch.target = init->target;
bitmap_copy(vcpu->arch.features, &features, KVM_VCPU_MAX_FEATURES);
/* Now we know what it is, we can reset it. */
ret = kvm_reset_vcpu(vcpu);
if (ret) {
vcpu->arch.target = -1;
bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES);
goto out_unlock;
}
bitmap_copy(kvm->arch.vcpu_features, &features, KVM_VCPU_MAX_FEATURES);
set_bit(KVM_ARCH_FLAG_VCPU_FEATURES_CONFIGURED, &kvm->arch.flags);
vcpu_set_flag(vcpu, VCPU_INITIALIZED);
out_unlock:
mutex_unlock(&kvm->arch.config_lock);
return ret;
@ -1260,14 +1264,15 @@ static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
{
int ret;
if (init->target != kvm_target_cpu())
if (init->target != KVM_ARM_TARGET_GENERIC_V8 &&
init->target != kvm_target_cpu())
return -EINVAL;
ret = kvm_vcpu_init_check_features(vcpu, init);
if (ret)
return ret;
if (vcpu->arch.target == -1)
if (!kvm_vcpu_initialized(vcpu))
return __kvm_vcpu_set_target(vcpu, init);
if (kvm_vcpu_init_changed(vcpu, init))
@ -1532,12 +1537,6 @@ void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
}
void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm,
const struct kvm_memory_slot *memslot)
{
kvm_flush_remote_tlbs(kvm);
}
static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm,
struct kvm_arm_device_addr *dev_addr)
{
@ -1595,9 +1594,9 @@ int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
return kvm_vm_ioctl_set_device_addr(kvm, &dev_addr);
}
case KVM_ARM_PREFERRED_TARGET: {
struct kvm_vcpu_init init;
kvm_vcpu_preferred_target(&init);
struct kvm_vcpu_init init = {
.target = KVM_ARM_TARGET_GENERIC_V8,
};
if (copy_to_user(argp, &init, sizeof(init)))
return -EFAULT;
@ -2276,30 +2275,8 @@ static int __init init_hyp_mode(void)
for_each_possible_cpu(cpu) {
struct kvm_nvhe_init_params *params = per_cpu_ptr_nvhe_sym(kvm_init_params, cpu);
char *stack_page = (char *)per_cpu(kvm_arm_hyp_stack_page, cpu);
unsigned long hyp_addr;
/*
* Allocate a contiguous HYP private VA range for the stack
* and guard page. The allocation is also aligned based on
* the order of its size.
*/
err = hyp_alloc_private_va_range(PAGE_SIZE * 2, &hyp_addr);
if (err) {
kvm_err("Cannot allocate hyp stack guard page\n");
goto out_err;
}
/*
* Since the stack grows downwards, map the stack to the page
* at the higher address and leave the lower guard page
* unbacked.
*
* Any valid stack address now has the PAGE_SHIFT bit as 1
* and addresses corresponding to the guard page have the
* PAGE_SHIFT bit as 0 - this is used for overflow detection.
*/
err = __create_hyp_mappings(hyp_addr + PAGE_SIZE, PAGE_SIZE,
__pa(stack_page), PAGE_HYP);
err = create_hyp_stack(__pa(stack_page), &params->stack_hyp_va);
if (err) {
kvm_err("Cannot map hyp stack\n");
goto out_err;
@ -2312,8 +2289,6 @@ static int __init init_hyp_mode(void)
* has been mapped in the flexible private VA space.
*/
params->stack_pa = __pa(stack_page);
params->stack_hyp_va = hyp_addr + (2 * PAGE_SIZE);
}
for_each_possible_cpu(cpu) {

1852
arch/arm64/kvm/emulate-nested.c
View File

File diff suppressed because it is too large Load Diff

15
arch/arm64/kvm/guest.c
View File

@ -884,21 +884,6 @@ u32 __attribute_const__ kvm_target_cpu(void)
return KVM_ARM_TARGET_GENERIC_V8;
}
void kvm_vcpu_preferred_target(struct kvm_vcpu_init *init)
{
u32 target = kvm_target_cpu();
memset(init, 0, sizeof(*init));
/*
* For now, we don't return any features.
* In future, we might use features to return target
* specific features available for the preferred
* target type.
*/
init->target = (__u32)target;
}
int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
return -EINVAL;

29
arch/arm64/kvm/handle_exit.c
View File

@ -222,7 +222,33 @@ static int kvm_handle_eret(struct kvm_vcpu *vcpu)
if (kvm_vcpu_get_esr(vcpu) & ESR_ELx_ERET_ISS_ERET)
return kvm_handle_ptrauth(vcpu);
kvm_emulate_nested_eret(vcpu);
/*
* If we got here, two possibilities:
*
* - the guest is in EL2, and we need to fully emulate ERET
*
* - the guest is in EL1, and we need to reinject the
* exception into the L1 hypervisor.
*
* If KVM ever traps ERET for its own use, we'll have to
* revisit this.
*/
if (is_hyp_ctxt(vcpu))
kvm_emulate_nested_eret(vcpu);
else
kvm_inject_nested_sync(vcpu, kvm_vcpu_get_esr(vcpu));
return 1;
}
static int handle_svc(struct kvm_vcpu *vcpu)
{
/*
* So far, SVC traps only for NV via HFGITR_EL2. A SVC from a
* 32bit guest would be caught by vpcu_mode_is_bad_32bit(), so
* we should only have to deal with a 64 bit exception.
*/
kvm_inject_nested_sync(vcpu, kvm_vcpu_get_esr(vcpu));
return 1;
}
@ -239,6 +265,7 @@ static exit_handle_fn arm_exit_handlers[] = {
[ESR_ELx_EC_SMC32] = handle_smc,
[ESR_ELx_EC_HVC64] = handle_hvc,
[ESR_ELx_EC_SMC64] = handle_smc,
[ESR_ELx_EC_SVC64] = handle_svc,
[ESR_ELx_EC_SYS64] = kvm_handle_sys_reg,
[ESR_ELx_EC_SVE] = handle_sve,
[ESR_ELx_EC_ERET] = kvm_handle_eret,

139
arch/arm64/kvm/hyp/include/hyp/switch.h
View File

@ -70,20 +70,26 @@ static inline void __activate_traps_fpsimd32(struct kvm_vcpu *vcpu)
}
}
static inline bool __hfgxtr_traps_required(void)
{
if (cpus_have_final_cap(ARM64_SME))
return true;
if (cpus_have_final_cap(ARM64_WORKAROUND_AMPERE_AC03_CPU_38))
return true;
return false;
}
static inline void __activate_traps_hfgxtr(void)
#define compute_clr_set(vcpu, reg, clr, set) \
do { \
u64 hfg; \
hfg = __vcpu_sys_reg(vcpu, reg) & ~__ ## reg ## _RES0; \
set |= hfg & __ ## reg ## _MASK; \
clr |= ~hfg & __ ## reg ## _nMASK; \
} while(0)
static inline void __activate_traps_hfgxtr(struct kvm_vcpu *vcpu)
{
struct kvm_cpu_context *hctxt = &this_cpu_ptr(&kvm_host_data)->host_ctxt;
u64 r_clr = 0, w_clr = 0, r_set = 0, w_set = 0, tmp;
u64 r_val, w_val;
if (!cpus_have_final_cap(ARM64_HAS_FGT))
return;
ctxt_sys_reg(hctxt, HFGRTR_EL2) = read_sysreg_s(SYS_HFGRTR_EL2);
ctxt_sys_reg(hctxt, HFGWTR_EL2) = read_sysreg_s(SYS_HFGWTR_EL2);
if (cpus_have_final_cap(ARM64_SME)) {
tmp = HFGxTR_EL2_nSMPRI_EL1_MASK | HFGxTR_EL2_nTPIDR2_EL0_MASK;
@ -98,26 +104,72 @@ static inline void __activate_traps_hfgxtr(void)
if (cpus_have_final_cap(ARM64_WORKAROUND_AMPERE_AC03_CPU_38))
w_set |= HFGxTR_EL2_TCR_EL1_MASK;
sysreg_clear_set_s(SYS_HFGRTR_EL2, r_clr, r_set);
sysreg_clear_set_s(SYS_HFGWTR_EL2, w_clr, w_set);
}
static inline void __deactivate_traps_hfgxtr(void)
{
u64 r_clr = 0, w_clr = 0, r_set = 0, w_set = 0, tmp;
if (cpus_have_final_cap(ARM64_SME)) {
tmp = HFGxTR_EL2_nSMPRI_EL1_MASK | HFGxTR_EL2_nTPIDR2_EL0_MASK;
r_set |= tmp;
w_set |= tmp;
if (vcpu_has_nv(vcpu) && !is_hyp_ctxt(vcpu)) {
compute_clr_set(vcpu, HFGRTR_EL2, r_clr, r_set);
compute_clr_set(vcpu, HFGWTR_EL2, w_clr, w_set);
}
if (cpus_have_final_cap(ARM64_WORKAROUND_AMPERE_AC03_CPU_38))
w_clr |= HFGxTR_EL2_TCR_EL1_MASK;
/* The default is not to trap anything but ACCDATA_EL1 */
r_val = __HFGRTR_EL2_nMASK & ~HFGxTR_EL2_nACCDATA_EL1;
r_val |= r_set;
r_val &= ~r_clr;
sysreg_clear_set_s(SYS_HFGRTR_EL2, r_clr, r_set);
sysreg_clear_set_s(SYS_HFGWTR_EL2, w_clr, w_set);
w_val = __HFGWTR_EL2_nMASK & ~HFGxTR_EL2_nACCDATA_EL1;
w_val |= w_set;
w_val &= ~w_clr;
write_sysreg_s(r_val, SYS_HFGRTR_EL2);
write_sysreg_s(w_val, SYS_HFGWTR_EL2);
if (!vcpu_has_nv(vcpu) || is_hyp_ctxt(vcpu))
return;
ctxt_sys_reg(hctxt, HFGITR_EL2) = read_sysreg_s(SYS_HFGITR_EL2);
r_set = r_clr = 0;
compute_clr_set(vcpu, HFGITR_EL2, r_clr, r_set);
r_val = __HFGITR_EL2_nMASK;
r_val |= r_set;
r_val &= ~r_clr;
write_sysreg_s(r_val, SYS_HFGITR_EL2);
ctxt_sys_reg(hctxt, HDFGRTR_EL2) = read_sysreg_s(SYS_HDFGRTR_EL2);
ctxt_sys_reg(hctxt, HDFGWTR_EL2) = read_sysreg_s(SYS_HDFGWTR_EL2);
r_clr = r_set = w_clr = w_set = 0;
compute_clr_set(vcpu, HDFGRTR_EL2, r_clr, r_set);
compute_clr_set(vcpu, HDFGWTR_EL2, w_clr, w_set);
r_val = __HDFGRTR_EL2_nMASK;
r_val |= r_set;
r_val &= ~r_clr;
w_val = __HDFGWTR_EL2_nMASK;
w_val |= w_set;
w_val &= ~w_clr;
write_sysreg_s(r_val, SYS_HDFGRTR_EL2);
write_sysreg_s(w_val, SYS_HDFGWTR_EL2);
}
static inline void __deactivate_traps_hfgxtr(struct kvm_vcpu *vcpu)
{
struct kvm_cpu_context *hctxt = &this_cpu_ptr(&kvm_host_data)->host_ctxt;
if (!cpus_have_final_cap(ARM64_HAS_FGT))
return;
write_sysreg_s(ctxt_sys_reg(hctxt, HFGRTR_EL2), SYS_HFGRTR_EL2);
write_sysreg_s(ctxt_sys_reg(hctxt, HFGWTR_EL2), SYS_HFGWTR_EL2);
if (!vcpu_has_nv(vcpu) || is_hyp_ctxt(vcpu))
return;
write_sysreg_s(ctxt_sys_reg(hctxt, HFGITR_EL2), SYS_HFGITR_EL2);
write_sysreg_s(ctxt_sys_reg(hctxt, HDFGRTR_EL2), SYS_HDFGRTR_EL2);
write_sysreg_s(ctxt_sys_reg(hctxt, HDFGWTR_EL2), SYS_HDFGWTR_EL2);
}
static inline void __activate_traps_common(struct kvm_vcpu *vcpu)
@ -145,8 +197,21 @@ static inline void __activate_traps_common(struct kvm_vcpu *vcpu)
vcpu->arch.mdcr_el2_host = read_sysreg(mdcr_el2);
write_sysreg(vcpu->arch.mdcr_el2, mdcr_el2);
if (__hfgxtr_traps_required())
__activate_traps_hfgxtr();
if (cpus_have_final_cap(ARM64_HAS_HCX)) {
u64 hcrx = HCRX_GUEST_FLAGS;
if (vcpu_has_nv(vcpu) && !is_hyp_ctxt(vcpu)) {
u64 clr = 0, set = 0;
compute_clr_set(vcpu, HCRX_EL2, clr, set);
hcrx |= set;
hcrx &= ~clr;
}
write_sysreg_s(hcrx, SYS_HCRX_EL2);
}
__activate_traps_hfgxtr(vcpu);
}
static inline void __deactivate_traps_common(struct kvm_vcpu *vcpu)
@ -162,8 +227,10 @@ static inline void __deactivate_traps_common(struct kvm_vcpu *vcpu)
vcpu_clear_flag(vcpu, PMUSERENR_ON_CPU);
}
if (__hfgxtr_traps_required())
__deactivate_traps_hfgxtr();
if (cpus_have_final_cap(ARM64_HAS_HCX))
write_sysreg_s(HCRX_HOST_FLAGS, SYS_HCRX_EL2);
__deactivate_traps_hfgxtr(vcpu);
}
static inline void ___activate_traps(struct kvm_vcpu *vcpu)
@ -177,9 +244,6 @@ static inline void ___activate_traps(struct kvm_vcpu *vcpu)
if (cpus_have_final_cap(ARM64_HAS_RAS_EXTN) && (hcr & HCR_VSE))
write_sysreg_s(vcpu->arch.vsesr_el2, SYS_VSESR_EL2);
if (cpus_have_final_cap(ARM64_HAS_HCX))
write_sysreg_s(HCRX_GUEST_FLAGS, SYS_HCRX_EL2);
}
static inline void ___deactivate_traps(struct kvm_vcpu *vcpu)
@ -194,9 +258,6 @@ static inline void ___deactivate_traps(struct kvm_vcpu *vcpu)
vcpu->arch.hcr_el2 &= ~HCR_VSE;
vcpu->arch.hcr_el2 |= read_sysreg(hcr_el2) & HCR_VSE;
}
if (cpus_have_final_cap(ARM64_HAS_HCX))
write_sysreg_s(HCRX_HOST_FLAGS, SYS_HCRX_EL2);
}
static inline bool __populate_fault_info(struct kvm_vcpu *vcpu)

1
arch/arm64/kvm/hyp/include/nvhe/mm.h
View File

@ -26,6 +26,7 @@ int pkvm_create_mappings_locked(void *from, void *to, enum kvm_pgtable_prot prot
int __pkvm_create_private_mapping(phys_addr_t phys, size_t size,
enum kvm_pgtable_prot prot,
unsigned long *haddr);
int pkvm_create_stack(phys_addr_t phys, unsigned long *haddr);
int pkvm_alloc_private_va_range(size_t size, unsigned long *haddr);
#endif /* __KVM_HYP_MM_H */

11
arch/arm64/kvm/hyp/nvhe/hyp-main.c
View File

@ -135,6 +135,16 @@ static void handle___kvm_tlb_flush_vmid_ipa_nsh(struct kvm_cpu_context *host_ctx
__kvm_tlb_flush_vmid_ipa_nsh(kern_hyp_va(mmu), ipa, level);
}
static void
handle___kvm_tlb_flush_vmid_range(struct kvm_cpu_context *host_ctxt)
{
DECLARE_REG(struct kvm_s2_mmu *, mmu, host_ctxt, 1);
DECLARE_REG(phys_addr_t, start, host_ctxt, 2);
DECLARE_REG(unsigned long, pages, host_ctxt, 3);
__kvm_tlb_flush_vmid_range(kern_hyp_va(mmu), start, pages);
}
static void handle___kvm_tlb_flush_vmid(struct kvm_cpu_context *host_ctxt)
{
DECLARE_REG(struct kvm_s2_mmu *, mmu, host_ctxt, 1);
@ -327,6 +337,7 @@ static const hcall_t host_hcall[] = {
HANDLE_FUNC(__kvm_tlb_flush_vmid_ipa),
HANDLE_FUNC(__kvm_tlb_flush_vmid_ipa_nsh),
HANDLE_FUNC(__kvm_tlb_flush_vmid),
HANDLE_FUNC(__kvm_tlb_flush_vmid_range),
HANDLE_FUNC(__kvm_flush_cpu_context),
HANDLE_FUNC(__kvm_timer_set_cntvoff),
HANDLE_FUNC(__vgic_v3_read_vmcr),

83
arch/arm64/kvm/hyp/nvhe/mm.c
View File

@ -44,6 +44,27 @@ static int __pkvm_create_mappings(unsigned long start, unsigned long size,
return err;
}
static int __pkvm_alloc_private_va_range(unsigned long start, size_t size)
{
unsigned long cur;
hyp_assert_lock_held(&pkvm_pgd_lock);
if (!start || start < __io_map_base)
return -EINVAL;
/* The allocated size is always a multiple of PAGE_SIZE */
cur = start + PAGE_ALIGN(size);
/* Are we overflowing on the vmemmap ? */
if (cur > __hyp_vmemmap)
return -ENOMEM;
__io_map_base = cur;
return 0;
}
/**
* pkvm_alloc_private_va_range - Allocates a private VA range.
* @size: The size of the VA range to reserve.
@ -56,27 +77,16 @@ static int __pkvm_create_mappings(unsigned long start, unsigned long size,
*/
int pkvm_alloc_private_va_range(size_t size, unsigned long *haddr)
{
unsigned long base, addr;
int ret = 0;
unsigned long addr;
int ret;
hyp_spin_lock(&pkvm_pgd_lock);
/* Align the allocation based on the order of its size */
addr = ALIGN(__io_map_base, PAGE_SIZE << get_order(size));
/* The allocated size is always a multiple of PAGE_SIZE */
base = addr + PAGE_ALIGN(size);
/* Are we overflowing on the vmemmap ? */
if (!addr || base > __hyp_vmemmap)
ret = -ENOMEM;
else {
__io_map_base = base;
*haddr = addr;
}
addr = __io_map_base;
ret = __pkvm_alloc_private_va_range(addr, size);
hyp_spin_unlock(&pkvm_pgd_lock);
*haddr = addr;
return ret;
}
@ -340,6 +350,45 @@ int hyp_create_idmap(u32 hyp_va_bits)
return __pkvm_create_mappings(start, end - start, start, PAGE_HYP_EXEC);
}
int pkvm_create_stack(phys_addr_t phys, unsigned long *haddr)
{
unsigned long addr, prev_base;
size_t size;
int ret;
hyp_spin_lock(&pkvm_pgd_lock);
prev_base = __io_map_base;
/*
* Efficient stack verification using the PAGE_SHIFT bit implies
* an alignment of our allocation on the order of the size.
*/
size = PAGE_SIZE * 2;
addr = ALIGN(__io_map_base, size);
ret = __pkvm_alloc_private_va_range(addr, size);
if (!ret) {
/*
* Since the stack grows downwards, map the stack to the page
* at the higher address and leave the lower guard page
* unbacked.
*
* Any valid stack address now has the PAGE_SHIFT bit as 1
* and addresses corresponding to the guard page have the
* PAGE_SHIFT bit as 0 - this is used for overflow detection.
*/
ret = kvm_pgtable_hyp_map(&pkvm_pgtable, addr + PAGE_SIZE,
PAGE_SIZE, phys, PAGE_HYP);
if (ret)
__io_map_base = prev_base;
}
hyp_spin_unlock(&pkvm_pgd_lock);
*haddr = addr + size;
return ret;
}
static void *admit_host_page(void *arg)
{
struct kvm_hyp_memcache *host_mc = arg;

27
arch/arm64/kvm/hyp/nvhe/setup.c
View File

@ -113,7 +113,6 @@ static int recreate_hyp_mappings(phys_addr_t phys, unsigned long size,
for (i = 0; i < hyp_nr_cpus; i++) {
struct kvm_nvhe_init_params *params = per_cpu_ptr(&kvm_init_params, i);
unsigned long hyp_addr;
start = (void *)kern_hyp_va(per_cpu_base[i]);
end = start + PAGE_ALIGN(hyp_percpu_size);
@ -121,33 +120,9 @@ static int recreate_hyp_mappings(phys_addr_t phys, unsigned long size,
if (ret)
return ret;
/*
* Allocate a contiguous HYP private VA range for the stack
* and guard page. The allocation is also aligned based on
* the order of its size.
*/
ret = pkvm_alloc_private_va_range(PAGE_SIZE * 2, &hyp_addr);
ret = pkvm_create_stack(params->stack_pa, &params->stack_hyp_va);
if (ret)
return ret;
/*
* Since the stack grows downwards, map the stack to the page
* at the higher address and leave the lower guard page
* unbacked.
*
* Any valid stack address now has the PAGE_SHIFT bit as 1
* and addresses corresponding to the guard page have the
* PAGE_SHIFT bit as 0 - this is used for overflow detection.
*/
hyp_spin_lock(&pkvm_pgd_lock);
ret = kvm_pgtable_hyp_map(&pkvm_pgtable, hyp_addr + PAGE_SIZE,
PAGE_SIZE, params->stack_pa, PAGE_HYP);
hyp_spin_unlock(&pkvm_pgd_lock);
if (ret)
return ret;
/* Update stack_hyp_va to end of the stack's private VA range */
params->stack_hyp_va = hyp_addr + (2 * PAGE_SIZE);
}
/*

2
arch/arm64/kvm/hyp/nvhe/switch.c
View File

@ -236,7 +236,7 @@ static void early_exit_filter(struct kvm_vcpu *vcpu, u64 *exit_code)
* KVM_ARM_VCPU_INIT, however, this is likely not possible for
* protected VMs.
*/
vcpu->arch.target = -1;
vcpu_clear_flag(vcpu, VCPU_INITIALIZED);
*exit_code &= BIT(ARM_EXIT_WITH_SERROR_BIT);
*exit_code |= ARM_EXCEPTION_IL;
}

30
arch/arm64/kvm/hyp/nvhe/tlb.c
View File

@ -182,6 +182,36 @@ void __kvm_tlb_flush_vmid_ipa_nsh(struct kvm_s2_mmu *mmu,
__tlb_switch_to_host(&cxt);
}
void __kvm_tlb_flush_vmid_range(struct kvm_s2_mmu *mmu,
phys_addr_t start, unsigned long pages)
{
struct tlb_inv_context cxt;
unsigned long stride;
/*
* Since the range of addresses may not be mapped at
* the same level, assume the worst case as PAGE_SIZE
*/
stride = PAGE_SIZE;
start = round_down(start, stride);
/* Switch to requested VMID */
__tlb_switch_to_guest(mmu, &cxt, false);
__flush_s2_tlb_range_op(ipas2e1is, start, pages, stride, 0);
dsb(ish);
__tlbi(vmalle1is);
dsb(ish);
isb();
/* See the comment in __kvm_tlb_flush_vmid_ipa() */
if (icache_is_vpipt())
icache_inval_all_pou();
__tlb_switch_to_host(&cxt);
}
void __kvm_tlb_flush_vmid(struct kvm_s2_mmu *mmu)
{
struct tlb_inv_context cxt;

63
arch/arm64/kvm/hyp/pgtable.c
View File

@ -670,6 +670,26 @@ static bool stage2_has_fwb(struct kvm_pgtable *pgt)
return !(pgt->flags & KVM_PGTABLE_S2_NOFWB);
}
void kvm_tlb_flush_vmid_range(struct kvm_s2_mmu *mmu,
phys_addr_t addr, size_t size)
{
unsigned long pages, inval_pages;
if (!system_supports_tlb_range()) {
kvm_call_hyp(__kvm_tlb_flush_vmid, mmu);
return;
}
pages = size >> PAGE_SHIFT;
while (pages > 0) {
inval_pages = min(pages, MAX_TLBI_RANGE_PAGES);
kvm_call_hyp(__kvm_tlb_flush_vmid_range, mmu, addr, inval_pages);
addr += inval_pages << PAGE_SHIFT;
pages -= inval_pages;
}
}
#define KVM_S2_MEMATTR(pgt, attr) PAGE_S2_MEMATTR(attr, stage2_has_fwb(pgt))
static int stage2_set_prot_attr(struct kvm_pgtable *pgt, enum kvm_pgtable_prot prot,
@ -786,7 +806,8 @@ static bool stage2_try_break_pte(const struct kvm_pgtable_visit_ctx *ctx,
* evicted pte value (if any).
*/
if (kvm_pte_table(ctx->old, ctx->level))
kvm_call_hyp(__kvm_tlb_flush_vmid, mmu);
kvm_tlb_flush_vmid_range(mmu, ctx->addr,
kvm_granule_size(ctx->level));
else if (kvm_pte_valid(ctx->old))
kvm_call_hyp(__kvm_tlb_flush_vmid_ipa, mmu,
ctx->addr, ctx->level);
@ -810,16 +831,36 @@ static void stage2_make_pte(const struct kvm_pgtable_visit_ctx *ctx, kvm_pte_t n
smp_store_release(ctx->ptep, new);
}
static void stage2_put_pte(const struct kvm_pgtable_visit_ctx *ctx, struct kvm_s2_mmu *mmu,
struct kvm_pgtable_mm_ops *mm_ops)
static bool stage2_unmap_defer_tlb_flush(struct kvm_pgtable *pgt)
{
/*
* Clear the existing PTE, and perform break-before-make with
* TLB maintenance if it was valid.
* If FEAT_TLBIRANGE is implemented, defer the individual
* TLB invalidations until the entire walk is finished, and
* then use the range-based TLBI instructions to do the
* invalidations. Condition deferred TLB invalidation on the
* system supporting FWB as the optimization is entirely
* pointless when the unmap walker needs to perform CMOs.
*/
return system_supports_tlb_range() && stage2_has_fwb(pgt);
}
static void stage2_unmap_put_pte(const struct kvm_pgtable_visit_ctx *ctx,
struct kvm_s2_mmu *mmu,
struct kvm_pgtable_mm_ops *mm_ops)
{
struct kvm_pgtable *pgt = ctx->arg;
/*
* Clear the existing PTE, and perform break-before-make if it was
* valid. Depending on the system support, defer the TLB maintenance
* for the same until the entire unmap walk is completed.
*/
if (kvm_pte_valid(ctx->old)) {
kvm_clear_pte(ctx->ptep);
kvm_call_hyp(__kvm_tlb_flush_vmid_ipa, mmu, ctx->addr, ctx->level);
if (!stage2_unmap_defer_tlb_flush(pgt))
kvm_call_hyp(__kvm_tlb_flush_vmid_ipa, mmu,
ctx->addr, ctx->level);
}
mm_ops->put_page(ctx->ptep);
@ -1077,7 +1118,7 @@ static int stage2_unmap_walker(const struct kvm_pgtable_visit_ctx *ctx,
* block entry and rely on the remaining portions being faulted
* back lazily.
*/
stage2_put_pte(ctx, mmu, mm_ops);
stage2_unmap_put_pte(ctx, mmu, mm_ops);
if (need_flush && mm_ops->dcache_clean_inval_poc)
mm_ops->dcache_clean_inval_poc(kvm_pte_follow(ctx->old, mm_ops),
@ -1091,13 +1132,19 @@ static int stage2_unmap_walker(const struct kvm_pgtable_visit_ctx *ctx,
int kvm_pgtable_stage2_unmap(struct kvm_pgtable *pgt, u64 addr, u64 size)
{
int ret;
struct kvm_pgtable_walker walker = {
.cb = stage2_unmap_walker,
.arg = pgt,
.flags = KVM_PGTABLE_WALK_LEAF | KVM_PGTABLE_WALK_TABLE_POST,
};
return kvm_pgtable_walk(pgt, addr, size, &walker);
ret = kvm_pgtable_walk(pgt, addr, size, &walker);
if (stage2_unmap_defer_tlb_flush(pgt))
/* Perform the deferred TLB invalidations */
kvm_tlb_flush_vmid_range(pgt->mmu, addr, size);
return ret;
}
struct stage2_attr_data {

28
arch/arm64/kvm/hyp/vhe/tlb.c
View File

@ -143,6 +143,34 @@ void __kvm_tlb_flush_vmid_ipa_nsh(struct kvm_s2_mmu *mmu,
__tlb_switch_to_host(&cxt);
}
void __kvm_tlb_flush_vmid_range(struct kvm_s2_mmu *mmu,
phys_addr_t start, unsigned long pages)
{
struct tlb_inv_context cxt;
unsigned long stride;
/*
* Since the range of addresses may not be mapped at
* the same level, assume the worst case as PAGE_SIZE
*/
stride = PAGE_SIZE;
start = round_down(start, stride);
dsb(ishst);
/* Switch to requested VMID */
__tlb_switch_to_guest(mmu, &cxt);
__flush_s2_tlb_range_op(ipas2e1is, start, pages, stride, 0);
dsb(ish);
__tlbi(vmalle1is);
dsb(ish);
isb();
__tlb_switch_to_host(&cxt);
}
void __kvm_tlb_flush_vmid(struct kvm_s2_mmu *mmu)
{
struct tlb_inv_context cxt;

104
arch/arm64/kvm/mmu.c
View File

@ -161,15 +161,23 @@ static bool memslot_is_logging(struct kvm_memory_slot *memslot)
}
/**
* kvm_flush_remote_tlbs() - flush all VM TLB entries for v7/8
* kvm_arch_flush_remote_tlbs() - flush all VM TLB entries for v7/8
* @kvm: pointer to kvm structure.
*
* Interface to HYP function to flush all VM TLB entries
*/
void kvm_flush_remote_tlbs(struct kvm *kvm)
int kvm_arch_flush_remote_tlbs(struct kvm *kvm)
{
++kvm->stat.generic.remote_tlb_flush_requests;
kvm_call_hyp(__kvm_tlb_flush_vmid, &kvm->arch.mmu);
return 0;
}
int kvm_arch_flush_remote_tlbs_range(struct kvm *kvm,
gfn_t gfn, u64 nr_pages)
{
kvm_tlb_flush_vmid_range(&kvm->arch.mmu,
gfn << PAGE_SHIFT, nr_pages << PAGE_SHIFT);
return 0;
}
static bool kvm_is_device_pfn(unsigned long pfn)
@ -592,6 +600,25 @@ int create_hyp_mappings(void *from, void *to, enum kvm_pgtable_prot prot)
return 0;
}
static int __hyp_alloc_private_va_range(unsigned long base)
{
lockdep_assert_held(&kvm_hyp_pgd_mutex);
if (!PAGE_ALIGNED(base))
return -EINVAL;
/*
* Verify that BIT(VA_BITS - 1) hasn't been flipped by
* allocating the new area, as it would indicate we've
* overflowed the idmap/IO address range.
*/
if ((base ^ io_map_base) & BIT(VA_BITS - 1))
return -ENOMEM;
io_map_base = base;
return 0;
}
/**
* hyp_alloc_private_va_range - Allocates a private VA range.
@ -612,26 +639,16 @@ int hyp_alloc_private_va_range(size_t size, unsigned long *haddr)
/*
* This assumes that we have enough space below the idmap
* page to allocate our VAs. If not, the check below will
* kick. A potential alternative would be to detect that
* overflow and switch to an allocation above the idmap.
* page to allocate our VAs. If not, the check in
* __hyp_alloc_private_va_range() will kick. A potential
* alternative would be to detect that overflow and switch
* to an allocation above the idmap.
*
* The allocated size is always a multiple of PAGE_SIZE.
*/
base = io_map_base - PAGE_ALIGN(size);
/* Align the allocation based on the order of its size */
base = ALIGN_DOWN(base, PAGE_SIZE << get_order(size));
/*
* Verify that BIT(VA_BITS - 1) hasn't been flipped by
* allocating the new area, as it would indicate we've
* overflowed the idmap/IO address range.
*/
if ((base ^ io_map_base) & BIT(VA_BITS - 1))
ret = -ENOMEM;
else
*haddr = io_map_base = base;
size = PAGE_ALIGN(size);
base = io_map_base - size;
ret = __hyp_alloc_private_va_range(base);
mutex_unlock(&kvm_hyp_pgd_mutex);
@ -668,6 +685,48 @@ static int __create_hyp_private_mapping(phys_addr_t phys_addr, size_t size,
return ret;
}
int create_hyp_stack(phys_addr_t phys_addr, unsigned long *haddr)
{
unsigned long base;
size_t size;
int ret;
mutex_lock(&kvm_hyp_pgd_mutex);
/*
* Efficient stack verification using the PAGE_SHIFT bit implies
* an alignment of our allocation on the order of the size.
*/
size = PAGE_SIZE * 2;
base = ALIGN_DOWN(io_map_base - size, size);
ret = __hyp_alloc_private_va_range(base);
mutex_unlock(&kvm_hyp_pgd_mutex);
if (ret) {
kvm_err("Cannot allocate hyp stack guard page\n");
return ret;
}
/*
* Since the stack grows downwards, map the stack to the page
* at the higher address and leave the lower guard page
* unbacked.
*
* Any valid stack address now has the PAGE_SHIFT bit as 1
* and addresses corresponding to the guard page have the
* PAGE_SHIFT bit as 0 - this is used for overflow detection.
*/
ret = __create_hyp_mappings(base + PAGE_SIZE, PAGE_SIZE, phys_addr,
PAGE_HYP);
if (ret)
kvm_err("Cannot map hyp stack\n");
*haddr = base + size;
return ret;
}
/**
* create_hyp_io_mappings - Map IO into both kernel and HYP
* @phys_addr: The physical start address which gets mapped
@ -1075,7 +1134,7 @@ static void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot)
write_lock(&kvm->mmu_lock);
stage2_wp_range(&kvm->arch.mmu, start, end);
write_unlock(&kvm->mmu_lock);
kvm_flush_remote_tlbs(kvm);
kvm_flush_remote_tlbs_memslot(kvm, memslot);
}
/**
@ -1541,7 +1600,6 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
out_unlock:
read_unlock(&kvm->mmu_lock);
kvm_set_pfn_accessed(pfn);
kvm_release_pfn_clean(pfn);
return ret != -EAGAIN ? ret : 0;
}
@ -1721,7 +1779,7 @@ bool kvm_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range)
bool kvm_set_spte_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
{
kvm_pfn_t pfn = pte_pfn(range->pte);
kvm_pfn_t pfn = pte_pfn(range->arg.pte);
if (!kvm->arch.mmu.pgt)
return false;

11
arch/arm64/kvm/nested.c
View File

@ -71,8 +71,9 @@ void access_nested_id_reg(struct kvm_vcpu *v, struct sys_reg_params *p,
break;
case SYS_ID_AA64MMFR0_EL1:
/* Hide ECV, FGT, ExS, Secure Memory */
val &= ~(GENMASK_ULL(63, 43) |
/* Hide ECV, ExS, Secure Memory */
val &= ~(NV_FTR(MMFR0, ECV) |
NV_FTR(MMFR0, EXS) |
NV_FTR(MMFR0, TGRAN4_2) |
NV_FTR(MMFR0, TGRAN16_2) |
NV_FTR(MMFR0, TGRAN64_2) |
@ -116,7 +117,8 @@ void access_nested_id_reg(struct kvm_vcpu *v, struct sys_reg_params *p,
break;
case SYS_ID_AA64MMFR1_EL1:
val &= (NV_FTR(MMFR1, PAN) |
val &= (NV_FTR(MMFR1, HCX) |
NV_FTR(MMFR1, PAN) |
NV_FTR(MMFR1, LO) |
NV_FTR(MMFR1, HPDS) |
NV_FTR(MMFR1, VH) |
@ -124,8 +126,7 @@ void access_nested_id_reg(struct kvm_vcpu *v, struct sys_reg_params *p,
break;
case SYS_ID_AA64MMFR2_EL1:
val &= ~(NV_FTR(MMFR2, EVT) |
NV_FTR(MMFR2, BBM) |
val &= ~(NV_FTR(MMFR2, BBM) |
NV_FTR(MMFR2, TTL) |
GENMASK_ULL(47, 44) |
NV_FTR(MMFR2, ST) |

37
arch/arm64/kvm/pmu-emul.c
View File

@ -14,6 +14,7 @@
#include <asm/kvm_emulate.h>
#include <kvm/arm_pmu.h>
#include <kvm/arm_vgic.h>
#include <asm/arm_pmuv3.h>
#define PERF_ATTR_CFG1_COUNTER_64BIT BIT(0)
@ -35,12 +36,8 @@ static struct kvm_pmc *kvm_vcpu_idx_to_pmc(struct kvm_vcpu *vcpu, int cnt_idx)
return &vcpu->arch.pmu.pmc[cnt_idx];
}
static u32 kvm_pmu_event_mask(struct kvm *kvm)
static u32 __kvm_pmu_event_mask(unsigned int pmuver)
{
unsigned int pmuver;
pmuver = kvm->arch.arm_pmu->pmuver;
switch (pmuver) {
case ID_AA64DFR0_EL1_PMUVer_IMP:
return GENMASK(9, 0);
@ -55,6 +52,14 @@ static u32 kvm_pmu_event_mask(struct kvm *kvm)
}
}
static u32 kvm_pmu_event_mask(struct kvm *kvm)
{
u64 dfr0 = IDREG(kvm, SYS_ID_AA64DFR0_EL1);
u8 pmuver = SYS_FIELD_GET(ID_AA64DFR0_EL1, PMUVer, dfr0);
return __kvm_pmu_event_mask(pmuver);
}
/**
* kvm_pmc_is_64bit - determine if counter is 64bit
* @pmc: counter context
@ -672,8 +677,11 @@ void kvm_host_pmu_init(struct arm_pmu *pmu)
{
struct arm_pmu_entry *entry;
if (pmu->pmuver == ID_AA64DFR0_EL1_PMUVer_NI ||
pmu->pmuver == ID_AA64DFR0_EL1_PMUVer_IMP_DEF)
/*
* Check the sanitised PMU version for the system, as KVM does not
* support implementations where PMUv3 exists on a subset of CPUs.
*/
if (!pmuv3_implemented(kvm_arm_pmu_get_pmuver_limit()))
return;
mutex_lock(&arm_pmus_lock);
@ -750,11 +758,12 @@ u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1)
} else {
val = read_sysreg(pmceid1_el0);
/*
* Don't advertise STALL_SLOT, as PMMIR_EL0 is handled
* Don't advertise STALL_SLOT*, as PMMIR_EL0 is handled
* as RAZ
*/
if (vcpu->kvm->arch.arm_pmu->pmuver >= ID_AA64DFR0_EL1_PMUVer_V3P4)
val &= ~BIT_ULL(ARMV8_PMUV3_PERFCTR_STALL_SLOT - 32);
val &= ~(BIT_ULL(ARMV8_PMUV3_PERFCTR_STALL_SLOT - 32) |
BIT_ULL(ARMV8_PMUV3_PERFCTR_STALL_SLOT_FRONTEND - 32) |
BIT_ULL(ARMV8_PMUV3_PERFCTR_STALL_SLOT_BACKEND - 32));
base = 32;
}
@ -950,11 +959,17 @@ int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr)
return 0;
}
case KVM_ARM_VCPU_PMU_V3_FILTER: {
u8 pmuver = kvm_arm_pmu_get_pmuver_limit();
struct kvm_pmu_event_filter __user *uaddr;
struct kvm_pmu_event_filter filter;
int nr_events;
nr_events = kvm_pmu_event_mask(kvm) + 1;
/*
* Allow userspace to specify an event filter for the entire
* event range supported by PMUVer of the hardware, rather
* than the guest's PMUVer for KVM backward compatibility.
*/
nr_events = __kvm_pmu_event_mask(pmuver) + 1;
uaddr = (struct kvm_pmu_event_filter __user *)(long)attr->addr;

18
arch/arm64/kvm/pmu.c
View File

@ -236,3 +236,21 @@ bool kvm_set_pmuserenr(u64 val)
ctxt_sys_reg(hctxt, PMUSERENR_EL0) = val;
return true;
}
/*
* If we interrupted the guest to update the host PMU context, make
* sure we re-apply the guest EL0 state.
*/
void kvm_vcpu_pmu_resync_el0(void)
{
struct kvm_vcpu *vcpu;
if (!has_vhe() || !in_interrupt())
return;
vcpu = kvm_get_running_vcpu();
if (!vcpu)
return;
kvm_make_request(KVM_REQ_RESYNC_PMU_EL0, vcpu);
}

23
arch/arm64/kvm/reset.c
View File

@ -248,21 +248,16 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
}
}
switch (vcpu->arch.target) {
default:
if (vcpu_el1_is_32bit(vcpu)) {
pstate = VCPU_RESET_PSTATE_SVC;
} else if (vcpu_has_nv(vcpu)) {
pstate = VCPU_RESET_PSTATE_EL2;
} else {
pstate = VCPU_RESET_PSTATE_EL1;
}
if (vcpu_el1_is_32bit(vcpu))
pstate = VCPU_RESET_PSTATE_SVC;
else if (vcpu_has_nv(vcpu))
pstate = VCPU_RESET_PSTATE_EL2;
else
pstate = VCPU_RESET_PSTATE_EL1;
if (kvm_vcpu_has_pmu(vcpu) && !kvm_arm_support_pmu_v3()) {
ret = -EINVAL;
goto out;
}
break;
if (kvm_vcpu_has_pmu(vcpu) && !kvm_arm_support_pmu_v3()) {
ret = -EINVAL;
goto out;
}
/* Reset core registers */

15
arch/arm64/kvm/sys_regs.c
View File

@ -2151,6 +2151,8 @@ static const struct sys_reg_desc sys_reg_descs[] = {
{ SYS_DESC(SYS_CONTEXTIDR_EL1), access_vm_reg, reset_val, CONTEXTIDR_EL1, 0 },
{ SYS_DESC(SYS_TPIDR_EL1), NULL, reset_unknown, TPIDR_EL1 },
{ SYS_DESC(SYS_ACCDATA_EL1), undef_access },
{ SYS_DESC(SYS_SCXTNUM_EL1), undef_access },
{ SYS_DESC(SYS_CNTKCTL_EL1), NULL, reset_val, CNTKCTL_EL1, 0},
@ -2365,8 +2367,13 @@ static const struct sys_reg_desc sys_reg_descs[] = {
EL2_REG(MDCR_EL2, access_rw, reset_val, 0),
EL2_REG(CPTR_EL2, access_rw, reset_val, CPTR_NVHE_EL2_RES1),
EL2_REG(HSTR_EL2, access_rw, reset_val, 0),
EL2_REG(HFGRTR_EL2, access_rw, reset_val, 0),
EL2_REG(HFGWTR_EL2, access_rw, reset_val, 0),
EL2_REG(HFGITR_EL2, access_rw, reset_val, 0),
EL2_REG(HACR_EL2, access_rw, reset_val, 0),
EL2_REG(HCRX_EL2, access_rw, reset_val, 0),
EL2_REG(TTBR0_EL2, access_rw, reset_val, 0),
EL2_REG(TTBR1_EL2, access_rw, reset_val, 0),
EL2_REG(TCR_EL2, access_rw, reset_val, TCR_EL2_RES1),
@ -2374,6 +2381,8 @@ static const struct sys_reg_desc sys_reg_descs[] = {
EL2_REG(VTCR_EL2, access_rw, reset_val, 0),
{ SYS_DESC(SYS_DACR32_EL2), NULL, reset_unknown, DACR32_EL2 },
EL2_REG(HDFGRTR_EL2, access_rw, reset_val, 0),
EL2_REG(HDFGWTR_EL2, access_rw, reset_val, 0),
EL2_REG(SPSR_EL2, access_rw, reset_val, 0),
EL2_REG(ELR_EL2, access_rw, reset_val, 0),
{ SYS_DESC(SYS_SP_EL1), access_sp_el1},
@ -3170,6 +3179,9 @@ int kvm_handle_sys_reg(struct kvm_vcpu *vcpu)
trace_kvm_handle_sys_reg(esr);
if (__check_nv_sr_forward(vcpu))
return 1;
params = esr_sys64_to_params(esr);
params.regval = vcpu_get_reg(vcpu, Rt);
@ -3587,5 +3599,8 @@ int __init kvm_sys_reg_table_init(void)
if (!first_idreg)
return -EINVAL;
if (kvm_get_mode() == KVM_MODE_NV)
return populate_nv_trap_config();
return 0;
}

26
arch/arm64/kvm/trace_arm.h
View File

@ -364,6 +364,32 @@ TRACE_EVENT(kvm_inject_nested_exception,
__entry->hcr_el2)
);
TRACE_EVENT(kvm_forward_sysreg_trap,
TP_PROTO(struct kvm_vcpu *vcpu, u32 sysreg, bool is_read),
TP_ARGS(vcpu, sysreg, is_read),
TP_STRUCT__entry(
__field(u64, pc)
__field(u32, sysreg)
__field(bool, is_read)
),
TP_fast_assign(
__entry->pc = *vcpu_pc(vcpu);
__entry->sysreg = sysreg;
__entry->is_read = is_read;
),
TP_printk("%llx %c (%d,%d,%d,%d,%d)",
__entry->pc,
__entry->is_read ? 'R' : 'W',
sys_reg_Op0(__entry->sysreg),
sys_reg_Op1(__entry->sysreg),
sys_reg_CRn(__entry->sysreg),
sys_reg_CRm(__entry->sysreg),
sys_reg_Op2(__entry->sysreg))
);
#endif /* _TRACE_ARM_ARM64_KVM_H */
#undef TRACE_INCLUDE_PATH

2
arch/arm64/kvm/vgic/vgic.h
View File

@ -199,7 +199,6 @@ void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu);
void vgic_v2_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
void vgic_v2_clear_lr(struct kvm_vcpu *vcpu, int lr);
void vgic_v2_set_underflow(struct kvm_vcpu *vcpu);
void vgic_v2_set_npie(struct kvm_vcpu *vcpu);
int vgic_v2_has_attr_regs(struct kvm_device *dev, struct kvm_device_attr *attr);
int vgic_v2_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
int offset, u32 *val);
@ -233,7 +232,6 @@ void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu);
void vgic_v3_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
void vgic_v3_clear_lr(struct kvm_vcpu *vcpu, int lr);
void vgic_v3_set_underflow(struct kvm_vcpu *vcpu);
void vgic_v3_set_npie(struct kvm_vcpu *vcpu);
void vgic_v3_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
void vgic_v3_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
void vgic_v3_enable(struct kvm_vcpu *vcpu);

1
arch/arm64/tools/cpucaps
View File

@ -26,6 +26,7 @@ HAS_ECV
HAS_ECV_CNTPOFF
HAS_EPAN
HAS_EVT
HAS_FGT
HAS_GENERIC_AUTH
HAS_GENERIC_AUTH_ARCH_QARMA3
HAS_GENERIC_AUTH_ARCH_QARMA5

129
arch/arm64/tools/sysreg
View File

@ -2156,6 +2156,135 @@ Field 1 ICIALLU
Field 0 ICIALLUIS
EndSysreg
Sysreg HDFGRTR_EL2 3 4 3 1 4
Field 63 PMBIDR_EL1
Field 62 nPMSNEVFR_EL1
Field 61 nBRBDATA
Field 60 nBRBCTL
Field 59 nBRBIDR
Field 58 PMCEIDn_EL0
Field 57 PMUSERENR_EL0
Field 56 TRBTRG_EL1
Field 55 TRBSR_EL1
Field 54 TRBPTR_EL1
Field 53 TRBMAR_EL1
Field 52 TRBLIMITR_EL1
Field 51 TRBIDR_EL1
Field 50 TRBBASER_EL1
Res0 49
Field 48 TRCVICTLR
Field 47 TRCSTATR
Field 46 TRCSSCSRn
Field 45 TRCSEQSTR
Field 44 TRCPRGCTLR
Field 43 TRCOSLSR
Res0 42
Field 41 TRCIMSPECn
Field 40 TRCID
Res0 39:38
Field 37 TRCCNTVRn
Field 36 TRCCLAIM
Field 35 TRCAUXCTLR
Field 34 TRCAUTHSTATUS
Field 33 TRC
Field 32 PMSLATFR_EL1
Field 31 PMSIRR_EL1
Field 30 PMSIDR_EL1
Field 29 PMSICR_EL1
Field 28 PMSFCR_EL1
Field 27 PMSEVFR_EL1
Field 26 PMSCR_EL1
Field 25 PMBSR_EL1
Field 24 PMBPTR_EL1
Field 23 PMBLIMITR_EL1
Field 22 PMMIR_EL1
Res0 21:20
Field 19 PMSELR_EL0
Field 18 PMOVS
Field 17 PMINTEN
Field 16 PMCNTEN
Field 15 PMCCNTR_EL0
Field 14 PMCCFILTR_EL0
Field 13 PMEVTYPERn_EL0
Field 12 PMEVCNTRn_EL0
Field 11 OSDLR_EL1
Field 10 OSECCR_EL1
Field 9 OSLSR_EL1
Res0 8
Field 7 DBGPRCR_EL1
Field 6 DBGAUTHSTATUS_EL1
Field 5 DBGCLAIM
Field 4 MDSCR_EL1
Field 3 DBGWVRn_EL1
Field 2 DBGWCRn_EL1
Field 1 DBGBVRn_EL1
Field 0 DBGBCRn_EL1
EndSysreg
Sysreg HDFGWTR_EL2 3 4 3 1 5
Res0 63
Field 62 nPMSNEVFR_EL1
Field 61 nBRBDATA
Field 60 nBRBCTL
Res0 59:58
Field 57 PMUSERENR_EL0
Field 56 TRBTRG_EL1
Field 55 TRBSR_EL1
Field 54 TRBPTR_EL1
Field 53 TRBMAR_EL1
Field 52 TRBLIMITR_EL1
Res0 51
Field 50 TRBBASER_EL1
Field 49 TRFCR_EL1
Field 48 TRCVICTLR
Res0 47
Field 46 TRCSSCSRn
Field 45 TRCSEQSTR
Field 44 TRCPRGCTLR
Res0 43
Field 42 TRCOSLAR
Field 41 TRCIMSPECn
Res0 40:38
Field 37 TRCCNTVRn
Field 36 TRCCLAIM
Field 35 TRCAUXCTLR
Res0 34
Field 33 TRC
Field 32 PMSLATFR_EL1
Field 31 PMSIRR_EL1
Res0 30
Field 29 PMSICR_EL1
Field 28 PMSFCR_EL1
Field 27 PMSEVFR_EL1
Field 26 PMSCR_EL1
Field 25 PMBSR_EL1
Field 24 PMBPTR_EL1
Field 23 PMBLIMITR_EL1
Res0 22
Field 21 PMCR_EL0
Field 20 PMSWINC_EL0
Field 19 PMSELR_EL0
Field 18 PMOVS
Field 17 PMINTEN
Field 16 PMCNTEN
Field 15 PMCCNTR_EL0
Field 14 PMCCFILTR_EL0
Field 13 PMEVTYPERn_EL0
Field 12 PMEVCNTRn_EL0
Field 11 OSDLR_EL1
Field 10 OSECCR_EL1
Res0 9
Field 8 OSLAR_EL1
Field 7 DBGPRCR_EL1
Res0 6
Field 5 DBGCLAIM
Field 4 MDSCR_EL1
Field 3 DBGWVRn_EL1
Field 2 DBGWCRn_EL1
Field 1 DBGBVRn_EL1
Field 0 DBGBCRn_EL1
EndSysreg
Sysreg ZCR_EL2 3 4 1 2 0
Fields ZCR_ELx
EndSysreg

3
arch/mips/include/asm/kvm_host.h
View File

@ -896,7 +896,6 @@ static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB
int kvm_arch_flush_remote_tlb(struct kvm *kvm);
#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS
#endif /* __MIPS_KVM_HOST_H__ */

12
arch/mips/kvm/mips.c
View File

@ -199,7 +199,7 @@ void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
/* Flush slot from GPA */
kvm_mips_flush_gpa_pt(kvm, slot->base_gfn,
slot->base_gfn + slot->npages - 1);
kvm_arch_flush_remote_tlbs_memslot(kvm, slot);
kvm_flush_remote_tlbs_memslot(kvm, slot);
spin_unlock(&kvm->mmu_lock);
}
@ -235,7 +235,7 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
needs_flush = kvm_mips_mkclean_gpa_pt(kvm, new->base_gfn,
new->base_gfn + new->npages - 1);
if (needs_flush)
kvm_arch_flush_remote_tlbs_memslot(kvm, new);
kvm_flush_remote_tlbs_memslot(kvm, new);
spin_unlock(&kvm->mmu_lock);
}
}
@ -981,18 +981,12 @@ void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
}
int kvm_arch_flush_remote_tlb(struct kvm *kvm)
int kvm_arch_flush_remote_tlbs(struct kvm *kvm)
{
kvm_mips_callbacks->prepare_flush_shadow(kvm);
return 1;
}
void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm,
const struct kvm_memory_slot *memslot)
{
kvm_flush_remote_tlbs(kvm);
}
int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
{
int r;

2
arch/mips/kvm/mmu.c
View File

@ -447,7 +447,7 @@ bool kvm_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range)
bool kvm_set_spte_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
{
gpa_t gpa = range->start << PAGE_SHIFT;
pte_t hva_pte = range->pte;
pte_t hva_pte = range->arg.pte;
pte_t *gpa_pte = kvm_mips_pte_for_gpa(kvm, NULL, gpa);
pte_t old_pte;

2
arch/riscv/include/asm/csr.h
View File

@ -54,6 +54,7 @@
#ifndef CONFIG_64BIT
#define SATP_PPN _AC(0x003FFFFF, UL)
#define SATP_MODE_32 _AC(0x80000000, UL)
#define SATP_MODE_SHIFT 31
#define SATP_ASID_BITS 9
#define SATP_ASID_SHIFT 22
#define SATP_ASID_MASK _AC(0x1FF, UL)
@ -62,6 +63,7 @@
#define SATP_MODE_39 _AC(0x8000000000000000, UL)
#define SATP_MODE_48 _AC(0x9000000000000000, UL)
#define SATP_MODE_57 _AC(0xa000000000000000, UL)
#define SATP_MODE_SHIFT 60
#define SATP_ASID_BITS 16
#define SATP_ASID_SHIFT 44
#define SATP_ASID_MASK _AC(0xFFFF, UL)

9
arch/riscv/include/asm/kvm_host.h
View File

@ -337,6 +337,15 @@ int kvm_riscv_vcpu_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
void __kvm_riscv_switch_to(struct kvm_vcpu_arch *vcpu_arch);
void kvm_riscv_vcpu_setup_isa(struct kvm_vcpu *vcpu);
unsigned long kvm_riscv_vcpu_num_regs(struct kvm_vcpu *vcpu);
int kvm_riscv_vcpu_copy_reg_indices(struct kvm_vcpu *vcpu,
u64 __user *uindices);
int kvm_riscv_vcpu_get_reg(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg);
int kvm_riscv_vcpu_set_reg(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg);
int kvm_riscv_vcpu_set_interrupt(struct kvm_vcpu *vcpu, unsigned int irq);
int kvm_riscv_vcpu_unset_interrupt(struct kvm_vcpu *vcpu, unsigned int irq);
void kvm_riscv_vcpu_flush_interrupts(struct kvm_vcpu *vcpu);

6
arch/riscv/include/asm/kvm_vcpu_vector.h
View File

@ -74,9 +74,7 @@ static inline void kvm_riscv_vcpu_free_vector_context(struct kvm_vcpu *vcpu)
#endif
int kvm_riscv_vcpu_get_reg_vector(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg,
unsigned long rtype);
const struct kvm_one_reg *reg);
int kvm_riscv_vcpu_set_reg_vector(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg,
unsigned long rtype);
const struct kvm_one_reg *reg);
#endif

16
arch/riscv/include/uapi/asm/kvm.h
View File

@ -55,6 +55,7 @@ struct kvm_riscv_config {
unsigned long marchid;
unsigned long mimpid;
unsigned long zicboz_block_size;
unsigned long satp_mode;
};
/* CORE registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
@ -124,6 +125,12 @@ enum KVM_RISCV_ISA_EXT_ID {
KVM_RISCV_ISA_EXT_SSAIA,
KVM_RISCV_ISA_EXT_V,
KVM_RISCV_ISA_EXT_SVNAPOT,
KVM_RISCV_ISA_EXT_ZBA,
KVM_RISCV_ISA_EXT_ZBS,
KVM_RISCV_ISA_EXT_ZICNTR,
KVM_RISCV_ISA_EXT_ZICSR,
KVM_RISCV_ISA_EXT_ZIFENCEI,
KVM_RISCV_ISA_EXT_ZIHPM,
KVM_RISCV_ISA_EXT_MAX,
};
@ -193,6 +200,15 @@ enum KVM_RISCV_SBI_EXT_ID {
/* ISA Extension registers are mapped as type 7 */
#define KVM_REG_RISCV_ISA_EXT (0x07 << KVM_REG_RISCV_TYPE_SHIFT)
#define KVM_REG_RISCV_ISA_SINGLE (0x0 << KVM_REG_RISCV_SUBTYPE_SHIFT)
#define KVM_REG_RISCV_ISA_MULTI_EN (0x1 << KVM_REG_RISCV_SUBTYPE_SHIFT)
#define KVM_REG_RISCV_ISA_MULTI_DIS (0x2 << KVM_REG_RISCV_SUBTYPE_SHIFT)
#define KVM_REG_RISCV_ISA_MULTI_REG(__ext_id) \
((__ext_id) / __BITS_PER_LONG)
#define KVM_REG_RISCV_ISA_MULTI_MASK(__ext_id) \
(1UL << ((__ext_id) % __BITS_PER_LONG))
#define KVM_REG_RISCV_ISA_MULTI_REG_LAST \
KVM_REG_RISCV_ISA_MULTI_REG(KVM_RISCV_ISA_EXT_MAX - 1)
/* SBI extension registers are mapped as type 8 */
#define KVM_REG_RISCV_SBI_EXT (0x08 << KVM_REG_RISCV_TYPE_SHIFT)

1
arch/riscv/kvm/Makefile
View File

@ -19,6 +19,7 @@ kvm-y += vcpu_exit.o
kvm-y += vcpu_fp.o
kvm-y += vcpu_vector.o
kvm-y += vcpu_insn.o
kvm-y += vcpu_onereg.o
kvm-y += vcpu_switch.o
kvm-y += vcpu_sbi.o
kvm-$(CONFIG_RISCV_SBI_V01) += vcpu_sbi_v01.o

4
arch/riscv/kvm/aia.c
View File

@ -176,7 +176,7 @@ int kvm_riscv_vcpu_aia_get_csr(struct kvm_vcpu *vcpu,
struct kvm_vcpu_aia_csr *csr = &vcpu->arch.aia_context.guest_csr;
if (reg_num >= sizeof(struct kvm_riscv_aia_csr) / sizeof(unsigned long))
return -EINVAL;
return -ENOENT;
*out_val = 0;
if (kvm_riscv_aia_available())
@ -192,7 +192,7 @@ int kvm_riscv_vcpu_aia_set_csr(struct kvm_vcpu *vcpu,
struct kvm_vcpu_aia_csr *csr = &vcpu->arch.aia_context.guest_csr;
if (reg_num >= sizeof(struct kvm_riscv_aia_csr) / sizeof(unsigned long))
return -EINVAL;
return -ENOENT;
if (kvm_riscv_aia_available()) {
((unsigned long *)csr)[reg_num] = val;

8
arch/riscv/kvm/mmu.c
View File

@ -406,12 +406,6 @@ void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
{
}
void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm,
const struct kvm_memory_slot *memslot)
{
kvm_flush_remote_tlbs(kvm);
}
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free)
{
}
@ -559,7 +553,7 @@ bool kvm_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range)
bool kvm_set_spte_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
{
int ret;
kvm_pfn_t pfn = pte_pfn(range->pte);
kvm_pfn_t pfn = pte_pfn(range->arg.pte);
if (!kvm->arch.pgd)
return false;

547
arch/riscv/kvm/vcpu.c
View File

@ -13,16 +13,12 @@
#include <linux/kdebug.h>
#include <linux/module.h>
#include <linux/percpu.h>
#include <linux/uaccess.h>
#include <linux/vmalloc.h>
#include <linux/sched/signal.h>
#include <linux/fs.h>
#include <linux/kvm_host.h>
#include <asm/csr.h>
#include <asm/cacheflush.h>
#include <asm/hwcap.h>
#include <asm/sbi.h>
#include <asm/vector.h>
#include <asm/kvm_vcpu_vector.h>
const struct _kvm_stats_desc kvm_vcpu_stats_desc[] = {
@ -46,79 +42,6 @@ const struct kvm_stats_header kvm_vcpu_stats_header = {
sizeof(kvm_vcpu_stats_desc),
};
#define KVM_RISCV_BASE_ISA_MASK GENMASK(25, 0)
#define KVM_ISA_EXT_ARR(ext) [KVM_RISCV_ISA_EXT_##ext] = RISCV_ISA_EXT_##ext
/* Mapping between KVM ISA Extension ID & Host ISA extension ID */
static const unsigned long kvm_isa_ext_arr[] = {
[KVM_RISCV_ISA_EXT_A] = RISCV_ISA_EXT_a,
[KVM_RISCV_ISA_EXT_C] = RISCV_ISA_EXT_c,
[KVM_RISCV_ISA_EXT_D] = RISCV_ISA_EXT_d,
[KVM_RISCV_ISA_EXT_F] = RISCV_ISA_EXT_f,
[KVM_RISCV_ISA_EXT_H] = RISCV_ISA_EXT_h,
[KVM_RISCV_ISA_EXT_I] = RISCV_ISA_EXT_i,
[KVM_RISCV_ISA_EXT_M] = RISCV_ISA_EXT_m,
[KVM_RISCV_ISA_EXT_V] = RISCV_ISA_EXT_v,
KVM_ISA_EXT_ARR(SSAIA),
KVM_ISA_EXT_ARR(SSTC),
KVM_ISA_EXT_ARR(SVINVAL),
KVM_ISA_EXT_ARR(SVNAPOT),
KVM_ISA_EXT_ARR(SVPBMT),
KVM_ISA_EXT_ARR(ZBB),
KVM_ISA_EXT_ARR(ZIHINTPAUSE),
KVM_ISA_EXT_ARR(ZICBOM),
KVM_ISA_EXT_ARR(ZICBOZ),
};
static unsigned long kvm_riscv_vcpu_base2isa_ext(unsigned long base_ext)
{
unsigned long i;
for (i = 0; i < KVM_RISCV_ISA_EXT_MAX; i++) {
if (kvm_isa_ext_arr[i] == base_ext)
return i;
}
return KVM_RISCV_ISA_EXT_MAX;
}
static bool kvm_riscv_vcpu_isa_enable_allowed(unsigned long ext)
{
switch (ext) {
case KVM_RISCV_ISA_EXT_H:
return false;
case KVM_RISCV_ISA_EXT_V:
return riscv_v_vstate_ctrl_user_allowed();
default:
break;
}
return true;
}
static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
{
switch (ext) {
case KVM_RISCV_ISA_EXT_A:
case KVM_RISCV_ISA_EXT_C:
case KVM_RISCV_ISA_EXT_I:
case KVM_RISCV_ISA_EXT_M:
case KVM_RISCV_ISA_EXT_SSAIA:
case KVM_RISCV_ISA_EXT_SSTC:
case KVM_RISCV_ISA_EXT_SVINVAL:
case KVM_RISCV_ISA_EXT_SVNAPOT:
case KVM_RISCV_ISA_EXT_ZIHINTPAUSE:
case KVM_RISCV_ISA_EXT_ZBB:
return false;
default:
break;
}
return true;
}
static void kvm_riscv_reset_vcpu(struct kvm_vcpu *vcpu)
{
struct kvm_vcpu_csr *csr = &vcpu->arch.guest_csr;
@ -176,7 +99,6 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
int rc;
struct kvm_cpu_context *cntx;
struct kvm_vcpu_csr *reset_csr = &vcpu->arch.guest_reset_csr;
unsigned long host_isa, i;
/* Mark this VCPU never ran */
vcpu->arch.ran_atleast_once = false;
@ -184,12 +106,7 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
bitmap_zero(vcpu->arch.isa, RISCV_ISA_EXT_MAX);
/* Setup ISA features available to VCPU */
for (i = 0; i < ARRAY_SIZE(kvm_isa_ext_arr); i++) {
host_isa = kvm_isa_ext_arr[i];
if (__riscv_isa_extension_available(NULL, host_isa) &&
kvm_riscv_vcpu_isa_enable_allowed(i))
set_bit(host_isa, vcpu->arch.isa);
}
kvm_riscv_vcpu_setup_isa(vcpu);
/* Setup vendor, arch, and implementation details */
vcpu->arch.mvendorid = sbi_get_mvendorid();
@ -294,450 +211,6 @@ vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
return VM_FAULT_SIGBUS;
}
static int kvm_riscv_vcpu_get_reg_config(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg)
{
unsigned long __user *uaddr =
(unsigned long __user *)(unsigned long)reg->addr;
unsigned long reg_num = reg->id & ~(KVM_REG_ARCH_MASK |
KVM_REG_SIZE_MASK |
KVM_REG_RISCV_CONFIG);
unsigned long reg_val;
if (KVM_REG_SIZE(reg->id) != sizeof(unsigned long))
return -EINVAL;
switch (reg_num) {
case KVM_REG_RISCV_CONFIG_REG(isa):
reg_val = vcpu->arch.isa[0] & KVM_RISCV_BASE_ISA_MASK;
break;
case KVM_REG_RISCV_CONFIG_REG(zicbom_block_size):
if (!riscv_isa_extension_available(vcpu->arch.isa, ZICBOM))
return -EINVAL;
reg_val = riscv_cbom_block_size;
break;
case KVM_REG_RISCV_CONFIG_REG(zicboz_block_size):
if (!riscv_isa_extension_available(vcpu->arch.isa, ZICBOZ))
return -EINVAL;
reg_val = riscv_cboz_block_size;
break;
case KVM_REG_RISCV_CONFIG_REG(mvendorid):
reg_val = vcpu->arch.mvendorid;
break;
case KVM_REG_RISCV_CONFIG_REG(marchid):
reg_val = vcpu->arch.marchid;
break;
case KVM_REG_RISCV_CONFIG_REG(mimpid):
reg_val = vcpu->arch.mimpid;
break;
default:
return -EINVAL;
}
if (copy_to_user(uaddr, &reg_val, KVM_REG_SIZE(reg->id)))
return -EFAULT;
return 0;
}
static int kvm_riscv_vcpu_set_reg_config(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg)
{
unsigned long __user *uaddr =
(unsigned long __user *)(unsigned long)reg->addr;
unsigned long reg_num = reg->id & ~(KVM_REG_ARCH_MASK |
KVM_REG_SIZE_MASK |
KVM_REG_RISCV_CONFIG);
unsigned long i, isa_ext, reg_val;
if (KVM_REG_SIZE(reg->id) != sizeof(unsigned long))
return -EINVAL;
if (copy_from_user(&reg_val, uaddr, KVM_REG_SIZE(reg->id)))
return -EFAULT;
switch (reg_num) {
case KVM_REG_RISCV_CONFIG_REG(isa):
/*
* This ONE REG interface is only defined for
* single letter extensions.
*/
if (fls(reg_val) >= RISCV_ISA_EXT_BASE)
return -EINVAL;
if (!vcpu->arch.ran_atleast_once) {
/* Ignore the enable/disable request for certain extensions */
for (i = 0; i < RISCV_ISA_EXT_BASE; i++) {
isa_ext = kvm_riscv_vcpu_base2isa_ext(i);
if (isa_ext >= KVM_RISCV_ISA_EXT_MAX) {
reg_val &= ~BIT(i);
continue;
}
if (!kvm_riscv_vcpu_isa_enable_allowed(isa_ext))
if (reg_val & BIT(i))
reg_val &= ~BIT(i);
if (!kvm_riscv_vcpu_isa_disable_allowed(isa_ext))
if (!(reg_val & BIT(i)))
reg_val |= BIT(i);
}
reg_val &= riscv_isa_extension_base(NULL);
/* Do not modify anything beyond single letter extensions */
reg_val = (vcpu->arch.isa[0] & ~KVM_RISCV_BASE_ISA_MASK) |
(reg_val & KVM_RISCV_BASE_ISA_MASK);
vcpu->arch.isa[0] = reg_val;
kvm_riscv_vcpu_fp_reset(vcpu);
} else {
return -EOPNOTSUPP;
}
break;
case KVM_REG_RISCV_CONFIG_REG(zicbom_block_size):
return -EOPNOTSUPP;
case KVM_REG_RISCV_CONFIG_REG(zicboz_block_size):
return -EOPNOTSUPP;
case KVM_REG_RISCV_CONFIG_REG(mvendorid):
if (!vcpu->arch.ran_atleast_once)
vcpu->arch.mvendorid = reg_val;
else
return -EBUSY;
break;
case KVM_REG_RISCV_CONFIG_REG(marchid):
if (!vcpu->arch.ran_atleast_once)
vcpu->arch.marchid = reg_val;
else
return -EBUSY;
break;
case KVM_REG_RISCV_CONFIG_REG(mimpid):
if (!vcpu->arch.ran_atleast_once)
vcpu->arch.mimpid = reg_val;
else
return -EBUSY;
break;
default:
return -EINVAL;
}
return 0;
}
static int kvm_riscv_vcpu_get_reg_core(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg)
{
struct kvm_cpu_context *cntx = &vcpu->arch.guest_context;
unsigned long __user *uaddr =
(unsigned long __user *)(unsigned long)reg->addr;
unsigned long reg_num = reg->id & ~(KVM_REG_ARCH_MASK |
KVM_REG_SIZE_MASK |
KVM_REG_RISCV_CORE);
unsigned long reg_val;
if (KVM_REG_SIZE(reg->id) != sizeof(unsigned long))
return -EINVAL;
if (reg_num >= sizeof(struct kvm_riscv_core) / sizeof(unsigned long))
return -EINVAL;
if (reg_num == KVM_REG_RISCV_CORE_REG(regs.pc))
reg_val = cntx->sepc;
else if (KVM_REG_RISCV_CORE_REG(regs.pc) < reg_num &&
reg_num <= KVM_REG_RISCV_CORE_REG(regs.t6))
reg_val = ((unsigned long *)cntx)[reg_num];
else if (reg_num == KVM_REG_RISCV_CORE_REG(mode))
reg_val = (cntx->sstatus & SR_SPP) ?
KVM_RISCV_MODE_S : KVM_RISCV_MODE_U;
else
return -EINVAL;
if (copy_to_user(uaddr, &reg_val, KVM_REG_SIZE(reg->id)))
return -EFAULT;
return 0;
}
static int kvm_riscv_vcpu_set_reg_core(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg)
{
struct kvm_cpu_context *cntx = &vcpu->arch.guest_context;
unsigned long __user *uaddr =
(unsigned long __user *)(unsigned long)reg->addr;
unsigned long reg_num = reg->id & ~(KVM_REG_ARCH_MASK |
KVM_REG_SIZE_MASK |
KVM_REG_RISCV_CORE);
unsigned long reg_val;
if (KVM_REG_SIZE(reg->id) != sizeof(unsigned long))
return -EINVAL;
if (reg_num >= sizeof(struct kvm_riscv_core) / sizeof(unsigned long))
return -EINVAL;
if (copy_from_user(&reg_val, uaddr, KVM_REG_SIZE(reg->id)))
return -EFAULT;
if (reg_num == KVM_REG_RISCV_CORE_REG(regs.pc))
cntx->sepc = reg_val;
else if (KVM_REG_RISCV_CORE_REG(regs.pc) < reg_num &&
reg_num <= KVM_REG_RISCV_CORE_REG(regs.t6))
((unsigned long *)cntx)[reg_num] = reg_val;
else if (reg_num == KVM_REG_RISCV_CORE_REG(mode)) {
if (reg_val == KVM_RISCV_MODE_S)
cntx->sstatus |= SR_SPP;
else
cntx->sstatus &= ~SR_SPP;
} else
return -EINVAL;
return 0;
}
static int kvm_riscv_vcpu_general_get_csr(struct kvm_vcpu *vcpu,
unsigned long reg_num,
unsigned long *out_val)
{
struct kvm_vcpu_csr *csr = &vcpu->arch.guest_csr;
if (reg_num >= sizeof(struct kvm_riscv_csr) / sizeof(unsigned long))
return -EINVAL;
if (reg_num == KVM_REG_RISCV_CSR_REG(sip)) {
kvm_riscv_vcpu_flush_interrupts(vcpu);
*out_val = (csr->hvip >> VSIP_TO_HVIP_SHIFT) & VSIP_VALID_MASK;
*out_val |= csr->hvip & ~IRQ_LOCAL_MASK;
} else
*out_val = ((unsigned long *)csr)[reg_num];
return 0;
}
static inline int kvm_riscv_vcpu_general_set_csr(struct kvm_vcpu *vcpu,
unsigned long reg_num,
unsigned long reg_val)
{
struct kvm_vcpu_csr *csr = &vcpu->arch.guest_csr;
if (reg_num >= sizeof(struct kvm_riscv_csr) / sizeof(unsigned long))
return -EINVAL;
if (reg_num == KVM_REG_RISCV_CSR_REG(sip)) {
reg_val &= VSIP_VALID_MASK;
reg_val <<= VSIP_TO_HVIP_SHIFT;
}
((unsigned long *)csr)[reg_num] = reg_val;
if (reg_num == KVM_REG_RISCV_CSR_REG(sip))
WRITE_ONCE(vcpu->arch.irqs_pending_mask[0], 0);
return 0;
}
static int kvm_riscv_vcpu_get_reg_csr(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg)
{
int rc;
unsigned long __user *uaddr =
(unsigned long __user *)(unsigned long)reg->addr;
unsigned long reg_num = reg->id & ~(KVM_REG_ARCH_MASK |
KVM_REG_SIZE_MASK |
KVM_REG_RISCV_CSR);
unsigned long reg_val, reg_subtype;
if (KVM_REG_SIZE(reg->id) != sizeof(unsigned long))
return -EINVAL;
reg_subtype = reg_num & KVM_REG_RISCV_SUBTYPE_MASK;
reg_num &= ~KVM_REG_RISCV_SUBTYPE_MASK;
switch (reg_subtype) {
case KVM_REG_RISCV_CSR_GENERAL:
rc = kvm_riscv_vcpu_general_get_csr(vcpu, reg_num, &reg_val);
break;
case KVM_REG_RISCV_CSR_AIA:
rc = kvm_riscv_vcpu_aia_get_csr(vcpu, reg_num, &reg_val);
break;
default:
rc = -EINVAL;
break;
}
if (rc)
return rc;
if (copy_to_user(uaddr, &reg_val, KVM_REG_SIZE(reg->id)))
return -EFAULT;
return 0;
}
static int kvm_riscv_vcpu_set_reg_csr(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg)
{
int rc;
unsigned long __user *uaddr =
(unsigned long __user *)(unsigned long)reg->addr;
unsigned long reg_num = reg->id & ~(KVM_REG_ARCH_MASK |
KVM_REG_SIZE_MASK |
KVM_REG_RISCV_CSR);
unsigned long reg_val, reg_subtype;
if (KVM_REG_SIZE(reg->id) != sizeof(unsigned long))
return -EINVAL;
if (copy_from_user(&reg_val, uaddr, KVM_REG_SIZE(reg->id)))
return -EFAULT;
reg_subtype = reg_num & KVM_REG_RISCV_SUBTYPE_MASK;
reg_num &= ~KVM_REG_RISCV_SUBTYPE_MASK;
switch (reg_subtype) {
case KVM_REG_RISCV_CSR_GENERAL:
rc = kvm_riscv_vcpu_general_set_csr(vcpu, reg_num, reg_val);
break;
case KVM_REG_RISCV_CSR_AIA:
rc = kvm_riscv_vcpu_aia_set_csr(vcpu, reg_num, reg_val);
break;
default:
rc = -EINVAL;
break;
}
if (rc)
return rc;
return 0;
}
static int kvm_riscv_vcpu_get_reg_isa_ext(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg)
{
unsigned long __user *uaddr =
(unsigned long __user *)(unsigned long)reg->addr;
unsigned long reg_num = reg->id & ~(KVM_REG_ARCH_MASK |
KVM_REG_SIZE_MASK |
KVM_REG_RISCV_ISA_EXT);
unsigned long reg_val = 0;
unsigned long host_isa_ext;
if (KVM_REG_SIZE(reg->id) != sizeof(unsigned long))
return -EINVAL;
if (reg_num >= KVM_RISCV_ISA_EXT_MAX ||
reg_num >= ARRAY_SIZE(kvm_isa_ext_arr))
return -EINVAL;
host_isa_ext = kvm_isa_ext_arr[reg_num];
if (__riscv_isa_extension_available(vcpu->arch.isa, host_isa_ext))
reg_val = 1; /* Mark the given extension as available */
if (copy_to_user(uaddr, &reg_val, KVM_REG_SIZE(reg->id)))
return -EFAULT;
return 0;
}
static int kvm_riscv_vcpu_set_reg_isa_ext(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg)
{
unsigned long __user *uaddr =
(unsigned long __user *)(unsigned long)reg->addr;
unsigned long reg_num = reg->id & ~(KVM_REG_ARCH_MASK |
KVM_REG_SIZE_MASK |
KVM_REG_RISCV_ISA_EXT);
unsigned long reg_val;
unsigned long host_isa_ext;
if (KVM_REG_SIZE(reg->id) != sizeof(unsigned long))
return -EINVAL;
if (reg_num >= KVM_RISCV_ISA_EXT_MAX ||
reg_num >= ARRAY_SIZE(kvm_isa_ext_arr))
return -EINVAL;
if (copy_from_user(&reg_val, uaddr, KVM_REG_SIZE(reg->id)))
return -EFAULT;
host_isa_ext = kvm_isa_ext_arr[reg_num];
if (!__riscv_isa_extension_available(NULL, host_isa_ext))
return -EOPNOTSUPP;
if (!vcpu->arch.ran_atleast_once) {
/*
* All multi-letter extension and a few single letter
* extension can be disabled
*/
if (reg_val == 1 &&
kvm_riscv_vcpu_isa_enable_allowed(reg_num))
set_bit(host_isa_ext, vcpu->arch.isa);
else if (!reg_val &&
kvm_riscv_vcpu_isa_disable_allowed(reg_num))
clear_bit(host_isa_ext, vcpu->arch.isa);
else
return -EINVAL;
kvm_riscv_vcpu_fp_reset(vcpu);
} else {
return -EOPNOTSUPP;
}
return 0;
}
static int kvm_riscv_vcpu_set_reg(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg)
{
switch (reg->id & KVM_REG_RISCV_TYPE_MASK) {
case KVM_REG_RISCV_CONFIG:
return kvm_riscv_vcpu_set_reg_config(vcpu, reg);
case KVM_REG_RISCV_CORE:
return kvm_riscv_vcpu_set_reg_core(vcpu, reg);
case KVM_REG_RISCV_CSR:
return kvm_riscv_vcpu_set_reg_csr(vcpu, reg);
case KVM_REG_RISCV_TIMER:
return kvm_riscv_vcpu_set_reg_timer(vcpu, reg);
case KVM_REG_RISCV_FP_F:
return kvm_riscv_vcpu_set_reg_fp(vcpu, reg,
KVM_REG_RISCV_FP_F);
case KVM_REG_RISCV_FP_D:
return kvm_riscv_vcpu_set_reg_fp(vcpu, reg,
KVM_REG_RISCV_FP_D);
case KVM_REG_RISCV_ISA_EXT:
return kvm_riscv_vcpu_set_reg_isa_ext(vcpu, reg);
case KVM_REG_RISCV_SBI_EXT:
return kvm_riscv_vcpu_set_reg_sbi_ext(vcpu, reg);
case KVM_REG_RISCV_VECTOR:
return kvm_riscv_vcpu_set_reg_vector(vcpu, reg,
KVM_REG_RISCV_VECTOR);
default:
break;
}
return -EINVAL;
}
static int kvm_riscv_vcpu_get_reg(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg)
{
switch (reg->id & KVM_REG_RISCV_TYPE_MASK) {
case KVM_REG_RISCV_CONFIG:
return kvm_riscv_vcpu_get_reg_config(vcpu, reg);
case KVM_REG_RISCV_CORE:
return kvm_riscv_vcpu_get_reg_core(vcpu, reg);
case KVM_REG_RISCV_CSR:
return kvm_riscv_vcpu_get_reg_csr(vcpu, reg);
case KVM_REG_RISCV_TIMER:
return kvm_riscv_vcpu_get_reg_timer(vcpu, reg);
case KVM_REG_RISCV_FP_F:
return kvm_riscv_vcpu_get_reg_fp(vcpu, reg,
KVM_REG_RISCV_FP_F);
case KVM_REG_RISCV_FP_D:
return kvm_riscv_vcpu_get_reg_fp(vcpu, reg,
KVM_REG_RISCV_FP_D);
case KVM_REG_RISCV_ISA_EXT:
return kvm_riscv_vcpu_get_reg_isa_ext(vcpu, reg);
case KVM_REG_RISCV_SBI_EXT:
return kvm_riscv_vcpu_get_reg_sbi_ext(vcpu, reg);
case KVM_REG_RISCV_VECTOR:
return kvm_riscv_vcpu_get_reg_vector(vcpu, reg,
KVM_REG_RISCV_VECTOR);
default:
break;
}
return -EINVAL;
}
long kvm_arch_vcpu_async_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
@ -781,6 +254,24 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
r = kvm_riscv_vcpu_get_reg(vcpu, &reg);
break;
}
case KVM_GET_REG_LIST: {
struct kvm_reg_list __user *user_list = argp;
struct kvm_reg_list reg_list;
unsigned int n;
r = -EFAULT;
if (copy_from_user(&reg_list, user_list, sizeof(reg_list)))
break;
n = reg_list.n;
reg_list.n = kvm_riscv_vcpu_num_regs(vcpu);
if (copy_to_user(user_list, &reg_list, sizeof(reg_list)))
break;
r = -E2BIG;
if (n < reg_list.n)
break;
r = kvm_riscv_vcpu_copy_reg_indices(vcpu, user_list->reg);
break;
}
default:
break;
}

12
arch/riscv/kvm/vcpu_fp.c
View File

@ -96,7 +96,7 @@ int kvm_riscv_vcpu_get_reg_fp(struct kvm_vcpu *vcpu,
reg_num <= KVM_REG_RISCV_FP_F_REG(f[31]))
reg_val = &cntx->fp.f.f[reg_num];
else
return -EINVAL;
return -ENOENT;
} else if ((rtype == KVM_REG_RISCV_FP_D) &&
riscv_isa_extension_available(vcpu->arch.isa, d)) {
if (reg_num == KVM_REG_RISCV_FP_D_REG(fcsr)) {
@ -109,9 +109,9 @@ int kvm_riscv_vcpu_get_reg_fp(struct kvm_vcpu *vcpu,
return -EINVAL;
reg_val = &cntx->fp.d.f[reg_num];
} else
return -EINVAL;
return -ENOENT;
} else
return -EINVAL;
return -ENOENT;
if (copy_to_user(uaddr, reg_val, KVM_REG_SIZE(reg->id)))
return -EFAULT;
@ -141,7 +141,7 @@ int kvm_riscv_vcpu_set_reg_fp(struct kvm_vcpu *vcpu,
reg_num <= KVM_REG_RISCV_FP_F_REG(f[31]))
reg_val = &cntx->fp.f.f[reg_num];
else
return -EINVAL;
return -ENOENT;
} else if ((rtype == KVM_REG_RISCV_FP_D) &&
riscv_isa_extension_available(vcpu->arch.isa, d)) {
if (reg_num == KVM_REG_RISCV_FP_D_REG(fcsr)) {
@ -154,9 +154,9 @@ int kvm_riscv_vcpu_set_reg_fp(struct kvm_vcpu *vcpu,
return -EINVAL;
reg_val = &cntx->fp.d.f[reg_num];
} else
return -EINVAL;
return -ENOENT;
} else
return -EINVAL;
return -ENOENT;
if (copy_from_user(reg_val, uaddr, KVM_REG_SIZE(reg->id)))
return -EFAULT;

1051
arch/riscv/kvm/vcpu_onereg.c Normal file
View File

File diff suppressed because it is too large Load Diff

16
arch/riscv/kvm/vcpu_sbi.c
View File

@ -140,8 +140,10 @@ static int riscv_vcpu_set_sbi_ext_single(struct kvm_vcpu *vcpu,
const struct kvm_riscv_sbi_extension_entry *sext = NULL;
struct kvm_vcpu_sbi_context *scontext = &vcpu->arch.sbi_context;
if (reg_num >= KVM_RISCV_SBI_EXT_MAX ||
(reg_val != 1 && reg_val != 0))
if (reg_num >= KVM_RISCV_SBI_EXT_MAX)
return -ENOENT;
if (reg_val != 1 && reg_val != 0)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(sbi_ext); i++) {
@ -175,7 +177,7 @@ static int riscv_vcpu_get_sbi_ext_single(struct kvm_vcpu *vcpu,
struct kvm_vcpu_sbi_context *scontext = &vcpu->arch.sbi_context;
if (reg_num >= KVM_RISCV_SBI_EXT_MAX)
return -EINVAL;
return -ENOENT;
for (i = 0; i < ARRAY_SIZE(sbi_ext); i++) {
if (sbi_ext[i].ext_idx == reg_num) {
@ -206,7 +208,7 @@ static int riscv_vcpu_set_sbi_ext_multi(struct kvm_vcpu *vcpu,
unsigned long i, ext_id;
if (reg_num > KVM_REG_RISCV_SBI_MULTI_REG_LAST)
return -EINVAL;
return -ENOENT;
for_each_set_bit(i, &reg_val, BITS_PER_LONG) {
ext_id = i + reg_num * BITS_PER_LONG;
@ -226,7 +228,7 @@ static int riscv_vcpu_get_sbi_ext_multi(struct kvm_vcpu *vcpu,
unsigned long i, ext_id, ext_val;
if (reg_num > KVM_REG_RISCV_SBI_MULTI_REG_LAST)
return -EINVAL;
return -ENOENT;
for (i = 0; i < BITS_PER_LONG; i++) {
ext_id = i + reg_num * BITS_PER_LONG;
@ -272,7 +274,7 @@ int kvm_riscv_vcpu_set_reg_sbi_ext(struct kvm_vcpu *vcpu,
case KVM_REG_RISCV_SBI_MULTI_DIS:
return riscv_vcpu_set_sbi_ext_multi(vcpu, reg_num, reg_val, false);
default:
return -EINVAL;
return -ENOENT;
}
return 0;
@ -307,7 +309,7 @@ int kvm_riscv_vcpu_get_reg_sbi_ext(struct kvm_vcpu *vcpu,
reg_val = ~reg_val;
break;
default:
rc = -EINVAL;
rc = -ENOENT;
}
if (rc)
return rc;

11
arch/riscv/kvm/vcpu_timer.c
View File

@ -170,7 +170,7 @@ int kvm_riscv_vcpu_get_reg_timer(struct kvm_vcpu *vcpu,
if (KVM_REG_SIZE(reg->id) != sizeof(u64))
return -EINVAL;
if (reg_num >= sizeof(struct kvm_riscv_timer) / sizeof(u64))
return -EINVAL;
return -ENOENT;
switch (reg_num) {
case KVM_REG_RISCV_TIMER_REG(frequency):
@ -187,7 +187,7 @@ int kvm_riscv_vcpu_get_reg_timer(struct kvm_vcpu *vcpu,
KVM_RISCV_TIMER_STATE_OFF;
break;
default:
return -EINVAL;
return -ENOENT;
}
if (copy_to_user(uaddr, &reg_val, KVM_REG_SIZE(reg->id)))
@ -211,14 +211,15 @@ int kvm_riscv_vcpu_set_reg_timer(struct kvm_vcpu *vcpu,
if (KVM_REG_SIZE(reg->id) != sizeof(u64))
return -EINVAL;
if (reg_num >= sizeof(struct kvm_riscv_timer) / sizeof(u64))
return -EINVAL;
return -ENOENT;
if (copy_from_user(&reg_val, uaddr, KVM_REG_SIZE(reg->id)))
return -EFAULT;
switch (reg_num) {
case KVM_REG_RISCV_TIMER_REG(frequency):
ret = -EOPNOTSUPP;
if (reg_val != riscv_timebase)
return -EINVAL;
break;
case KVM_REG_RISCV_TIMER_REG(time):
gt->time_delta = reg_val - get_cycles64();
@ -233,7 +234,7 @@ int kvm_riscv_vcpu_set_reg_timer(struct kvm_vcpu *vcpu,
ret = kvm_riscv_vcpu_timer_cancel(t);
break;
default:
ret = -EINVAL;
ret = -ENOENT;
break;
}

72
arch/riscv/kvm/vcpu_vector.c
View File

@ -91,95 +91,93 @@ void kvm_riscv_vcpu_free_vector_context(struct kvm_vcpu *vcpu)
}
#endif
static void *kvm_riscv_vcpu_vreg_addr(struct kvm_vcpu *vcpu,
unsigned long reg_num,
size_t reg_size)
static int kvm_riscv_vcpu_vreg_addr(struct kvm_vcpu *vcpu,
unsigned long reg_num,
size_t reg_size,
void **reg_addr)
{
struct kvm_cpu_context *cntx = &vcpu->arch.guest_context;
void *reg_val;
size_t vlenb = riscv_v_vsize / 32;
if (reg_num < KVM_REG_RISCV_VECTOR_REG(0)) {
if (reg_size != sizeof(unsigned long))
return NULL;
return -EINVAL;
switch (reg_num) {
case KVM_REG_RISCV_VECTOR_CSR_REG(vstart):
reg_val = &cntx->vector.vstart;
*reg_addr = &cntx->vector.vstart;
break;
case KVM_REG_RISCV_VECTOR_CSR_REG(vl):
reg_val = &cntx->vector.vl;
*reg_addr = &cntx->vector.vl;
break;
case KVM_REG_RISCV_VECTOR_CSR_REG(vtype):
reg_val = &cntx->vector.vtype;
*reg_addr = &cntx->vector.vtype;
break;
case KVM_REG_RISCV_VECTOR_CSR_REG(vcsr):
reg_val = &cntx->vector.vcsr;
*reg_addr = &cntx->vector.vcsr;
break;
case KVM_REG_RISCV_VECTOR_CSR_REG(datap):
default:
return NULL;
return -ENOENT;
}
} else if (reg_num <= KVM_REG_RISCV_VECTOR_REG(31)) {
if (reg_size != vlenb)
return NULL;
reg_val = cntx->vector.datap
+ (reg_num - KVM_REG_RISCV_VECTOR_REG(0)) * vlenb;
return -EINVAL;
*reg_addr = cntx->vector.datap +
(reg_num - KVM_REG_RISCV_VECTOR_REG(0)) * vlenb;
} else {
return NULL;
return -ENOENT;
}
return reg_val;
return 0;
}
int kvm_riscv_vcpu_get_reg_vector(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg,
unsigned long rtype)
const struct kvm_one_reg *reg)
{
unsigned long *isa = vcpu->arch.isa;
unsigned long __user *uaddr =
(unsigned long __user *)(unsigned long)reg->addr;
unsigned long reg_num = reg->id & ~(KVM_REG_ARCH_MASK |
KVM_REG_SIZE_MASK |
rtype);
void *reg_val = NULL;
KVM_REG_RISCV_VECTOR);
size_t reg_size = KVM_REG_SIZE(reg->id);
void *reg_addr;
int rc;
if (rtype == KVM_REG_RISCV_VECTOR &&
riscv_isa_extension_available(isa, v)) {
reg_val = kvm_riscv_vcpu_vreg_addr(vcpu, reg_num, reg_size);
}
if (!riscv_isa_extension_available(isa, v))
return -ENOENT;
if (!reg_val)
return -EINVAL;
rc = kvm_riscv_vcpu_vreg_addr(vcpu, reg_num, reg_size, &reg_addr);
if (rc)
return rc;
if (copy_to_user(uaddr, reg_val, reg_size))
if (copy_to_user(uaddr, reg_addr, reg_size))
return -EFAULT;
return 0;
}
int kvm_riscv_vcpu_set_reg_vector(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg,
unsigned long rtype)
const struct kvm_one_reg *reg)
{
unsigned long *isa = vcpu->arch.isa;
unsigned long __user *uaddr =
(unsigned long __user *)(unsigned long)reg->addr;
unsigned long reg_num = reg->id & ~(KVM_REG_ARCH_MASK |
KVM_REG_SIZE_MASK |
rtype);
void *reg_val = NULL;
KVM_REG_RISCV_VECTOR);
size_t reg_size = KVM_REG_SIZE(reg->id);
void *reg_addr;
int rc;
if (rtype == KVM_REG_RISCV_VECTOR &&
riscv_isa_extension_available(isa, v)) {
reg_val = kvm_riscv_vcpu_vreg_addr(vcpu, reg_num, reg_size);
}
if (!riscv_isa_extension_available(isa, v))
return -ENOENT;
if (!reg_val)
return -EINVAL;
rc = kvm_riscv_vcpu_vreg_addr(vcpu, reg_num, reg_size, &reg_addr);
if (rc)
return rc;
if (copy_from_user(reg_val, uaddr, reg_size))
if (copy_from_user(reg_addr, uaddr, reg_size))
return -EFAULT;
return 0;

2
arch/s390/include/asm/kvm_host.h
View File

@ -817,6 +817,8 @@ struct kvm_s390_cpu_model {
__u64 *fac_list;
u64 cpuid;
unsigned short ibc;
/* subset of available UV-features for pv-guests enabled by user space */
struct kvm_s390_vm_cpu_uv_feat uv_feat_guest;
};
typedef int (*crypto_hook)(struct kvm_vcpu *vcpu);

19
arch/s390/include/asm/uv.h
View File

@ -99,6 +99,8 @@ enum uv_cmds_inst {
enum uv_feat_ind {
BIT_UV_FEAT_MISC = 0,
BIT_UV_FEAT_AIV = 1,
BIT_UV_FEAT_AP = 4,
BIT_UV_FEAT_AP_INTR = 5,
};
struct uv_cb_header {
@ -159,7 +161,15 @@ struct uv_cb_cgc {
u64 guest_handle;
u64 conf_base_stor_origin;
u64 conf_virt_stor_origin;
u64 reserved30;
u8 reserved30[6];
union {
struct {
u16 : 14;
u16 ap_instr_intr : 1;
u16 ap_allow_instr : 1;
};
u16 raw;
} flags;
u64 guest_stor_origin;
u64 guest_stor_len;
u64 guest_sca;
@ -397,6 +407,13 @@ struct uv_info {
extern struct uv_info uv_info;
static inline bool uv_has_feature(u8 feature_bit)
{
if (feature_bit >= sizeof(uv_info.uv_feature_indications) * 8)
return false;
return test_bit_inv(feature_bit, &uv_info.uv_feature_indications);
}
#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
extern int prot_virt_guest;

16
arch/s390/include/uapi/asm/kvm.h
View File

@ -159,6 +159,22 @@ struct kvm_s390_vm_cpu_subfunc {
__u8 reserved[1728];
};
#define KVM_S390_VM_CPU_PROCESSOR_UV_FEAT_GUEST 6
#define KVM_S390_VM_CPU_MACHINE_UV_FEAT_GUEST 7
#define KVM_S390_VM_CPU_UV_FEAT_NR_BITS 64
struct kvm_s390_vm_cpu_uv_feat {
union {
struct {
__u64 : 4;
__u64 ap : 1; /* bit 4 */
__u64 ap_intr : 1; /* bit 5 */
__u64 : 58;
};
__u64 feat;
};
};
/* kvm attributes for crypto */
#define KVM_S390_VM_CRYPTO_ENABLE_AES_KW 0
#define KVM_S390_VM_CRYPTO_ENABLE_DEA_KW 1

2
arch/s390/kernel/uv.c
View File

@ -258,7 +258,7 @@ static bool should_export_before_import(struct uv_cb_header *uvcb, struct mm_str
* shared page from a different protected VM will automatically also
* transfer its ownership.
*/
if (test_bit_inv(BIT_UV_FEAT_MISC, &uv_info.uv_feature_indications))
if (uv_has_feature(BIT_UV_FEAT_MISC))
return false;
if (uvcb->cmd == UVC_CMD_UNPIN_PAGE_SHARED)
return false;

38
arch/s390/kvm/intercept.c
View File

@ -228,6 +228,21 @@ static int handle_itdb(struct kvm_vcpu *vcpu)
#define per_event(vcpu) (vcpu->arch.sie_block->iprcc & PGM_PER)
static bool should_handle_per_event(const struct kvm_vcpu *vcpu)
{
if (!guestdbg_enabled(vcpu) || !per_event(vcpu))
return false;
if (guestdbg_sstep_enabled(vcpu) &&
vcpu->arch.sie_block->iprcc != PGM_PER) {
/*
* __vcpu_run() will exit after delivering the concurrently
* indicated condition.
*/
return false;
}
return true;
}
static int handle_prog(struct kvm_vcpu *vcpu)
{
psw_t psw;
@ -242,7 +257,7 @@ static int handle_prog(struct kvm_vcpu *vcpu)
if (kvm_s390_pv_cpu_is_protected(vcpu))
return -EOPNOTSUPP;
if (guestdbg_enabled(vcpu) && per_event(vcpu)) {
if (should_handle_per_event(vcpu)) {
rc = kvm_s390_handle_per_event(vcpu);
if (rc)
return rc;
@ -571,6 +586,19 @@ static int handle_pv_notification(struct kvm_vcpu *vcpu)
return handle_instruction(vcpu);
}
static bool should_handle_per_ifetch(const struct kvm_vcpu *vcpu, int rc)
{
/* Process PER, also if the instruction is processed in user space. */
if (!(vcpu->arch.sie_block->icptstatus & 0x02))
return false;
if (rc != 0 && rc != -EOPNOTSUPP)
return false;
if (guestdbg_sstep_enabled(vcpu) && vcpu->arch.local_int.pending_irqs)
/* __vcpu_run() will exit after delivering the interrupt. */
return false;
return true;
}
int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
{
int rc, per_rc = 0;
@ -605,8 +633,8 @@ int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
rc = handle_partial_execution(vcpu);
break;
case ICPT_KSS:
rc = kvm_s390_skey_check_enable(vcpu);
break;
/* Instruction will be redriven, skip the PER check. */
return kvm_s390_skey_check_enable(vcpu);
case ICPT_MCHKREQ:
case ICPT_INT_ENABLE:
/*
@ -633,9 +661,7 @@ int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
return -EOPNOTSUPP;
}
/* process PER, also if the instruction is processed in user space */
if (vcpu->arch.sie_block->icptstatus & 0x02 &&
(!rc || rc == -EOPNOTSUPP))
if (should_handle_per_ifetch(vcpu, rc))
per_rc = kvm_s390_handle_per_ifetch_icpt(vcpu);
return per_rc ? per_rc : rc;
}

14
arch/s390/kvm/interrupt.c
View File

@ -1392,6 +1392,7 @@ int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
{
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
int rc = 0;
bool delivered = false;
unsigned long irq_type;
unsigned long irqs;
@ -1465,6 +1466,19 @@ int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
WARN_ONCE(1, "Unknown pending irq type %ld", irq_type);
clear_bit(irq_type, &li->pending_irqs);
}
delivered |= !rc;
}
/*
* We delivered at least one interrupt and modified the PC. Force a
* singlestep event now.
*/
if (delivered && guestdbg_sstep_enabled(vcpu)) {
struct kvm_debug_exit_arch *debug_exit = &vcpu->run->debug.arch;
debug_exit->addr = vcpu->arch.sie_block->gpsw.addr;
debug_exit->type = KVM_SINGLESTEP;
vcpu->guest_debug |= KVM_GUESTDBG_EXIT_PENDING;
}
set_intercept_indicators(vcpu);

102
arch/s390/kvm/kvm-s390.c
View File

@ -1531,6 +1531,39 @@ static int kvm_s390_set_processor_subfunc(struct kvm *kvm,
return 0;
}
#define KVM_S390_VM_CPU_UV_FEAT_GUEST_MASK \
( \
((struct kvm_s390_vm_cpu_uv_feat){ \
.ap = 1, \
.ap_intr = 1, \
}) \
.feat \
)
static int kvm_s390_set_uv_feat(struct kvm *kvm, struct kvm_device_attr *attr)
{
struct kvm_s390_vm_cpu_uv_feat __user *ptr = (void __user *)attr->addr;
unsigned long data, filter;
filter = uv_info.uv_feature_indications & KVM_S390_VM_CPU_UV_FEAT_GUEST_MASK;
if (get_user(data, &ptr->feat))
return -EFAULT;
if (!bitmap_subset(&data, &filter, KVM_S390_VM_CPU_UV_FEAT_NR_BITS))
return -EINVAL;
mutex_lock(&kvm->lock);
if (kvm->created_vcpus) {
mutex_unlock(&kvm->lock);
return -EBUSY;
}
kvm->arch.model.uv_feat_guest.feat = data;
mutex_unlock(&kvm->lock);
VM_EVENT(kvm, 3, "SET: guest UV-feat: 0x%16.16lx", data);
return 0;
}
static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
{
int ret = -ENXIO;
@ -1545,6 +1578,9 @@ static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
ret = kvm_s390_set_processor_subfunc(kvm, attr);
break;
case KVM_S390_VM_CPU_PROCESSOR_UV_FEAT_GUEST:
ret = kvm_s390_set_uv_feat(kvm, attr);
break;
}
return ret;
}
@ -1777,6 +1813,33 @@ static int kvm_s390_get_machine_subfunc(struct kvm *kvm,
return 0;
}
static int kvm_s390_get_processor_uv_feat(struct kvm *kvm, struct kvm_device_attr *attr)
{
struct kvm_s390_vm_cpu_uv_feat __user *dst = (void __user *)attr->addr;
unsigned long feat = kvm->arch.model.uv_feat_guest.feat;
if (put_user(feat, &dst->feat))
return -EFAULT;
VM_EVENT(kvm, 3, "GET: guest UV-feat: 0x%16.16lx", feat);
return 0;
}
static int kvm_s390_get_machine_uv_feat(struct kvm *kvm, struct kvm_device_attr *attr)
{
struct kvm_s390_vm_cpu_uv_feat __user *dst = (void __user *)attr->addr;
unsigned long feat;
BUILD_BUG_ON(sizeof(*dst) != sizeof(uv_info.uv_feature_indications));
feat = uv_info.uv_feature_indications & KVM_S390_VM_CPU_UV_FEAT_GUEST_MASK;
if (put_user(feat, &dst->feat))
return -EFAULT;
VM_EVENT(kvm, 3, "GET: guest UV-feat: 0x%16.16lx", feat);
return 0;
}
static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
{
int ret = -ENXIO;
@ -1800,6 +1863,12 @@ static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
ret = kvm_s390_get_machine_subfunc(kvm, attr);
break;
case KVM_S390_VM_CPU_PROCESSOR_UV_FEAT_GUEST:
ret = kvm_s390_get_processor_uv_feat(kvm, attr);
break;
case KVM_S390_VM_CPU_MACHINE_UV_FEAT_GUEST:
ret = kvm_s390_get_machine_uv_feat(kvm, attr);
break;
}
return ret;
}
@ -1952,6 +2021,8 @@ static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr)
case KVM_S390_VM_CPU_MACHINE_FEAT:
case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
case KVM_S390_VM_CPU_MACHINE_UV_FEAT_GUEST:
case KVM_S390_VM_CPU_PROCESSOR_UV_FEAT_GUEST:
ret = 0;
break;
default:
@ -2406,7 +2477,7 @@ static int kvm_s390_cpus_to_pv(struct kvm *kvm, u16 *rc, u16 *rrc)
struct kvm_vcpu *vcpu;
/* Disable the GISA if the ultravisor does not support AIV. */
if (!test_bit_inv(BIT_UV_FEAT_AIV, &uv_info.uv_feature_indications))
if (!uv_has_feature(BIT_UV_FEAT_AIV))
kvm_s390_gisa_disable(kvm);
kvm_for_each_vcpu(i, vcpu, kvm) {
@ -3296,6 +3367,8 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid();
kvm->arch.model.ibc = sclp.ibc & 0x0fff;
kvm->arch.model.uv_feat_guest.feat = 0;
kvm_s390_crypto_init(kvm);
if (IS_ENABLED(CONFIG_VFIO_PCI_ZDEV_KVM)) {
@ -4611,7 +4684,7 @@ static int vcpu_pre_run(struct kvm_vcpu *vcpu)
if (!kvm_is_ucontrol(vcpu->kvm)) {
rc = kvm_s390_deliver_pending_interrupts(vcpu);
if (rc)
if (rc || guestdbg_exit_pending(vcpu))
return rc;
}
@ -4738,7 +4811,7 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
do {
rc = vcpu_pre_run(vcpu);
if (rc)
if (rc || guestdbg_exit_pending(vcpu))
break;
kvm_vcpu_srcu_read_unlock(vcpu);
@ -5383,6 +5456,7 @@ long kvm_arch_vcpu_async_ioctl(struct file *filp,
{
struct kvm_vcpu *vcpu = filp->private_data;
void __user *argp = (void __user *)arg;
int rc;
switch (ioctl) {
case KVM_S390_IRQ: {
@ -5390,7 +5464,8 @@ long kvm_arch_vcpu_async_ioctl(struct file *filp,
if (copy_from_user(&s390irq, argp, sizeof(s390irq)))
return -EFAULT;
return kvm_s390_inject_vcpu(vcpu, &s390irq);
rc = kvm_s390_inject_vcpu(vcpu, &s390irq);
break;
}
case KVM_S390_INTERRUPT: {
struct kvm_s390_interrupt s390int;
@ -5400,10 +5475,25 @@ long kvm_arch_vcpu_async_ioctl(struct file *filp,
return -EFAULT;
if (s390int_to_s390irq(&s390int, &s390irq))
return -EINVAL;
return kvm_s390_inject_vcpu(vcpu, &s390irq);
rc = kvm_s390_inject_vcpu(vcpu, &s390irq);
break;
}
default:
rc = -ENOIOCTLCMD;
break;
}
return -ENOIOCTLCMD;
/*
* To simplify single stepping of userspace-emulated instructions,
* KVM_EXIT_S390_SIEIC exit sets KVM_GUESTDBG_EXIT_PENDING (see
* should_handle_per_ifetch()). However, if userspace emulation injects
* an interrupt, it needs to be cleared, so that KVM_EXIT_DEBUG happens
* after (and not before) the interrupt delivery.
*/
if (!rc)
vcpu->guest_debug &= ~KVM_GUESTDBG_EXIT_PENDING;
return rc;
}
static int kvm_s390_handle_pv_vcpu_dump(struct kvm_vcpu *vcpu,

9
arch/s390/kvm/pv.c
View File

@ -285,7 +285,8 @@ static int kvm_s390_pv_deinit_vm_fast(struct kvm *kvm, u16 *rc, u16 *rrc)
WRITE_ONCE(kvm->arch.gmap->guest_handle, 0);
KVM_UV_EVENT(kvm, 3, "PROTVIRT DESTROY VM FAST: rc %x rrc %x",
uvcb.header.rc, uvcb.header.rrc);
WARN_ONCE(cc, "protvirt destroy vm fast failed handle %llx rc %x rrc %x",
WARN_ONCE(cc && uvcb.header.rc != 0x104,
"protvirt destroy vm fast failed handle %llx rc %x rrc %x",
kvm_s390_pv_get_handle(kvm), uvcb.header.rc, uvcb.header.rrc);
/* Intended memory leak on "impossible" error */
if (!cc)
@ -575,12 +576,14 @@ int kvm_s390_pv_init_vm(struct kvm *kvm, u16 *rc, u16 *rrc)
uvcb.conf_base_stor_origin =
virt_to_phys((void *)kvm->arch.pv.stor_base);
uvcb.conf_virt_stor_origin = (u64)kvm->arch.pv.stor_var;
uvcb.flags.ap_allow_instr = kvm->arch.model.uv_feat_guest.ap;
uvcb.flags.ap_instr_intr = kvm->arch.model.uv_feat_guest.ap_intr;
cc = uv_call_sched(0, (u64)&uvcb);
*rc = uvcb.header.rc;
*rrc = uvcb.header.rrc;
KVM_UV_EVENT(kvm, 3, "PROTVIRT CREATE VM: handle %llx len %llx rc %x rrc %x",
uvcb.guest_handle, uvcb.guest_stor_len, *rc, *rrc);
KVM_UV_EVENT(kvm, 3, "PROTVIRT CREATE VM: handle %llx len %llx rc %x rrc %x flags %04x",
uvcb.guest_handle, uvcb.guest_stor_len, *rc, *rrc, uvcb.flags.raw);
/* Outputs */
kvm->arch.pv.handle = uvcb.guest_handle;

2
arch/s390/mm/fault.c
View File

@ -598,7 +598,7 @@ void do_secure_storage_access(struct pt_regs *regs)
* reliable without the misc UV feature so we need to check
* for that as well.
*/
if (test_bit_inv(BIT_UV_FEAT_MISC, &uv_info.uv_feature_indications) &&
if (uv_has_feature(BIT_UV_FEAT_MISC) &&
!test_bit_inv(61, &regs->int_parm_long)) {
/*
* When this happens, userspace did something that it

1
arch/x86/include/asm/cpufeatures.h
View File

@ -439,6 +439,7 @@
#define X86_FEATURE_SEV_ES (19*32+ 3) /* AMD Secure Encrypted Virtualization - Encrypted State */
#define X86_FEATURE_V_TSC_AUX (19*32+ 9) /* "" Virtual TSC_AUX */
#define X86_FEATURE_SME_COHERENT (19*32+10) /* "" AMD hardware-enforced cache coherency */
#define X86_FEATURE_DEBUG_SWAP (19*32+14) /* AMD SEV-ES full debug state swap support */
/* AMD-defined Extended Feature 2 EAX, CPUID level 0x80000021 (EAX), word 20 */
#define X86_FEATURE_NO_NESTED_DATA_BP (20*32+ 0) /* "" No Nested Data Breakpoints */

2
arch/x86/include/asm/kexec.h
View File

@ -205,8 +205,6 @@ int arch_kimage_file_post_load_cleanup(struct kimage *image);
#endif
#endif
typedef void crash_vmclear_fn(void);
extern crash_vmclear_fn __rcu *crash_vmclear_loaded_vmcss;
extern void kdump_nmi_shootdown_cpus(void);
#ifdef CONFIG_CRASH_HOTPLUG

46
arch/x86/include/asm/kvm_host.h
View File

@ -288,13 +288,13 @@ struct kvm_kernel_irq_routing_entry;
* kvm_mmu_page_role tracks the properties of a shadow page (where shadow page
* also includes TDP pages) to determine whether or not a page can be used in
* the given MMU context. This is a subset of the overall kvm_cpu_role to
* minimize the size of kvm_memory_slot.arch.gfn_track, i.e. allows allocating
* 2 bytes per gfn instead of 4 bytes per gfn.
* minimize the size of kvm_memory_slot.arch.gfn_write_track, i.e. allows
* allocating 2 bytes per gfn instead of 4 bytes per gfn.
*
* Upper-level shadow pages having gptes are tracked for write-protection via
* gfn_track. As above, gfn_track is a 16 bit counter, so KVM must not create
* more than 2^16-1 upper-level shadow pages at a single gfn, otherwise
* gfn_track will overflow and explosions will ensure.
* gfn_write_track. As above, gfn_write_track is a 16 bit counter, so KVM must
* not create more than 2^16-1 upper-level shadow pages at a single gfn,
* otherwise gfn_write_track will overflow and explosions will ensue.
*
* A unique shadow page (SP) for a gfn is created if and only if an existing SP
* cannot be reused. The ability to reuse a SP is tracked by its role, which
@ -746,7 +746,6 @@ struct kvm_vcpu_arch {
u64 smi_count;
bool at_instruction_boundary;
bool tpr_access_reporting;
bool xsaves_enabled;
bool xfd_no_write_intercept;
u64 ia32_xss;
u64 microcode_version;
@ -831,6 +830,25 @@ struct kvm_vcpu_arch {
struct kvm_cpuid_entry2 *cpuid_entries;
struct kvm_hypervisor_cpuid kvm_cpuid;
/*
* FIXME: Drop this macro and use KVM_NR_GOVERNED_FEATURES directly
* when "struct kvm_vcpu_arch" is no longer defined in an
* arch/x86/include/asm header. The max is mostly arbitrary, i.e.
* can be increased as necessary.
*/
#define KVM_MAX_NR_GOVERNED_FEATURES BITS_PER_LONG
/*
* Track whether or not the guest is allowed to use features that are
* governed by KVM, where "governed" means KVM needs to manage state
* and/or explicitly enable the feature in hardware. Typically, but
* not always, governed features can be used by the guest if and only
* if both KVM and userspace want to expose the feature to the guest.
*/
struct {
DECLARE_BITMAP(enabled, KVM_MAX_NR_GOVERNED_FEATURES);
} governed_features;
u64 reserved_gpa_bits;
int maxphyaddr;
@ -1005,7 +1023,7 @@ struct kvm_lpage_info {
struct kvm_arch_memory_slot {
struct kvm_rmap_head *rmap[KVM_NR_PAGE_SIZES];
struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
unsigned short *gfn_track[KVM_PAGE_TRACK_MAX];
unsigned short *gfn_write_track;
};
/*
@ -1247,8 +1265,9 @@ struct kvm_arch {
* create an NX huge page (without hanging the guest).
*/
struct list_head possible_nx_huge_pages;
struct kvm_page_track_notifier_node mmu_sp_tracker;
#ifdef CONFIG_KVM_EXTERNAL_WRITE_TRACKING
struct kvm_page_track_notifier_head track_notifier_head;
#endif
/*
* Protects marking pages unsync during page faults, as TDP MMU page
* faults only take mmu_lock for read. For simplicity, the unsync
@ -1655,8 +1674,8 @@ struct kvm_x86_ops {
u64 (*get_l2_tsc_offset)(struct kvm_vcpu *vcpu);
u64 (*get_l2_tsc_multiplier)(struct kvm_vcpu *vcpu);
void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset);
void (*write_tsc_multiplier)(struct kvm_vcpu *vcpu, u64 multiplier);
void (*write_tsc_offset)(struct kvm_vcpu *vcpu);
void (*write_tsc_multiplier)(struct kvm_vcpu *vcpu);
/*
* Retrieve somewhat arbitrary exit information. Intended to
@ -1795,8 +1814,8 @@ static inline struct kvm *kvm_arch_alloc_vm(void)
#define __KVM_HAVE_ARCH_VM_FREE
void kvm_arch_free_vm(struct kvm *kvm);
#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB
static inline int kvm_arch_flush_remote_tlb(struct kvm *kvm)
#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS
static inline int kvm_arch_flush_remote_tlbs(struct kvm *kvm)
{
if (kvm_x86_ops.flush_remote_tlbs &&
!static_call(kvm_x86_flush_remote_tlbs)(kvm))
@ -1805,6 +1824,8 @@ static inline int kvm_arch_flush_remote_tlb(struct kvm *kvm)
return -ENOTSUPP;
}
#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS_RANGE
#define kvm_arch_pmi_in_guest(vcpu) \
((vcpu) && (vcpu)->arch.handling_intr_from_guest)
@ -1833,7 +1854,6 @@ void kvm_mmu_zap_collapsible_sptes(struct kvm *kvm,
const struct kvm_memory_slot *memslot);
void kvm_mmu_slot_leaf_clear_dirty(struct kvm *kvm,
const struct kvm_memory_slot *memslot);
void kvm_mmu_zap_all(struct kvm *kvm);
void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm, u64 gen);
void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned long kvm_nr_mmu_pages);

71
arch/x86/include/asm/kvm_page_track.h
View File

@ -2,11 +2,9 @@
#ifndef _ASM_X86_KVM_PAGE_TRACK_H
#define _ASM_X86_KVM_PAGE_TRACK_H
enum kvm_page_track_mode {
KVM_PAGE_TRACK_WRITE,
KVM_PAGE_TRACK_MAX,
};
#include <linux/kvm_types.h>
#ifdef CONFIG_KVM_EXTERNAL_WRITE_TRACKING
/*
* The notifier represented by @kvm_page_track_notifier_node is linked into
* the head which will be notified when guest is triggering the track event.
@ -26,54 +24,39 @@ struct kvm_page_track_notifier_node {
* It is called when guest is writing the write-tracked page
* and write emulation is finished at that time.
*
* @vcpu: the vcpu where the write access happened.
* @gpa: the physical address written by guest.
* @new: the data was written to the address.
* @bytes: the written length.
* @node: this node
*/
void (*track_write)(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new,
int bytes, struct kvm_page_track_notifier_node *node);
/*
* It is called when memory slot is being moved or removed
* users can drop write-protection for the pages in that memory slot
*
* @kvm: the kvm where memory slot being moved or removed
* @slot: the memory slot being moved or removed
* @node: this node
*/
void (*track_flush_slot)(struct kvm *kvm, struct kvm_memory_slot *slot,
void (*track_write)(gpa_t gpa, const u8 *new, int bytes,
struct kvm_page_track_notifier_node *node);
/*
* Invoked when a memory region is removed from the guest. Or in KVM
* terms, when a memslot is deleted.
*
* @gfn: base gfn of the region being removed
* @nr_pages: number of pages in the to-be-removed region
* @node: this node
*/
void (*track_remove_region)(gfn_t gfn, unsigned long nr_pages,
struct kvm_page_track_notifier_node *node);
};
int kvm_page_track_init(struct kvm *kvm);
void kvm_page_track_cleanup(struct kvm *kvm);
int kvm_page_track_register_notifier(struct kvm *kvm,
struct kvm_page_track_notifier_node *n);
void kvm_page_track_unregister_notifier(struct kvm *kvm,
struct kvm_page_track_notifier_node *n);
bool kvm_page_track_write_tracking_enabled(struct kvm *kvm);
int kvm_page_track_write_tracking_alloc(struct kvm_memory_slot *slot);
int kvm_write_track_add_gfn(struct kvm *kvm, gfn_t gfn);
int kvm_write_track_remove_gfn(struct kvm *kvm, gfn_t gfn);
#else
/*
* Allow defining a node in a structure even if page tracking is disabled, e.g.
* to play nice with testing headers via direct inclusion from the command line.
*/
struct kvm_page_track_notifier_node {};
#endif /* CONFIG_KVM_EXTERNAL_WRITE_TRACKING */
void kvm_page_track_free_memslot(struct kvm_memory_slot *slot);
int kvm_page_track_create_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot,
unsigned long npages);
void kvm_slot_page_track_add_page(struct kvm *kvm,
struct kvm_memory_slot *slot, gfn_t gfn,
enum kvm_page_track_mode mode);
void kvm_slot_page_track_remove_page(struct kvm *kvm,
struct kvm_memory_slot *slot, gfn_t gfn,
enum kvm_page_track_mode mode);
bool kvm_slot_page_track_is_active(struct kvm *kvm,
const struct kvm_memory_slot *slot,
gfn_t gfn, enum kvm_page_track_mode mode);
void
kvm_page_track_register_notifier(struct kvm *kvm,
struct kvm_page_track_notifier_node *n);
void
kvm_page_track_unregister_notifier(struct kvm *kvm,
struct kvm_page_track_notifier_node *n);
void kvm_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new,
int bytes);
void kvm_page_track_flush_slot(struct kvm *kvm, struct kvm_memory_slot *slot);
#endif

7
arch/x86/include/asm/reboot.h
View File

@ -25,7 +25,14 @@ void __noreturn machine_real_restart(unsigned int type);
#define MRR_BIOS 0
#define MRR_APM 1
#if IS_ENABLED(CONFIG_KVM_INTEL) || IS_ENABLED(CONFIG_KVM_AMD)
typedef void (cpu_emergency_virt_cb)(void);
void cpu_emergency_register_virt_callback(cpu_emergency_virt_cb *callback);
void cpu_emergency_unregister_virt_callback(cpu_emergency_virt_cb *callback);
void cpu_emergency_disable_virtualization(void);
#else
static inline void cpu_emergency_disable_virtualization(void) {}
#endif /* CONFIG_KVM_INTEL || CONFIG_KVM_AMD */
typedef void (*nmi_shootdown_cb)(int, struct pt_regs*);
void nmi_shootdown_cpus(nmi_shootdown_cb callback);

5
arch/x86/include/asm/svm.h
View File

@ -288,6 +288,7 @@ static_assert((X2AVIC_MAX_PHYSICAL_ID & AVIC_PHYSICAL_MAX_INDEX_MASK) == X2AVIC_
#define AVIC_HPA_MASK ~((0xFFFULL << 52) | 0xFFF)
#define SVM_SEV_FEAT_DEBUG_SWAP BIT(5)
struct vmcb_seg {
u16 selector;
@ -345,7 +346,7 @@ struct vmcb_save_area {
u64 last_excp_from;
u64 last_excp_to;
u8 reserved_0x298[72];
u32 spec_ctrl; /* Guest version of SPEC_CTRL at 0x2E0 */
u64 spec_ctrl; /* Guest version of SPEC_CTRL at 0x2E0 */
} __packed;
/* Save area definition for SEV-ES and SEV-SNP guests */
@ -512,7 +513,7 @@ struct ghcb {
} __packed;
#define EXPECTED_VMCB_SAVE_AREA_SIZE 740
#define EXPECTED_VMCB_SAVE_AREA_SIZE 744
#define EXPECTED_GHCB_SAVE_AREA_SIZE 1032
#define EXPECTED_SEV_ES_SAVE_AREA_SIZE 1648
#define EXPECTED_VMCB_CONTROL_AREA_SIZE 1024

154
arch/x86/include/asm/virtext.h
View File

@ -1,154 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/* CPU virtualization extensions handling
*
* This should carry the code for handling CPU virtualization extensions
* that needs to live in the kernel core.
*
* Author: Eduardo Habkost <ehabkost@redhat.com>
*
* Copyright (C) 2008, Red Hat Inc.
*
* Contains code from KVM, Copyright (C) 2006 Qumranet, Inc.
*/
#ifndef _ASM_X86_VIRTEX_H
#define _ASM_X86_VIRTEX_H
#include <asm/processor.h>
#include <asm/vmx.h>
#include <asm/svm.h>
#include <asm/tlbflush.h>
/*
* VMX functions:
*/
static inline int cpu_has_vmx(void)
{
unsigned long ecx = cpuid_ecx(1);
return test_bit(5, &ecx); /* CPUID.1:ECX.VMX[bit 5] -> VT */
}
/**
* cpu_vmxoff() - Disable VMX on the current CPU
*
* Disable VMX and clear CR4.VMXE (even if VMXOFF faults)
*
* Note, VMXOFF causes a #UD if the CPU is !post-VMXON, but it's impossible to
* atomically track post-VMXON state, e.g. this may be called in NMI context.
* Eat all faults as all other faults on VMXOFF faults are mode related, i.e.
* faults are guaranteed to be due to the !post-VMXON check unless the CPU is
* magically in RM, VM86, compat mode, or at CPL>0.
*/
static inline int cpu_vmxoff(void)
{
asm_volatile_goto("1: vmxoff\n\t"
_ASM_EXTABLE(1b, %l[fault])
::: "cc", "memory" : fault);
cr4_clear_bits(X86_CR4_VMXE);
return 0;
fault:
cr4_clear_bits(X86_CR4_VMXE);
return -EIO;
}
static inline int cpu_vmx_enabled(void)
{
return __read_cr4() & X86_CR4_VMXE;
}
/** Disable VMX if it is enabled on the current CPU
*
* You shouldn't call this if cpu_has_vmx() returns 0.
*/
static inline void __cpu_emergency_vmxoff(void)
{
if (cpu_vmx_enabled())
cpu_vmxoff();
}
/** Disable VMX if it is supported and enabled on the current CPU
*/
static inline void cpu_emergency_vmxoff(void)
{
if (cpu_has_vmx())
__cpu_emergency_vmxoff();
}
/*
* SVM functions:
*/
/** Check if the CPU has SVM support
*
* You can use the 'msg' arg to get a message describing the problem,
* if the function returns zero. Simply pass NULL if you are not interested
* on the messages; gcc should take care of not generating code for
* the messages on this case.
*/
static inline int cpu_has_svm(const char **msg)
{
if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD &&
boot_cpu_data.x86_vendor != X86_VENDOR_HYGON) {
if (msg)
*msg = "not amd or hygon";
return 0;
}
if (boot_cpu_data.extended_cpuid_level < SVM_CPUID_FUNC) {
if (msg)
*msg = "can't execute cpuid_8000000a";
return 0;
}
if (!boot_cpu_has(X86_FEATURE_SVM)) {
if (msg)
*msg = "svm not available";
return 0;
}
return 1;
}
/** Disable SVM on the current CPU
*
* You should call this only if cpu_has_svm() returned true.
*/
static inline void cpu_svm_disable(void)
{
uint64_t efer;
wrmsrl(MSR_VM_HSAVE_PA, 0);
rdmsrl(MSR_EFER, efer);
if (efer & EFER_SVME) {
/*
* Force GIF=1 prior to disabling SVM to ensure INIT and NMI
* aren't blocked, e.g. if a fatal error occurred between CLGI
* and STGI. Note, STGI may #UD if SVM is disabled from NMI
* context between reading EFER and executing STGI. In that
* case, GIF must already be set, otherwise the NMI would have
* been blocked, so just eat the fault.
*/
asm_volatile_goto("1: stgi\n\t"
_ASM_EXTABLE(1b, %l[fault])
::: "memory" : fault);
fault:
wrmsrl(MSR_EFER, efer & ~EFER_SVME);
}
}
/** Makes sure SVM is disabled, if it is supported on the CPU
*/
static inline void cpu_emergency_svm_disable(void)
{
if (cpu_has_svm(NULL))
cpu_svm_disable();
}
#endif /* _ASM_X86_VIRTEX_H */

2
arch/x86/include/asm/vmx.h
View File

@ -71,7 +71,7 @@
#define SECONDARY_EXEC_RDSEED_EXITING VMCS_CONTROL_BIT(RDSEED_EXITING)
#define SECONDARY_EXEC_ENABLE_PML VMCS_CONTROL_BIT(PAGE_MOD_LOGGING)
#define SECONDARY_EXEC_PT_CONCEAL_VMX VMCS_CONTROL_BIT(PT_CONCEAL_VMX)
#define SECONDARY_EXEC_XSAVES VMCS_CONTROL_BIT(XSAVES)
#define SECONDARY_EXEC_ENABLE_XSAVES VMCS_CONTROL_BIT(XSAVES)
#define SECONDARY_EXEC_MODE_BASED_EPT_EXEC VMCS_CONTROL_BIT(MODE_BASED_EPT_EXEC)
#define SECONDARY_EXEC_PT_USE_GPA VMCS_CONTROL_BIT(PT_USE_GPA)
#define SECONDARY_EXEC_TSC_SCALING VMCS_CONTROL_BIT(TSC_SCALING)

31
arch/x86/kernel/crash.c
View File

@ -48,38 +48,12 @@ struct crash_memmap_data {
unsigned int type;
};
/*
* This is used to VMCLEAR all VMCSs loaded on the
* processor. And when loading kvm_intel module, the
* callback function pointer will be assigned.
*
* protected by rcu.
*/
crash_vmclear_fn __rcu *crash_vmclear_loaded_vmcss = NULL;
EXPORT_SYMBOL_GPL(crash_vmclear_loaded_vmcss);
static inline void cpu_crash_vmclear_loaded_vmcss(void)
{
crash_vmclear_fn *do_vmclear_operation = NULL;
rcu_read_lock();
do_vmclear_operation = rcu_dereference(crash_vmclear_loaded_vmcss);
if (do_vmclear_operation)
do_vmclear_operation();
rcu_read_unlock();
}
#if defined(CONFIG_SMP) && defined(CONFIG_X86_LOCAL_APIC)
static void kdump_nmi_callback(int cpu, struct pt_regs *regs)
{
crash_save_cpu(regs, cpu);
/*
* VMCLEAR VMCSs loaded on all cpus if needed.
*/
cpu_crash_vmclear_loaded_vmcss();
/*
* Disable Intel PT to stop its logging
*/
@ -133,11 +107,6 @@ void native_machine_crash_shutdown(struct pt_regs *regs)
crash_smp_send_stop();
/*
* VMCLEAR VMCSs loaded on this cpu if needed.
*/
cpu_crash_vmclear_loaded_vmcss();
cpu_emergency_disable_virtualization();
/*

66
arch/x86/kernel/reboot.c
View File

@ -22,7 +22,6 @@
#include <asm/reboot_fixups.h>
#include <asm/reboot.h>
#include <asm/pci_x86.h>
#include <asm/virtext.h>
#include <asm/cpu.h>
#include <asm/nmi.h>
#include <asm/smp.h>
@ -530,9 +529,54 @@ static inline void kb_wait(void)
static inline void nmi_shootdown_cpus_on_restart(void);
#if IS_ENABLED(CONFIG_KVM_INTEL) || IS_ENABLED(CONFIG_KVM_AMD)
/* RCU-protected callback to disable virtualization prior to reboot. */
static cpu_emergency_virt_cb __rcu *cpu_emergency_virt_callback;
void cpu_emergency_register_virt_callback(cpu_emergency_virt_cb *callback)
{
if (WARN_ON_ONCE(rcu_access_pointer(cpu_emergency_virt_callback)))
return;
rcu_assign_pointer(cpu_emergency_virt_callback, callback);
}
EXPORT_SYMBOL_GPL(cpu_emergency_register_virt_callback);
void cpu_emergency_unregister_virt_callback(cpu_emergency_virt_cb *callback)
{
if (WARN_ON_ONCE(rcu_access_pointer(cpu_emergency_virt_callback) != callback))
return;
rcu_assign_pointer(cpu_emergency_virt_callback, NULL);
synchronize_rcu();
}
EXPORT_SYMBOL_GPL(cpu_emergency_unregister_virt_callback);
/*
* Disable virtualization, i.e. VMX or SVM, to ensure INIT is recognized during
* reboot. VMX blocks INIT if the CPU is post-VMXON, and SVM blocks INIT if
* GIF=0, i.e. if the crash occurred between CLGI and STGI.
*/
void cpu_emergency_disable_virtualization(void)
{
cpu_emergency_virt_cb *callback;
/*
* IRQs must be disabled as KVM enables virtualization in hardware via
* function call IPIs, i.e. IRQs need to be disabled to guarantee
* virtualization stays disabled.
*/
lockdep_assert_irqs_disabled();
rcu_read_lock();
callback = rcu_dereference(cpu_emergency_virt_callback);
if (callback)
callback();
rcu_read_unlock();
}
static void emergency_reboot_disable_virtualization(void)
{
/* Just make sure we won't change CPUs while doing this */
local_irq_disable();
/*
@ -545,7 +589,7 @@ static void emergency_reboot_disable_virtualization(void)
* Do the NMI shootdown even if virtualization is off on _this_ CPU, as
* other CPUs may have virtualization enabled.
*/
if (cpu_has_vmx() || cpu_has_svm(NULL)) {
if (rcu_access_pointer(cpu_emergency_virt_callback)) {
/* Safely force _this_ CPU out of VMX/SVM operation. */
cpu_emergency_disable_virtualization();
@ -553,7 +597,9 @@ static void emergency_reboot_disable_virtualization(void)
nmi_shootdown_cpus_on_restart();
}
}
#else
static void emergency_reboot_disable_virtualization(void) { }
#endif /* CONFIG_KVM_INTEL || CONFIG_KVM_AMD */
void __attribute__((weak)) mach_reboot_fixups(void)
{
@ -787,21 +833,9 @@ void machine_crash_shutdown(struct pt_regs *regs)
}
#endif
/* This is the CPU performing the emergency shutdown work. */
int crashing_cpu = -1;
/*
* Disable virtualization, i.e. VMX or SVM, to ensure INIT is recognized during
* reboot. VMX blocks INIT if the CPU is post-VMXON, and SVM blocks INIT if
* GIF=0, i.e. if the crash occurred between CLGI and STGI.
*/
void cpu_emergency_disable_virtualization(void)
{
cpu_emergency_vmxoff();
cpu_emergency_svm_disable();
}
#if defined(CONFIG_SMP)
static nmi_shootdown_cb shootdown_callback;

15
arch/x86/kvm/Kconfig
View File

@ -101,7 +101,7 @@ config X86_SGX_KVM
config KVM_AMD
tristate "KVM for AMD processors support"
depends on KVM
depends on KVM && (CPU_SUP_AMD || CPU_SUP_HYGON)
help
Provides support for KVM on AMD processors equipped with the AMD-V
(SVM) extensions.
@ -138,6 +138,19 @@ config KVM_XEN
If in doubt, say "N".
config KVM_PROVE_MMU
bool "Prove KVM MMU correctness"
depends on DEBUG_KERNEL
depends on KVM
depends on EXPERT
help
Enables runtime assertions in KVM's MMU that are too costly to enable
in anything remotely resembling a production environment, e.g. this
gates code that verifies a to-be-freed page table doesn't have any
present SPTEs.
If in doubt, say "N".
config KVM_EXTERNAL_WRITE_TRACKING
bool

40
arch/x86/kvm/cpuid.c
View File

@ -11,6 +11,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kvm_host.h>
#include "linux/lockdep.h"
#include <linux/export.h>
#include <linux/vmalloc.h>
#include <linux/uaccess.h>
@ -84,6 +85,18 @@ static inline struct kvm_cpuid_entry2 *cpuid_entry2_find(
struct kvm_cpuid_entry2 *e;
int i;
/*
* KVM has a semi-arbitrary rule that querying the guest's CPUID model
* with IRQs disabled is disallowed. The CPUID model can legitimately
* have over one hundred entries, i.e. the lookup is slow, and IRQs are
* typically disabled in KVM only when KVM is in a performance critical
* path, e.g. the core VM-Enter/VM-Exit run loop. Nothing will break
* if this rule is violated, this assertion is purely to flag potential
* performance issues. If this fires, consider moving the lookup out
* of the hotpath, e.g. by caching information during CPUID updates.
*/
lockdep_assert_irqs_enabled();
for (i = 0; i < nent; i++) {
e = &entries[i];
@ -312,6 +325,27 @@ static void kvm_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu)
{
struct kvm_lapic *apic = vcpu->arch.apic;
struct kvm_cpuid_entry2 *best;
bool allow_gbpages;
BUILD_BUG_ON(KVM_NR_GOVERNED_FEATURES > KVM_MAX_NR_GOVERNED_FEATURES);
bitmap_zero(vcpu->arch.governed_features.enabled,
KVM_MAX_NR_GOVERNED_FEATURES);
/*
* If TDP is enabled, let the guest use GBPAGES if they're supported in
* hardware. The hardware page walker doesn't let KVM disable GBPAGES,
* i.e. won't treat them as reserved, and KVM doesn't redo the GVA->GPA
* walk for performance and complexity reasons. Not to mention KVM
* _can't_ solve the problem because GVA->GPA walks aren't visible to
* KVM once a TDP translation is installed. Mimic hardware behavior so
* that KVM's is at least consistent, i.e. doesn't randomly inject #PF.
* If TDP is disabled, honor *only* guest CPUID as KVM has full control
* and can install smaller shadow pages if the host lacks 1GiB support.
*/
allow_gbpages = tdp_enabled ? boot_cpu_has(X86_FEATURE_GBPAGES) :
guest_cpuid_has(vcpu, X86_FEATURE_GBPAGES);
if (allow_gbpages)
kvm_governed_feature_set(vcpu, X86_FEATURE_GBPAGES);
best = kvm_find_cpuid_entry(vcpu, 1);
if (best && apic) {
@ -647,7 +681,8 @@ void kvm_set_cpu_caps(void)
);
kvm_cpu_cap_init_kvm_defined(CPUID_7_1_EDX,
F(AVX_VNNI_INT8) | F(AVX_NE_CONVERT) | F(PREFETCHITI)
F(AVX_VNNI_INT8) | F(AVX_NE_CONVERT) | F(PREFETCHITI) |
F(AMX_COMPLEX)
);
kvm_cpu_cap_mask(CPUID_D_1_EAX,
@ -1154,6 +1189,9 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function)
cpuid_entry_override(entry, CPUID_8000_0001_EDX);
cpuid_entry_override(entry, CPUID_8000_0001_ECX);
break;
case 0x80000005:
/* Pass host L1 cache and TLB info. */
break;
case 0x80000006:
/* Drop reserved bits, pass host L2 cache and TLB info. */
entry->edx &= ~GENMASK(17, 16);

46
arch/x86/kvm/cpuid.h
View File

@ -232,4 +232,50 @@ static __always_inline bool guest_pv_has(struct kvm_vcpu *vcpu,
return vcpu->arch.pv_cpuid.features & (1u << kvm_feature);
}
enum kvm_governed_features {
#define KVM_GOVERNED_FEATURE(x) KVM_GOVERNED_##x,
#include "governed_features.h"
KVM_NR_GOVERNED_FEATURES
};
static __always_inline int kvm_governed_feature_index(unsigned int x86_feature)
{
switch (x86_feature) {
#define KVM_GOVERNED_FEATURE(x) case x: return KVM_GOVERNED_##x;
#include "governed_features.h"
default:
return -1;
}
}
static __always_inline bool kvm_is_governed_feature(unsigned int x86_feature)
{
return kvm_governed_feature_index(x86_feature) >= 0;
}
static __always_inline void kvm_governed_feature_set(struct kvm_vcpu *vcpu,
unsigned int x86_feature)
{
BUILD_BUG_ON(!kvm_is_governed_feature(x86_feature));
__set_bit(kvm_governed_feature_index(x86_feature),
vcpu->arch.governed_features.enabled);
}
static __always_inline void kvm_governed_feature_check_and_set(struct kvm_vcpu *vcpu,
unsigned int x86_feature)
{
if (kvm_cpu_cap_has(x86_feature) && guest_cpuid_has(vcpu, x86_feature))
kvm_governed_feature_set(vcpu, x86_feature);
}
static __always_inline bool guest_can_use(struct kvm_vcpu *vcpu,
unsigned int x86_feature)
{
BUILD_BUG_ON(!kvm_is_governed_feature(x86_feature));
return test_bit(kvm_governed_feature_index(x86_feature),
vcpu->arch.governed_features.enabled);
}
#endif

2
arch/x86/kvm/emulate.c
View File

@ -1799,13 +1799,11 @@ static int writeback(struct x86_emulate_ctxt *ctxt, struct operand *op)
op->addr.mem,
&op->val,
op->bytes);
break;
case OP_MEM_STR:
return segmented_write(ctxt,
op->addr.mem,
op->data,
op->bytes * op->count);
break;
case OP_XMM:
kvm_write_sse_reg(op->addr.xmm, &op->vec_val);
break;

21
arch/x86/kvm/governed_features.h Normal file
View File

@ -0,0 +1,21 @@
/* SPDX-License-Identifier: GPL-2.0 */
#if !defined(KVM_GOVERNED_FEATURE) || defined(KVM_GOVERNED_X86_FEATURE)
BUILD_BUG()
#endif
#define KVM_GOVERNED_X86_FEATURE(x) KVM_GOVERNED_FEATURE(X86_FEATURE_##x)
KVM_GOVERNED_X86_FEATURE(GBPAGES)
KVM_GOVERNED_X86_FEATURE(XSAVES)
KVM_GOVERNED_X86_FEATURE(VMX)
KVM_GOVERNED_X86_FEATURE(NRIPS)
KVM_GOVERNED_X86_FEATURE(TSCRATEMSR)
KVM_GOVERNED_X86_FEATURE(V_VMSAVE_VMLOAD)
KVM_GOVERNED_X86_FEATURE(LBRV)
KVM_GOVERNED_X86_FEATURE(PAUSEFILTER)
KVM_GOVERNED_X86_FEATURE(PFTHRESHOLD)
KVM_GOVERNED_X86_FEATURE(VGIF)
KVM_GOVERNED_X86_FEATURE(VNMI)
#undef KVM_GOVERNED_X86_FEATURE
#undef KVM_GOVERNED_FEATURE

1
arch/x86/kvm/hyperv.c
View File

@ -1293,7 +1293,6 @@ static bool hv_check_msr_access(struct kvm_vcpu_hv *hv_vcpu, u32 msr)
case HV_X64_MSR_VP_ASSIST_PAGE:
return hv_vcpu->cpuid_cache.features_eax &
HV_MSR_APIC_ACCESS_AVAILABLE;
break;
case HV_X64_MSR_TSC_FREQUENCY:
case HV_X64_MSR_APIC_FREQUENCY:
return hv_vcpu->cpuid_cache.features_eax &

1
arch/x86/kvm/kvm_emulate.h
View File

@ -213,7 +213,6 @@ struct x86_emulate_ops {
bool (*get_cpuid)(struct x86_emulate_ctxt *ctxt, u32 *eax, u32 *ebx,
u32 *ecx, u32 *edx, bool exact_only);
bool (*guest_has_long_mode)(struct x86_emulate_ctxt *ctxt);
bool (*guest_has_movbe)(struct x86_emulate_ctxt *ctxt);
bool (*guest_has_fxsr)(struct x86_emulate_ctxt *ctxt);
bool (*guest_has_rdpid)(struct x86_emulate_ctxt *ctxt);

29
arch/x86/kvm/lapic.c
View File

@ -376,7 +376,8 @@ void kvm_recalculate_apic_map(struct kvm *kvm)
struct kvm_vcpu *vcpu;
unsigned long i;
u32 max_id = 255; /* enough space for any xAPIC ID */
bool xapic_id_mismatch = false;
bool xapic_id_mismatch;
int r;
/* Read kvm->arch.apic_map_dirty before kvm->arch.apic_map. */
if (atomic_read_acquire(&kvm->arch.apic_map_dirty) == CLEAN)
@ -386,9 +387,14 @@ void kvm_recalculate_apic_map(struct kvm *kvm)
"Dirty APIC map without an in-kernel local APIC");
mutex_lock(&kvm->arch.apic_map_lock);
retry:
/*
* Read kvm->arch.apic_map_dirty before kvm->arch.apic_map
* (if clean) or the APIC registers (if dirty).
* Read kvm->arch.apic_map_dirty before kvm->arch.apic_map (if clean)
* or the APIC registers (if dirty). Note, on retry the map may have
* not yet been marked dirty by whatever task changed a vCPU's x2APIC
* ID, i.e. the map may still show up as in-progress. In that case
* this task still needs to retry and complete its calculation.
*/
if (atomic_cmpxchg_acquire(&kvm->arch.apic_map_dirty,
DIRTY, UPDATE_IN_PROGRESS) == CLEAN) {
@ -397,6 +403,15 @@ void kvm_recalculate_apic_map(struct kvm *kvm)
return;
}
/*
* Reset the mismatch flag between attempts so that KVM does the right
* thing if a vCPU changes its xAPIC ID, but do NOT reset max_id, i.e.
* keep max_id strictly increasing. Disallowing max_id from shrinking
* ensures KVM won't get stuck in an infinite loop, e.g. if the vCPU
* with the highest x2APIC ID is toggling its APIC on and off.
*/
xapic_id_mismatch = false;
kvm_for_each_vcpu(i, vcpu, kvm)
if (kvm_apic_present(vcpu))
max_id = max(max_id, kvm_x2apic_id(vcpu->arch.apic));
@ -415,9 +430,15 @@ void kvm_recalculate_apic_map(struct kvm *kvm)
if (!kvm_apic_present(vcpu))
continue;
if (kvm_recalculate_phys_map(new, vcpu, &xapic_id_mismatch)) {
r = kvm_recalculate_phys_map(new, vcpu, &xapic_id_mismatch);
if (r) {
kvfree(new);
new = NULL;
if (r == -E2BIG) {
cond_resched();
goto retry;
}
goto out;
}

2
arch/x86/kvm/mmu.h
View File

@ -121,6 +121,8 @@ void kvm_mmu_unload(struct kvm_vcpu *vcpu);
void kvm_mmu_free_obsolete_roots(struct kvm_vcpu *vcpu);
void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
void kvm_mmu_sync_prev_roots(struct kvm_vcpu *vcpu);
void kvm_mmu_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new,
int bytes);
static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
{

371
arch/x86/kvm/mmu/mmu.c
View File

@ -25,6 +25,7 @@
#include "kvm_cache_regs.h"
#include "smm.h"
#include "kvm_emulate.h"
#include "page_track.h"
#include "cpuid.h"
#include "spte.h"
@ -53,7 +54,7 @@
#include <asm/io.h>
#include <asm/set_memory.h>
#include <asm/vmx.h>
#include <asm/kvm_page_track.h>
#include "trace.h"
extern bool itlb_multihit_kvm_mitigation;
@ -115,11 +116,6 @@ static int max_huge_page_level __read_mostly;
static int tdp_root_level __read_mostly;
static int max_tdp_level __read_mostly;
#ifdef MMU_DEBUG
bool dbg = 0;
module_param(dbg, bool, 0644);
#endif
#define PTE_PREFETCH_NUM 8
#include <trace/events/kvm.h>
@ -278,16 +274,12 @@ static inline bool kvm_available_flush_remote_tlbs_range(void)
return kvm_x86_ops.flush_remote_tlbs_range;
}
void kvm_flush_remote_tlbs_range(struct kvm *kvm, gfn_t start_gfn,
gfn_t nr_pages)
int kvm_arch_flush_remote_tlbs_range(struct kvm *kvm, gfn_t gfn, u64 nr_pages)
{
int ret = -EOPNOTSUPP;
if (!kvm_x86_ops.flush_remote_tlbs_range)
return -EOPNOTSUPP;
if (kvm_x86_ops.flush_remote_tlbs_range)
ret = static_call(kvm_x86_flush_remote_tlbs_range)(kvm, start_gfn,
nr_pages);
if (ret)
kvm_flush_remote_tlbs(kvm);
return static_call(kvm_x86_flush_remote_tlbs_range)(kvm, gfn, nr_pages);
}
static gfn_t kvm_mmu_page_get_gfn(struct kvm_mmu_page *sp, int index);
@ -490,7 +482,7 @@ retry:
*/
static void mmu_spte_set(u64 *sptep, u64 new_spte)
{
WARN_ON(is_shadow_present_pte(*sptep));
WARN_ON_ONCE(is_shadow_present_pte(*sptep));
__set_spte(sptep, new_spte);
}
@ -502,7 +494,7 @@ static u64 mmu_spte_update_no_track(u64 *sptep, u64 new_spte)
{
u64 old_spte = *sptep;
WARN_ON(!is_shadow_present_pte(new_spte));
WARN_ON_ONCE(!is_shadow_present_pte(new_spte));
check_spte_writable_invariants(new_spte);
if (!is_shadow_present_pte(old_spte)) {
@ -515,7 +507,7 @@ static u64 mmu_spte_update_no_track(u64 *sptep, u64 new_spte)
else
old_spte = __update_clear_spte_slow(sptep, new_spte);
WARN_ON(spte_to_pfn(old_spte) != spte_to_pfn(new_spte));
WARN_ON_ONCE(spte_to_pfn(old_spte) != spte_to_pfn(new_spte));
return old_spte;
}
@ -597,7 +589,7 @@ static u64 mmu_spte_clear_track_bits(struct kvm *kvm, u64 *sptep)
* by a refcounted page, the refcount is elevated.
*/
page = kvm_pfn_to_refcounted_page(pfn);
WARN_ON(page && !page_count(page));
WARN_ON_ONCE(page && !page_count(page));
if (is_accessed_spte(old_spte))
kvm_set_pfn_accessed(pfn);
@ -812,7 +804,7 @@ static void update_gfn_disallow_lpage_count(const struct kvm_memory_slot *slot,
for (i = PG_LEVEL_2M; i <= KVM_MAX_HUGEPAGE_LEVEL; ++i) {
linfo = lpage_info_slot(gfn, slot, i);
linfo->disallow_lpage += count;
WARN_ON(linfo->disallow_lpage < 0);
WARN_ON_ONCE(linfo->disallow_lpage < 0);
}
}
@ -839,8 +831,7 @@ static void account_shadowed(struct kvm *kvm, struct kvm_mmu_page *sp)
/* the non-leaf shadow pages are keeping readonly. */
if (sp->role.level > PG_LEVEL_4K)
return kvm_slot_page_track_add_page(kvm, slot, gfn,
KVM_PAGE_TRACK_WRITE);
return __kvm_write_track_add_gfn(kvm, slot, gfn);
kvm_mmu_gfn_disallow_lpage(slot, gfn);
@ -886,8 +877,7 @@ static void unaccount_shadowed(struct kvm *kvm, struct kvm_mmu_page *sp)
slots = kvm_memslots_for_spte_role(kvm, sp->role);
slot = __gfn_to_memslot(slots, gfn);
if (sp->role.level > PG_LEVEL_4K)
return kvm_slot_page_track_remove_page(kvm, slot, gfn,
KVM_PAGE_TRACK_WRITE);
return __kvm_write_track_remove_gfn(kvm, slot, gfn);
kvm_mmu_gfn_allow_lpage(slot, gfn);
}
@ -941,10 +931,8 @@ static int pte_list_add(struct kvm_mmu_memory_cache *cache, u64 *spte,
int count = 0;
if (!rmap_head->val) {
rmap_printk("%p %llx 0->1\n", spte, *spte);
rmap_head->val = (unsigned long)spte;
} else if (!(rmap_head->val & 1)) {
rmap_printk("%p %llx 1->many\n", spte, *spte);
desc = kvm_mmu_memory_cache_alloc(cache);
desc->sptes[0] = (u64 *)rmap_head->val;
desc->sptes[1] = spte;
@ -953,7 +941,6 @@ static int pte_list_add(struct kvm_mmu_memory_cache *cache, u64 *spte,
rmap_head->val = (unsigned long)desc | 1;
++count;
} else {
rmap_printk("%p %llx many->many\n", spte, *spte);
desc = (struct pte_list_desc *)(rmap_head->val & ~1ul);
count = desc->tail_count + desc->spte_count;
@ -973,7 +960,8 @@ static int pte_list_add(struct kvm_mmu_memory_cache *cache, u64 *spte,
return count;
}
static void pte_list_desc_remove_entry(struct kvm_rmap_head *rmap_head,
static void pte_list_desc_remove_entry(struct kvm *kvm,
struct kvm_rmap_head *rmap_head,
struct pte_list_desc *desc, int i)
{
struct pte_list_desc *head_desc = (struct pte_list_desc *)(rmap_head->val & ~1ul);
@ -984,7 +972,7 @@ static void pte_list_desc_remove_entry(struct kvm_rmap_head *rmap_head,
* when adding an entry and the previous head is full, and heads are
* removed (this flow) when they become empty.
*/
BUG_ON(j < 0);
KVM_BUG_ON_DATA_CORRUPTION(j < 0, kvm);
/*
* Replace the to-be-freed SPTE with the last valid entry from the head
@ -1009,35 +997,34 @@ static void pte_list_desc_remove_entry(struct kvm_rmap_head *rmap_head,
mmu_free_pte_list_desc(head_desc);
}
static void pte_list_remove(u64 *spte, struct kvm_rmap_head *rmap_head)
static void pte_list_remove(struct kvm *kvm, u64 *spte,
struct kvm_rmap_head *rmap_head)
{
struct pte_list_desc *desc;
int i;
if (!rmap_head->val) {
pr_err("%s: %p 0->BUG\n", __func__, spte);
BUG();
} else if (!(rmap_head->val & 1)) {
rmap_printk("%p 1->0\n", spte);
if ((u64 *)rmap_head->val != spte) {
pr_err("%s: %p 1->BUG\n", __func__, spte);
BUG();
}
if (KVM_BUG_ON_DATA_CORRUPTION(!rmap_head->val, kvm))
return;
if (!(rmap_head->val & 1)) {
if (KVM_BUG_ON_DATA_CORRUPTION((u64 *)rmap_head->val != spte, kvm))
return;
rmap_head->val = 0;
} else {
rmap_printk("%p many->many\n", spte);
desc = (struct pte_list_desc *)(rmap_head->val & ~1ul);
while (desc) {
for (i = 0; i < desc->spte_count; ++i) {
if (desc->sptes[i] == spte) {
pte_list_desc_remove_entry(rmap_head, desc, i);
pte_list_desc_remove_entry(kvm, rmap_head,
desc, i);
return;
}
}
desc = desc->more;
}
pr_err("%s: %p many->many\n", __func__, spte);
BUG();
KVM_BUG_ON_DATA_CORRUPTION(true, kvm);
}
}
@ -1045,7 +1032,7 @@ static void kvm_zap_one_rmap_spte(struct kvm *kvm,
struct kvm_rmap_head *rmap_head, u64 *sptep)
{
mmu_spte_clear_track_bits(kvm, sptep);
pte_list_remove(sptep, rmap_head);
pte_list_remove(kvm, sptep, rmap_head);
}
/* Return true if at least one SPTE was zapped, false otherwise */
@ -1120,7 +1107,7 @@ static void rmap_remove(struct kvm *kvm, u64 *spte)
slot = __gfn_to_memslot(slots, gfn);
rmap_head = gfn_to_rmap(gfn, sp->role.level, slot);
pte_list_remove(spte, rmap_head);
pte_list_remove(kvm, spte, rmap_head);
}
/*
@ -1212,7 +1199,7 @@ static void drop_large_spte(struct kvm *kvm, u64 *sptep, bool flush)
struct kvm_mmu_page *sp;
sp = sptep_to_sp(sptep);
WARN_ON(sp->role.level == PG_LEVEL_4K);
WARN_ON_ONCE(sp->role.level == PG_LEVEL_4K);
drop_spte(kvm, sptep);
@ -1241,8 +1228,6 @@ static bool spte_write_protect(u64 *sptep, bool pt_protect)
!(pt_protect && is_mmu_writable_spte(spte)))
return false;
rmap_printk("spte %p %llx\n", sptep, *sptep);
if (pt_protect)
spte &= ~shadow_mmu_writable_mask;
spte = spte & ~PT_WRITABLE_MASK;
@ -1267,9 +1252,7 @@ static bool spte_clear_dirty(u64 *sptep)
{
u64 spte = *sptep;
rmap_printk("spte %p %llx\n", sptep, *sptep);
MMU_WARN_ON(!spte_ad_enabled(spte));
KVM_MMU_WARN_ON(!spte_ad_enabled(spte));
spte &= ~shadow_dirty_mask;
return mmu_spte_update(sptep, spte);
}
@ -1475,14 +1458,11 @@ static bool kvm_set_pte_rmap(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
u64 new_spte;
kvm_pfn_t new_pfn;
WARN_ON(pte_huge(pte));
WARN_ON_ONCE(pte_huge(pte));
new_pfn = pte_pfn(pte);
restart:
for_each_rmap_spte(rmap_head, &iter, sptep) {
rmap_printk("spte %p %llx gfn %llx (%d)\n",
sptep, *sptep, gfn, level);
need_flush = true;
if (pte_write(pte)) {
@ -1588,7 +1568,7 @@ static __always_inline bool kvm_handle_gfn_range(struct kvm *kvm,
for_each_slot_rmap_range(range->slot, PG_LEVEL_4K, KVM_MAX_HUGEPAGE_LEVEL,
range->start, range->end - 1, &iterator)
ret |= handler(kvm, iterator.rmap, range->slot, iterator.gfn,
iterator.level, range->pte);
iterator.level, range->arg.pte);
return ret;
}
@ -1710,21 +1690,19 @@ bool kvm_test_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
return young;
}
#ifdef MMU_DEBUG
static int is_empty_shadow_page(u64 *spt)
static void kvm_mmu_check_sptes_at_free(struct kvm_mmu_page *sp)
{
u64 *pos;
u64 *end;
#ifdef CONFIG_KVM_PROVE_MMU
int i;
for (pos = spt, end = pos + SPTE_ENT_PER_PAGE; pos != end; pos++)
if (is_shadow_present_pte(*pos)) {
printk(KERN_ERR "%s: %p %llx\n", __func__,
pos, *pos);
return 0;
}
return 1;
}
for (i = 0; i < SPTE_ENT_PER_PAGE; i++) {
if (KVM_MMU_WARN_ON(is_shadow_present_pte(sp->spt[i])))
pr_err_ratelimited("SPTE %llx (@ %p) for gfn %llx shadow-present at free",
sp->spt[i], &sp->spt[i],
kvm_mmu_page_get_gfn(sp, i));
}
#endif
}
/*
* This value is the sum of all of the kvm instances's
@ -1752,7 +1730,8 @@ static void kvm_unaccount_mmu_page(struct kvm *kvm, struct kvm_mmu_page *sp)
static void kvm_mmu_free_shadow_page(struct kvm_mmu_page *sp)
{
MMU_WARN_ON(!is_empty_shadow_page(sp->spt));
kvm_mmu_check_sptes_at_free(sp);
hlist_del(&sp->hash_link);
list_del(&sp->link);
free_page((unsigned long)sp->spt);
@ -1775,16 +1754,16 @@ static void mmu_page_add_parent_pte(struct kvm_mmu_memory_cache *cache,
pte_list_add(cache, parent_pte, &sp->parent_ptes);
}
static void mmu_page_remove_parent_pte(struct kvm_mmu_page *sp,
static void mmu_page_remove_parent_pte(struct kvm *kvm, struct kvm_mmu_page *sp,
u64 *parent_pte)
{
pte_list_remove(parent_pte, &sp->parent_ptes);
pte_list_remove(kvm, parent_pte, &sp->parent_ptes);
}
static void drop_parent_pte(struct kvm_mmu_page *sp,
static void drop_parent_pte(struct kvm *kvm, struct kvm_mmu_page *sp,
u64 *parent_pte)
{
mmu_page_remove_parent_pte(sp, parent_pte);
mmu_page_remove_parent_pte(kvm, sp, parent_pte);
mmu_spte_clear_no_track(parent_pte);
}
@ -1840,7 +1819,7 @@ static int mmu_pages_add(struct kvm_mmu_pages *pvec, struct kvm_mmu_page *sp,
static inline void clear_unsync_child_bit(struct kvm_mmu_page *sp, int idx)
{
--sp->unsync_children;
WARN_ON((int)sp->unsync_children < 0);
WARN_ON_ONCE((int)sp->unsync_children < 0);
__clear_bit(idx, sp->unsync_child_bitmap);
}
@ -1898,7 +1877,7 @@ static int mmu_unsync_walk(struct kvm_mmu_page *sp,
static void kvm_unlink_unsync_page(struct kvm *kvm, struct kvm_mmu_page *sp)
{
WARN_ON(!sp->unsync);
WARN_ON_ONCE(!sp->unsync);
trace_kvm_mmu_sync_page(sp);
sp->unsync = 0;
--kvm->stat.mmu_unsync;
@ -2073,11 +2052,11 @@ static int mmu_pages_first(struct kvm_mmu_pages *pvec,
if (pvec->nr == 0)
return 0;
WARN_ON(pvec->page[0].idx != INVALID_INDEX);
WARN_ON_ONCE(pvec->page[0].idx != INVALID_INDEX);
sp = pvec->page[0].sp;
level = sp->role.level;
WARN_ON(level == PG_LEVEL_4K);
WARN_ON_ONCE(level == PG_LEVEL_4K);
parents->parent[level-2] = sp;
@ -2099,7 +2078,7 @@ static void mmu_pages_clear_parents(struct mmu_page_path *parents)
if (!sp)
return;
WARN_ON(idx == INVALID_INDEX);
WARN_ON_ONCE(idx == INVALID_INDEX);
clear_unsync_child_bit(sp, idx);
level++;
} while (!sp->unsync_children);
@ -2220,7 +2199,7 @@ static struct kvm_mmu_page *kvm_mmu_find_shadow_page(struct kvm *kvm,
if (ret < 0)
break;
WARN_ON(!list_empty(&invalid_list));
WARN_ON_ONCE(!list_empty(&invalid_list));
if (ret > 0)
kvm_flush_remote_tlbs(kvm);
}
@ -2499,7 +2478,7 @@ static void validate_direct_spte(struct kvm_vcpu *vcpu, u64 *sptep,
if (child->role.access == direct_access)
return;
drop_parent_pte(child, sptep);
drop_parent_pte(vcpu->kvm, child, sptep);
kvm_flush_remote_tlbs_sptep(vcpu->kvm, sptep);
}
}
@ -2517,7 +2496,7 @@ static int mmu_page_zap_pte(struct kvm *kvm, struct kvm_mmu_page *sp,
drop_spte(kvm, spte);
} else {
child = spte_to_child_sp(pte);
drop_parent_pte(child, spte);
drop_parent_pte(kvm, child, spte);
/*
* Recursively zap nested TDP SPs, parentless SPs are
@ -2548,13 +2527,13 @@ static int kvm_mmu_page_unlink_children(struct kvm *kvm,
return zapped;
}
static void kvm_mmu_unlink_parents(struct kvm_mmu_page *sp)
static void kvm_mmu_unlink_parents(struct kvm *kvm, struct kvm_mmu_page *sp)
{
u64 *sptep;
struct rmap_iterator iter;
while ((sptep = rmap_get_first(&sp->parent_ptes, &iter)))
drop_parent_pte(sp, sptep);
drop_parent_pte(kvm, sp, sptep);
}
static int mmu_zap_unsync_children(struct kvm *kvm,
@ -2593,7 +2572,7 @@ static bool __kvm_mmu_prepare_zap_page(struct kvm *kvm,
++kvm->stat.mmu_shadow_zapped;
*nr_zapped = mmu_zap_unsync_children(kvm, sp, invalid_list);
*nr_zapped += kvm_mmu_page_unlink_children(kvm, sp, invalid_list);
kvm_mmu_unlink_parents(sp);
kvm_mmu_unlink_parents(kvm, sp);
/* Zapping children means active_mmu_pages has become unstable. */
list_unstable = *nr_zapped;
@ -2675,7 +2654,7 @@ static void kvm_mmu_commit_zap_page(struct kvm *kvm,
kvm_flush_remote_tlbs(kvm);
list_for_each_entry_safe(sp, nsp, invalid_list, link) {
WARN_ON(!sp->role.invalid || sp->root_count);
WARN_ON_ONCE(!sp->role.invalid || sp->root_count);
kvm_mmu_free_shadow_page(sp);
}
}
@ -2775,12 +2754,9 @@ int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn)
LIST_HEAD(invalid_list);
int r;
pgprintk("%s: looking for gfn %llx\n", __func__, gfn);
r = 0;
write_lock(&kvm->mmu_lock);
for_each_gfn_valid_sp_with_gptes(kvm, sp, gfn) {
pgprintk("%s: gfn %llx role %x\n", __func__, gfn,
sp->role.word);
r = 1;
kvm_mmu_prepare_zap_page(kvm, sp, &invalid_list);
}
@ -2831,7 +2807,7 @@ int mmu_try_to_unsync_pages(struct kvm *kvm, const struct kvm_memory_slot *slot,
* track machinery is used to write-protect upper-level shadow pages,
* i.e. this guards the role.level == 4K assertion below!
*/
if (kvm_slot_page_track_is_active(kvm, slot, gfn, KVM_PAGE_TRACK_WRITE))
if (kvm_gfn_is_write_tracked(kvm, slot, gfn))
return -EPERM;
/*
@ -2873,7 +2849,7 @@ int mmu_try_to_unsync_pages(struct kvm *kvm, const struct kvm_memory_slot *slot,
continue;
}
WARN_ON(sp->role.level != PG_LEVEL_4K);
WARN_ON_ONCE(sp->role.level != PG_LEVEL_4K);
kvm_unsync_page(kvm, sp);
}
if (locked)
@ -2938,9 +2914,6 @@ static int mmu_set_spte(struct kvm_vcpu *vcpu, struct kvm_memory_slot *slot,
bool prefetch = !fault || fault->prefetch;
bool write_fault = fault && fault->write;
pgprintk("%s: spte %llx write_fault %d gfn %llx\n", __func__,
*sptep, write_fault, gfn);
if (unlikely(is_noslot_pfn(pfn))) {
vcpu->stat.pf_mmio_spte_created++;
mark_mmio_spte(vcpu, sptep, gfn, pte_access);
@ -2957,11 +2930,9 @@ static int mmu_set_spte(struct kvm_vcpu *vcpu, struct kvm_memory_slot *slot,
u64 pte = *sptep;
child = spte_to_child_sp(pte);
drop_parent_pte(child, sptep);
drop_parent_pte(vcpu->kvm, child, sptep);
flush = true;
} else if (pfn != spte_to_pfn(*sptep)) {
pgprintk("hfn old %llx new %llx\n",
spte_to_pfn(*sptep), pfn);
drop_spte(vcpu->kvm, sptep);
flush = true;
} else
@ -2986,8 +2957,6 @@ static int mmu_set_spte(struct kvm_vcpu *vcpu, struct kvm_memory_slot *slot,
if (flush)
kvm_flush_remote_tlbs_gfn(vcpu->kvm, gfn, level);
pgprintk("%s: setting spte %llx\n", __func__, *sptep);
if (!was_rmapped) {
WARN_ON_ONCE(ret == RET_PF_SPURIOUS);
rmap_add(vcpu, slot, sptep, gfn, pte_access);
@ -3033,7 +3002,7 @@ static void __direct_pte_prefetch(struct kvm_vcpu *vcpu,
u64 *spte, *start = NULL;
int i;
WARN_ON(!sp->role.direct);
WARN_ON_ONCE(!sp->role.direct);
i = spte_index(sptep) & ~(PTE_PREFETCH_NUM - 1);
spte = sp->spt + i;
@ -3574,12 +3543,8 @@ static void mmu_free_root_page(struct kvm *kvm, hpa_t *root_hpa,
if (!VALID_PAGE(*root_hpa))
return;
/*
* The "root" may be a special root, e.g. a PAE entry, treat it as a
* SPTE to ensure any non-PA bits are dropped.
*/
sp = spte_to_child_sp(*root_hpa);
if (WARN_ON(!sp))
sp = root_to_sp(*root_hpa);
if (WARN_ON_ONCE(!sp))
return;
if (is_tdp_mmu_page(sp))
@ -3624,7 +3589,9 @@ void kvm_mmu_free_roots(struct kvm *kvm, struct kvm_mmu *mmu,
&invalid_list);
if (free_active_root) {
if (to_shadow_page(mmu->root.hpa)) {
if (kvm_mmu_is_dummy_root(mmu->root.hpa)) {
/* Nothing to cleanup for dummy roots. */
} else if (root_to_sp(mmu->root.hpa)) {
mmu_free_root_page(kvm, &mmu->root.hpa, &invalid_list);
} else if (mmu->pae_root) {
for (i = 0; i < 4; ++i) {
@ -3648,6 +3615,7 @@ EXPORT_SYMBOL_GPL(kvm_mmu_free_roots);
void kvm_mmu_free_guest_mode_roots(struct kvm *kvm, struct kvm_mmu *mmu)
{
unsigned long roots_to_free = 0;
struct kvm_mmu_page *sp;
hpa_t root_hpa;
int i;
@ -3662,8 +3630,8 @@ void kvm_mmu_free_guest_mode_roots(struct kvm *kvm, struct kvm_mmu *mmu)
if (!VALID_PAGE(root_hpa))
continue;
if (!to_shadow_page(root_hpa) ||
to_shadow_page(root_hpa)->role.guest_mode)
sp = root_to_sp(root_hpa);
if (!sp || sp->role.guest_mode)
roots_to_free |= KVM_MMU_ROOT_PREVIOUS(i);
}
@ -3671,19 +3639,6 @@ void kvm_mmu_free_guest_mode_roots(struct kvm *kvm, struct kvm_mmu *mmu)
}
EXPORT_SYMBOL_GPL(kvm_mmu_free_guest_mode_roots);
static int mmu_check_root(struct kvm_vcpu *vcpu, gfn_t root_gfn)
{
int ret = 0;
if (!kvm_vcpu_is_visible_gfn(vcpu, root_gfn)) {
kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
ret = 1;
}
return ret;
}
static hpa_t mmu_alloc_root(struct kvm_vcpu *vcpu, gfn_t gfn, int quadrant,
u8 level)
{
@ -3821,8 +3776,10 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu)
root_pgd = kvm_mmu_get_guest_pgd(vcpu, mmu);
root_gfn = root_pgd >> PAGE_SHIFT;
if (mmu_check_root(vcpu, root_gfn))
return 1;
if (!kvm_vcpu_is_visible_gfn(vcpu, root_gfn)) {
mmu->root.hpa = kvm_mmu_get_dummy_root();
return 0;
}
/*
* On SVM, reading PDPTRs might access guest memory, which might fault
@ -3834,8 +3791,8 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu)
if (!(pdptrs[i] & PT_PRESENT_MASK))
continue;
if (mmu_check_root(vcpu, pdptrs[i] >> PAGE_SHIFT))
return 1;
if (!kvm_vcpu_is_visible_gfn(vcpu, pdptrs[i] >> PAGE_SHIFT))
pdptrs[i] = 0;
}
}
@ -4002,7 +3959,7 @@ static bool is_unsync_root(hpa_t root)
{
struct kvm_mmu_page *sp;
if (!VALID_PAGE(root))
if (!VALID_PAGE(root) || kvm_mmu_is_dummy_root(root))
return false;
/*
@ -4018,7 +3975,7 @@ static bool is_unsync_root(hpa_t root)
* requirement isn't satisfied.
*/
smp_rmb();
sp = to_shadow_page(root);
sp = root_to_sp(root);
/*
* PAE roots (somewhat arbitrarily) aren't backed by shadow pages, the
@ -4048,11 +4005,12 @@ void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu)
if (vcpu->arch.mmu->cpu_role.base.level >= PT64_ROOT_4LEVEL) {
hpa_t root = vcpu->arch.mmu->root.hpa;
sp = to_shadow_page(root);
if (!is_unsync_root(root))
return;
sp = root_to_sp(root);
write_lock(&vcpu->kvm->mmu_lock);
mmu_sync_children(vcpu, sp, true);
write_unlock(&vcpu->kvm->mmu_lock);
@ -4194,7 +4152,7 @@ static int handle_mmio_page_fault(struct kvm_vcpu *vcpu, u64 addr, bool direct)
return RET_PF_EMULATE;
reserved = get_mmio_spte(vcpu, addr, &spte);
if (WARN_ON(reserved))
if (WARN_ON_ONCE(reserved))
return -EINVAL;
if (is_mmio_spte(spte)) {
@ -4232,7 +4190,7 @@ static bool page_fault_handle_page_track(struct kvm_vcpu *vcpu,
* guest is writing the page which is write tracked which can
* not be fixed by page fault handler.
*/
if (kvm_slot_page_track_is_active(vcpu->kvm, fault->slot, fault->gfn, KVM_PAGE_TRACK_WRITE))
if (kvm_gfn_is_write_tracked(vcpu->kvm, fault->slot, fault->gfn))
return true;
return false;
@ -4382,7 +4340,7 @@ static int kvm_faultin_pfn(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault,
static bool is_page_fault_stale(struct kvm_vcpu *vcpu,
struct kvm_page_fault *fault)
{
struct kvm_mmu_page *sp = to_shadow_page(vcpu->arch.mmu->root.hpa);
struct kvm_mmu_page *sp = root_to_sp(vcpu->arch.mmu->root.hpa);
/* Special roots, e.g. pae_root, are not backed by shadow pages. */
if (sp && is_obsolete_sp(vcpu->kvm, sp))
@ -4407,6 +4365,10 @@ static int direct_page_fault(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault
{
int r;
/* Dummy roots are used only for shadowing bad guest roots. */
if (WARN_ON_ONCE(kvm_mmu_is_dummy_root(vcpu->arch.mmu->root.hpa)))
return RET_PF_RETRY;
if (page_fault_handle_page_track(vcpu, fault))
return RET_PF_EMULATE;
@ -4443,8 +4405,6 @@ out_unlock:
static int nonpaging_page_fault(struct kvm_vcpu *vcpu,
struct kvm_page_fault *fault)
{
pgprintk("%s: gva %lx error %x\n", __func__, fault->addr, fault->error_code);
/* This path builds a PAE pagetable, we can map 2mb pages at maximum. */
fault->max_level = PG_LEVEL_2M;
return direct_page_fault(vcpu, fault);
@ -4562,9 +4522,19 @@ static void nonpaging_init_context(struct kvm_mmu *context)
static inline bool is_root_usable(struct kvm_mmu_root_info *root, gpa_t pgd,
union kvm_mmu_page_role role)
{
return (role.direct || pgd == root->pgd) &&
VALID_PAGE(root->hpa) &&
role.word == to_shadow_page(root->hpa)->role.word;
struct kvm_mmu_page *sp;
if (!VALID_PAGE(root->hpa))
return false;
if (!role.direct && pgd != root->pgd)
return false;
sp = root_to_sp(root->hpa);
if (WARN_ON_ONCE(!sp))
return false;
return role.word == sp->role.word;
}
/*
@ -4634,11 +4604,10 @@ static bool fast_pgd_switch(struct kvm *kvm, struct kvm_mmu *mmu,
gpa_t new_pgd, union kvm_mmu_page_role new_role)
{
/*
* For now, limit the caching to 64-bit hosts+VMs in order to avoid
* having to deal with PDPTEs. We may add support for 32-bit hosts/VMs
* later if necessary.
* Limit reuse to 64-bit hosts+VMs without "special" roots in order to
* avoid having to deal with PDPTEs and other complexities.
*/
if (VALID_PAGE(mmu->root.hpa) && !to_shadow_page(mmu->root.hpa))
if (VALID_PAGE(mmu->root.hpa) && !root_to_sp(mmu->root.hpa))
kvm_mmu_free_roots(kvm, mmu, KVM_MMU_ROOT_CURRENT);
if (VALID_PAGE(mmu->root.hpa))
@ -4684,9 +4653,12 @@ void kvm_mmu_new_pgd(struct kvm_vcpu *vcpu, gpa_t new_pgd)
* If this is a direct root page, it doesn't have a write flooding
* count. Otherwise, clear the write flooding count.
*/
if (!new_role.direct)
__clear_sp_write_flooding_count(
to_shadow_page(vcpu->arch.mmu->root.hpa));
if (!new_role.direct) {
struct kvm_mmu_page *sp = root_to_sp(vcpu->arch.mmu->root.hpa);
if (!WARN_ON_ONCE(!sp))
__clear_sp_write_flooding_count(sp);
}
}
EXPORT_SYMBOL_GPL(kvm_mmu_new_pgd);
@ -4808,28 +4780,13 @@ static void __reset_rsvds_bits_mask(struct rsvd_bits_validate *rsvd_check,
}
}
static bool guest_can_use_gbpages(struct kvm_vcpu *vcpu)
{
/*
* If TDP is enabled, let the guest use GBPAGES if they're supported in
* hardware. The hardware page walker doesn't let KVM disable GBPAGES,
* i.e. won't treat them as reserved, and KVM doesn't redo the GVA->GPA
* walk for performance and complexity reasons. Not to mention KVM
* _can't_ solve the problem because GVA->GPA walks aren't visible to
* KVM once a TDP translation is installed. Mimic hardware behavior so
* that KVM's is at least consistent, i.e. doesn't randomly inject #PF.
*/
return tdp_enabled ? boot_cpu_has(X86_FEATURE_GBPAGES) :
guest_cpuid_has(vcpu, X86_FEATURE_GBPAGES);
}
static void reset_guest_rsvds_bits_mask(struct kvm_vcpu *vcpu,
struct kvm_mmu *context)
{
__reset_rsvds_bits_mask(&context->guest_rsvd_check,
vcpu->arch.reserved_gpa_bits,
context->cpu_role.base.level, is_efer_nx(context),
guest_can_use_gbpages(vcpu),
guest_can_use(vcpu, X86_FEATURE_GBPAGES),
is_cr4_pse(context),
guest_cpuid_is_amd_or_hygon(vcpu));
}
@ -4906,7 +4863,8 @@ static void reset_shadow_zero_bits_mask(struct kvm_vcpu *vcpu,
__reset_rsvds_bits_mask(shadow_zero_check, reserved_hpa_bits(),
context->root_role.level,
context->root_role.efer_nx,
guest_can_use_gbpages(vcpu), is_pse, is_amd);
guest_can_use(vcpu, X86_FEATURE_GBPAGES),
is_pse, is_amd);
if (!shadow_me_mask)
return;
@ -5467,8 +5425,8 @@ void kvm_mmu_after_set_cpuid(struct kvm_vcpu *vcpu)
* physical address properties) in a single VM would require tracking
* all relevant CPUID information in kvm_mmu_page_role. That is very
* undesirable as it would increase the memory requirements for
* gfn_track (see struct kvm_mmu_page_role comments). For now that
* problem is swept under the rug; KVM's CPUID API is horrific and
* gfn_write_track (see struct kvm_mmu_page_role comments). For now
* that problem is swept under the rug; KVM's CPUID API is horrific and
* it's all but impossible to solve it without introducing a new API.
*/
vcpu->arch.root_mmu.root_role.word = 0;
@ -5531,9 +5489,9 @@ void kvm_mmu_unload(struct kvm_vcpu *vcpu)
struct kvm *kvm = vcpu->kvm;
kvm_mmu_free_roots(kvm, &vcpu->arch.root_mmu, KVM_MMU_ROOTS_ALL);
WARN_ON(VALID_PAGE(vcpu->arch.root_mmu.root.hpa));
WARN_ON_ONCE(VALID_PAGE(vcpu->arch.root_mmu.root.hpa));
kvm_mmu_free_roots(kvm, &vcpu->arch.guest_mmu, KVM_MMU_ROOTS_ALL);
WARN_ON(VALID_PAGE(vcpu->arch.guest_mmu.root.hpa));
WARN_ON_ONCE(VALID_PAGE(vcpu->arch.guest_mmu.root.hpa));
vcpu_clear_mmio_info(vcpu, MMIO_GVA_ANY);
}
@ -5546,16 +5504,21 @@ static bool is_obsolete_root(struct kvm *kvm, hpa_t root_hpa)
/*
* When freeing obsolete roots, treat roots as obsolete if they don't
* have an associated shadow page. This does mean KVM will get false
* have an associated shadow page, as it's impossible to determine if
* such roots are fresh or stale. This does mean KVM will get false
* positives and free roots that don't strictly need to be freed, but
* such false positives are relatively rare:
*
* (a) only PAE paging and nested NPT has roots without shadow pages
* (a) only PAE paging and nested NPT have roots without shadow pages
* (or any shadow paging flavor with a dummy root, see note below)
* (b) remote reloads due to a memslot update obsoletes _all_ roots
* (c) KVM doesn't track previous roots for PAE paging, and the guest
* is unlikely to zap an in-use PGD.
*
* Note! Dummy roots are unique in that they are obsoleted by memslot
* _creation_! See also FNAME(fetch).
*/
sp = to_shadow_page(root_hpa);
sp = root_to_sp(root_hpa);
return !sp || is_obsolete_sp(kvm, sp);
}
@ -5634,9 +5597,6 @@ static bool detect_write_misaligned(struct kvm_mmu_page *sp, gpa_t gpa,
{
unsigned offset, pte_size, misaligned;
pgprintk("misaligned: gpa %llx bytes %d role %x\n",
gpa, bytes, sp->role.word);
offset = offset_in_page(gpa);
pte_size = sp->role.has_4_byte_gpte ? 4 : 8;
@ -5684,9 +5644,8 @@ static u64 *get_written_sptes(struct kvm_mmu_page *sp, gpa_t gpa, int *nspte)
return spte;
}
static void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
const u8 *new, int bytes,
struct kvm_page_track_notifier_node *node)
void kvm_mmu_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new,
int bytes)
{
gfn_t gfn = gpa >> PAGE_SHIFT;
struct kvm_mmu_page *sp;
@ -5702,8 +5661,6 @@ static void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
if (!READ_ONCE(vcpu->kvm->arch.indirect_shadow_pages))
return;
pgprintk("%s: gpa %llx bytes %d\n", __func__, gpa, bytes);
write_lock(&vcpu->kvm->mmu_lock);
gentry = mmu_pte_write_fetch_gpte(vcpu, &gpa, &bytes);
@ -5742,7 +5699,18 @@ int noinline kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 err
int r, emulation_type = EMULTYPE_PF;
bool direct = vcpu->arch.mmu->root_role.direct;
if (WARN_ON(!VALID_PAGE(vcpu->arch.mmu->root.hpa)))
/*
* IMPLICIT_ACCESS is a KVM-defined flag used to correctly perform SMAP
* checks when emulating instructions that triggers implicit access.
* WARN if hardware generates a fault with an error code that collides
* with the KVM-defined value. Clear the flag and continue on, i.e.
* don't terminate the VM, as KVM can't possibly be relying on a flag
* that KVM doesn't know about.
*/
if (WARN_ON_ONCE(error_code & PFERR_IMPLICIT_ACCESS))
error_code &= ~PFERR_IMPLICIT_ACCESS;
if (WARN_ON_ONCE(!VALID_PAGE(vcpu->arch.mmu->root.hpa)))
return RET_PF_RETRY;
r = RET_PF_INVALID;
@ -6099,7 +6067,7 @@ restart:
* pages. Skip the bogus page, otherwise we'll get stuck in an
* infinite loop if the page gets put back on the list (again).
*/
if (WARN_ON(sp->role.invalid))
if (WARN_ON_ONCE(sp->role.invalid))
continue;
/*
@ -6199,16 +6167,8 @@ static bool kvm_has_zapped_obsolete_pages(struct kvm *kvm)
return unlikely(!list_empty_careful(&kvm->arch.zapped_obsolete_pages));
}
static void kvm_mmu_invalidate_zap_pages_in_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot,
struct kvm_page_track_notifier_node *node)
{
kvm_mmu_zap_all_fast(kvm);
}
int kvm_mmu_init_vm(struct kvm *kvm)
{
struct kvm_page_track_notifier_node *node = &kvm->arch.mmu_sp_tracker;
int r;
INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
@ -6222,10 +6182,6 @@ int kvm_mmu_init_vm(struct kvm *kvm)
return r;
}
node->track_write = kvm_mmu_pte_write;
node->track_flush_slot = kvm_mmu_invalidate_zap_pages_in_memslot;
kvm_page_track_register_notifier(kvm, node);
kvm->arch.split_page_header_cache.kmem_cache = mmu_page_header_cache;
kvm->arch.split_page_header_cache.gfp_zero = __GFP_ZERO;
@ -6246,10 +6202,6 @@ static void mmu_free_vm_memory_caches(struct kvm *kvm)
void kvm_mmu_uninit_vm(struct kvm *kvm)
{
struct kvm_page_track_notifier_node *node = &kvm->arch.mmu_sp_tracker;
kvm_page_track_unregister_notifier(kvm, node);
if (tdp_mmu_enabled)
kvm_mmu_uninit_tdp_mmu(kvm);
@ -6670,7 +6622,7 @@ static void kvm_rmap_zap_collapsible_sptes(struct kvm *kvm,
*/
if (walk_slot_rmaps(kvm, slot, kvm_mmu_zap_collapsible_spte,
PG_LEVEL_4K, KVM_MAX_HUGEPAGE_LEVEL - 1, true))
kvm_arch_flush_remote_tlbs_memslot(kvm, slot);
kvm_flush_remote_tlbs_memslot(kvm, slot);
}
void kvm_mmu_zap_collapsible_sptes(struct kvm *kvm,
@ -6689,20 +6641,6 @@ void kvm_mmu_zap_collapsible_sptes(struct kvm *kvm,
}
}
void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm,
const struct kvm_memory_slot *memslot)
{
/*
* All current use cases for flushing the TLBs for a specific memslot
* related to dirty logging, and many do the TLB flush out of mmu_lock.
* The interaction between the various operations on memslot must be
* serialized by slots_locks to ensure the TLB flush from one operation
* is observed by any other operation on the same memslot.
*/
lockdep_assert_held(&kvm->slots_lock);
kvm_flush_remote_tlbs_range(kvm, memslot->base_gfn, memslot->npages);
}
void kvm_mmu_slot_leaf_clear_dirty(struct kvm *kvm,
const struct kvm_memory_slot *memslot)
{
@ -6732,7 +6670,7 @@ void kvm_mmu_slot_leaf_clear_dirty(struct kvm *kvm,
*/
}
void kvm_mmu_zap_all(struct kvm *kvm)
static void kvm_mmu_zap_all(struct kvm *kvm)
{
struct kvm_mmu_page *sp, *node;
LIST_HEAD(invalid_list);
@ -6741,7 +6679,7 @@ void kvm_mmu_zap_all(struct kvm *kvm)
write_lock(&kvm->mmu_lock);
restart:
list_for_each_entry_safe(sp, node, &kvm->arch.active_mmu_pages, link) {
if (WARN_ON(sp->role.invalid))
if (WARN_ON_ONCE(sp->role.invalid))
continue;
if (__kvm_mmu_prepare_zap_page(kvm, sp, &invalid_list, &ign))
goto restart;
@ -6757,9 +6695,20 @@ restart:
write_unlock(&kvm->mmu_lock);
}
void kvm_arch_flush_shadow_all(struct kvm *kvm)
{
kvm_mmu_zap_all(kvm);
}
void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot)
{
kvm_mmu_zap_all_fast(kvm);
}
void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm, u64 gen)
{
WARN_ON(gen & KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS);
WARN_ON_ONCE(gen & KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS);
gen &= MMIO_SPTE_GEN_MASK;
@ -6862,7 +6811,7 @@ static void mmu_destroy_caches(void)
static int get_nx_huge_pages(char *buffer, const struct kernel_param *kp)
{
if (nx_hugepage_mitigation_hard_disabled)
return sprintf(buffer, "never\n");
return sysfs_emit(buffer, "never\n");
return param_get_bool(buffer, kp);
}

27
arch/x86/kvm/mmu/mmu_internal.h
View File

@ -6,18 +6,10 @@
#include <linux/kvm_host.h>
#include <asm/kvm_host.h>
#undef MMU_DEBUG
#ifdef MMU_DEBUG
extern bool dbg;
#define pgprintk(x...) do { if (dbg) printk(x); } while (0)
#define rmap_printk(fmt, args...) do { if (dbg) printk("%s: " fmt, __func__, ## args); } while (0)
#define MMU_WARN_ON(x) WARN_ON(x)
#ifdef CONFIG_KVM_PROVE_MMU
#define KVM_MMU_WARN_ON(x) WARN_ON_ONCE(x)
#else
#define pgprintk(x...) do { } while (0)
#define rmap_printk(x...) do { } while (0)
#define MMU_WARN_ON(x) do { } while (0)
#define KVM_MMU_WARN_ON(x) BUILD_BUG_ON_INVALID(x)
#endif
/* Page table builder macros common to shadow (host) PTEs and guest PTEs. */
@ -44,6 +36,16 @@ extern bool dbg;
#define INVALID_PAE_ROOT 0
#define IS_VALID_PAE_ROOT(x) (!!(x))
static inline hpa_t kvm_mmu_get_dummy_root(void)
{
return my_zero_pfn(0) << PAGE_SHIFT;
}
static inline bool kvm_mmu_is_dummy_root(hpa_t shadow_page)
{
return is_zero_pfn(shadow_page >> PAGE_SHIFT);
}
typedef u64 __rcu *tdp_ptep_t;
struct kvm_mmu_page {
@ -170,9 +172,6 @@ bool kvm_mmu_slot_gfn_write_protect(struct kvm *kvm,
struct kvm_memory_slot *slot, u64 gfn,
int min_level);
void kvm_flush_remote_tlbs_range(struct kvm *kvm, gfn_t start_gfn,
gfn_t nr_pages);
/* Flush the given page (huge or not) of guest memory. */
static inline void kvm_flush_remote_tlbs_gfn(struct kvm *kvm, gfn_t gfn, int level)
{

292
arch/x86/kvm/mmu/page_track.c
View File

@ -12,13 +12,13 @@
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/lockdep.h>
#include <linux/kvm_host.h>
#include <linux/rculist.h>
#include <asm/kvm_page_track.h>
#include "mmu.h"
#include "mmu_internal.h"
#include "page_track.h"
bool kvm_page_track_write_tracking_enabled(struct kvm *kvm)
{
@ -28,103 +28,64 @@ bool kvm_page_track_write_tracking_enabled(struct kvm *kvm)
void kvm_page_track_free_memslot(struct kvm_memory_slot *slot)
{
int i;
kvfree(slot->arch.gfn_write_track);
slot->arch.gfn_write_track = NULL;
}
for (i = 0; i < KVM_PAGE_TRACK_MAX; i++) {
kvfree(slot->arch.gfn_track[i]);
slot->arch.gfn_track[i] = NULL;
}
static int __kvm_page_track_write_tracking_alloc(struct kvm_memory_slot *slot,
unsigned long npages)
{
const size_t size = sizeof(*slot->arch.gfn_write_track);
if (!slot->arch.gfn_write_track)
slot->arch.gfn_write_track = __vcalloc(npages, size,
GFP_KERNEL_ACCOUNT);
return slot->arch.gfn_write_track ? 0 : -ENOMEM;
}
int kvm_page_track_create_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot,
unsigned long npages)
{
int i;
if (!kvm_page_track_write_tracking_enabled(kvm))
return 0;
for (i = 0; i < KVM_PAGE_TRACK_MAX; i++) {
if (i == KVM_PAGE_TRACK_WRITE &&
!kvm_page_track_write_tracking_enabled(kvm))
continue;
slot->arch.gfn_track[i] =
__vcalloc(npages, sizeof(*slot->arch.gfn_track[i]),
GFP_KERNEL_ACCOUNT);
if (!slot->arch.gfn_track[i])
goto track_free;
}
return 0;
track_free:
kvm_page_track_free_memslot(slot);
return -ENOMEM;
}
static inline bool page_track_mode_is_valid(enum kvm_page_track_mode mode)
{
if (mode < 0 || mode >= KVM_PAGE_TRACK_MAX)
return false;
return true;
return __kvm_page_track_write_tracking_alloc(slot, npages);
}
int kvm_page_track_write_tracking_alloc(struct kvm_memory_slot *slot)
{
unsigned short *gfn_track;
if (slot->arch.gfn_track[KVM_PAGE_TRACK_WRITE])
return 0;
gfn_track = __vcalloc(slot->npages, sizeof(*gfn_track),
GFP_KERNEL_ACCOUNT);
if (gfn_track == NULL)
return -ENOMEM;
slot->arch.gfn_track[KVM_PAGE_TRACK_WRITE] = gfn_track;
return 0;
return __kvm_page_track_write_tracking_alloc(slot, slot->npages);
}
static void update_gfn_track(struct kvm_memory_slot *slot, gfn_t gfn,
enum kvm_page_track_mode mode, short count)
static void update_gfn_write_track(struct kvm_memory_slot *slot, gfn_t gfn,
short count)
{
int index, val;
index = gfn_to_index(gfn, slot->base_gfn, PG_LEVEL_4K);
val = slot->arch.gfn_track[mode][index];
val = slot->arch.gfn_write_track[index];
if (WARN_ON(val + count < 0 || val + count > USHRT_MAX))
if (WARN_ON_ONCE(val + count < 0 || val + count > USHRT_MAX))
return;
slot->arch.gfn_track[mode][index] += count;
slot->arch.gfn_write_track[index] += count;
}
/*
* add guest page to the tracking pool so that corresponding access on that
* page will be intercepted.
*
* It should be called under the protection both of mmu-lock and kvm->srcu
* or kvm->slots_lock.
*
* @kvm: the guest instance we are interested in.
* @slot: the @gfn belongs to.
* @gfn: the guest page.
* @mode: tracking mode, currently only write track is supported.
*/
void kvm_slot_page_track_add_page(struct kvm *kvm,
struct kvm_memory_slot *slot, gfn_t gfn,
enum kvm_page_track_mode mode)
void __kvm_write_track_add_gfn(struct kvm *kvm, struct kvm_memory_slot *slot,
gfn_t gfn)
{
lockdep_assert_held_write(&kvm->mmu_lock);
if (WARN_ON(!page_track_mode_is_valid(mode)))
lockdep_assert_once(lockdep_is_held(&kvm->slots_lock) ||
srcu_read_lock_held(&kvm->srcu));
if (KVM_BUG_ON(!kvm_page_track_write_tracking_enabled(kvm), kvm))
return;
if (WARN_ON(mode == KVM_PAGE_TRACK_WRITE &&
!kvm_page_track_write_tracking_enabled(kvm)))
return;
update_gfn_track(slot, gfn, mode, 1);
update_gfn_write_track(slot, gfn, 1);
/*
* new track stops large page mapping for the
@ -132,37 +93,22 @@ void kvm_slot_page_track_add_page(struct kvm *kvm,
*/
kvm_mmu_gfn_disallow_lpage(slot, gfn);
if (mode == KVM_PAGE_TRACK_WRITE)
if (kvm_mmu_slot_gfn_write_protect(kvm, slot, gfn, PG_LEVEL_4K))
kvm_flush_remote_tlbs(kvm);
if (kvm_mmu_slot_gfn_write_protect(kvm, slot, gfn, PG_LEVEL_4K))
kvm_flush_remote_tlbs(kvm);
}
EXPORT_SYMBOL_GPL(kvm_slot_page_track_add_page);
/*
* remove the guest page from the tracking pool which stops the interception
* of corresponding access on that page. It is the opposed operation of
* kvm_slot_page_track_add_page().
*
* It should be called under the protection both of mmu-lock and kvm->srcu
* or kvm->slots_lock.
*
* @kvm: the guest instance we are interested in.
* @slot: the @gfn belongs to.
* @gfn: the guest page.
* @mode: tracking mode, currently only write track is supported.
*/
void kvm_slot_page_track_remove_page(struct kvm *kvm,
struct kvm_memory_slot *slot, gfn_t gfn,
enum kvm_page_track_mode mode)
void __kvm_write_track_remove_gfn(struct kvm *kvm,
struct kvm_memory_slot *slot, gfn_t gfn)
{
if (WARN_ON(!page_track_mode_is_valid(mode)))
lockdep_assert_held_write(&kvm->mmu_lock);
lockdep_assert_once(lockdep_is_held(&kvm->slots_lock) ||
srcu_read_lock_held(&kvm->srcu));
if (KVM_BUG_ON(!kvm_page_track_write_tracking_enabled(kvm), kvm))
return;
if (WARN_ON(mode == KVM_PAGE_TRACK_WRITE &&
!kvm_page_track_write_tracking_enabled(kvm)))
return;
update_gfn_track(slot, gfn, mode, -1);
update_gfn_write_track(slot, gfn, -1);
/*
* allow large page mapping for the tracked page
@ -170,31 +116,26 @@ void kvm_slot_page_track_remove_page(struct kvm *kvm,
*/
kvm_mmu_gfn_allow_lpage(slot, gfn);
}
EXPORT_SYMBOL_GPL(kvm_slot_page_track_remove_page);
/*
* check if the corresponding access on the specified guest page is tracked.
*/
bool kvm_slot_page_track_is_active(struct kvm *kvm,
const struct kvm_memory_slot *slot,
gfn_t gfn, enum kvm_page_track_mode mode)
bool kvm_gfn_is_write_tracked(struct kvm *kvm,
const struct kvm_memory_slot *slot, gfn_t gfn)
{
int index;
if (WARN_ON(!page_track_mode_is_valid(mode)))
return false;
if (!slot)
return false;
if (mode == KVM_PAGE_TRACK_WRITE &&
!kvm_page_track_write_tracking_enabled(kvm))
if (!kvm_page_track_write_tracking_enabled(kvm))
return false;
index = gfn_to_index(gfn, slot->base_gfn, PG_LEVEL_4K);
return !!READ_ONCE(slot->arch.gfn_track[mode][index]);
return !!READ_ONCE(slot->arch.gfn_write_track[index]);
}
#ifdef CONFIG_KVM_EXTERNAL_WRITE_TRACKING
void kvm_page_track_cleanup(struct kvm *kvm)
{
struct kvm_page_track_notifier_head *head;
@ -216,17 +157,22 @@ int kvm_page_track_init(struct kvm *kvm)
* register the notifier so that event interception for the tracked guest
* pages can be received.
*/
void
kvm_page_track_register_notifier(struct kvm *kvm,
struct kvm_page_track_notifier_node *n)
int kvm_page_track_register_notifier(struct kvm *kvm,
struct kvm_page_track_notifier_node *n)
{
struct kvm_page_track_notifier_head *head;
if (!kvm || kvm->mm != current->mm)
return -ESRCH;
kvm_get_kvm(kvm);
head = &kvm->arch.track_notifier_head;
write_lock(&kvm->mmu_lock);
hlist_add_head_rcu(&n->node, &head->track_notifier_list);
write_unlock(&kvm->mmu_lock);
return 0;
}
EXPORT_SYMBOL_GPL(kvm_page_track_register_notifier);
@ -234,9 +180,8 @@ EXPORT_SYMBOL_GPL(kvm_page_track_register_notifier);
* stop receiving the event interception. It is the opposed operation of
* kvm_page_track_register_notifier().
*/
void
kvm_page_track_unregister_notifier(struct kvm *kvm,
struct kvm_page_track_notifier_node *n)
void kvm_page_track_unregister_notifier(struct kvm *kvm,
struct kvm_page_track_notifier_node *n)
{
struct kvm_page_track_notifier_head *head;
@ -246,6 +191,8 @@ kvm_page_track_unregister_notifier(struct kvm *kvm,
hlist_del_rcu(&n->node);
write_unlock(&kvm->mmu_lock);
synchronize_srcu(&head->track_srcu);
kvm_put_kvm(kvm);
}
EXPORT_SYMBOL_GPL(kvm_page_track_unregister_notifier);
@ -256,34 +203,7 @@ EXPORT_SYMBOL_GPL(kvm_page_track_unregister_notifier);
* The node should figure out if the written page is the one that node is
* interested in by itself.
*/
void kvm_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new,
int bytes)
{
struct kvm_page_track_notifier_head *head;
struct kvm_page_track_notifier_node *n;
int idx;
head = &vcpu->kvm->arch.track_notifier_head;
if (hlist_empty(&head->track_notifier_list))
return;
idx = srcu_read_lock(&head->track_srcu);
hlist_for_each_entry_srcu(n, &head->track_notifier_list, node,
srcu_read_lock_held(&head->track_srcu))
if (n->track_write)
n->track_write(vcpu, gpa, new, bytes, n);
srcu_read_unlock(&head->track_srcu, idx);
}
/*
* Notify the node that memory slot is being removed or moved so that it can
* drop write-protection for the pages in the memory slot.
*
* The node should figure out it has any write-protected pages in this slot
* by itself.
*/
void kvm_page_track_flush_slot(struct kvm *kvm, struct kvm_memory_slot *slot)
void __kvm_page_track_write(struct kvm *kvm, gpa_t gpa, const u8 *new, int bytes)
{
struct kvm_page_track_notifier_head *head;
struct kvm_page_track_notifier_node *n;
@ -296,8 +216,92 @@ void kvm_page_track_flush_slot(struct kvm *kvm, struct kvm_memory_slot *slot)
idx = srcu_read_lock(&head->track_srcu);
hlist_for_each_entry_srcu(n, &head->track_notifier_list, node,
srcu_read_lock_held(&head->track_srcu))
if (n->track_flush_slot)
n->track_flush_slot(kvm, slot, n);
srcu_read_lock_held(&head->track_srcu))
if (n->track_write)
n->track_write(gpa, new, bytes, n);
srcu_read_unlock(&head->track_srcu, idx);
}
/*
* Notify external page track nodes that a memory region is being removed from
* the VM, e.g. so that users can free any associated metadata.
*/
void kvm_page_track_delete_slot(struct kvm *kvm, struct kvm_memory_slot *slot)
{
struct kvm_page_track_notifier_head *head;
struct kvm_page_track_notifier_node *n;
int idx;
head = &kvm->arch.track_notifier_head;
if (hlist_empty(&head->track_notifier_list))
return;
idx = srcu_read_lock(&head->track_srcu);
hlist_for_each_entry_srcu(n, &head->track_notifier_list, node,
srcu_read_lock_held(&head->track_srcu))
if (n->track_remove_region)
n->track_remove_region(slot->base_gfn, slot->npages, n);
srcu_read_unlock(&head->track_srcu, idx);
}
/*
* add guest page to the tracking pool so that corresponding access on that
* page will be intercepted.
*
* @kvm: the guest instance we are interested in.
* @gfn: the guest page.
*/
int kvm_write_track_add_gfn(struct kvm *kvm, gfn_t gfn)
{
struct kvm_memory_slot *slot;
int idx;
idx = srcu_read_lock(&kvm->srcu);
slot = gfn_to_memslot(kvm, gfn);
if (!slot) {
srcu_read_unlock(&kvm->srcu, idx);
return -EINVAL;
}
write_lock(&kvm->mmu_lock);
__kvm_write_track_add_gfn(kvm, slot, gfn);
write_unlock(&kvm->mmu_lock);
srcu_read_unlock(&kvm->srcu, idx);
return 0;
}
EXPORT_SYMBOL_GPL(kvm_write_track_add_gfn);
/*
* remove the guest page from the tracking pool which stops the interception
* of corresponding access on that page.
*
* @kvm: the guest instance we are interested in.
* @gfn: the guest page.
*/
int kvm_write_track_remove_gfn(struct kvm *kvm, gfn_t gfn)
{
struct kvm_memory_slot *slot;
int idx;
idx = srcu_read_lock(&kvm->srcu);
slot = gfn_to_memslot(kvm, gfn);
if (!slot) {
srcu_read_unlock(&kvm->srcu, idx);
return -EINVAL;
}
write_lock(&kvm->mmu_lock);
__kvm_write_track_remove_gfn(kvm, slot, gfn);
write_unlock(&kvm->mmu_lock);
srcu_read_unlock(&kvm->srcu, idx);
return 0;
}
EXPORT_SYMBOL_GPL(kvm_write_track_remove_gfn);
#endif

58
arch/x86/kvm/mmu/page_track.h Normal file
View File

@ -0,0 +1,58 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __KVM_X86_PAGE_TRACK_H
#define __KVM_X86_PAGE_TRACK_H
#include <linux/kvm_host.h>
#include <asm/kvm_page_track.h>
bool kvm_page_track_write_tracking_enabled(struct kvm *kvm);
int kvm_page_track_write_tracking_alloc(struct kvm_memory_slot *slot);
void kvm_page_track_free_memslot(struct kvm_memory_slot *slot);
int kvm_page_track_create_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot,
unsigned long npages);
void __kvm_write_track_add_gfn(struct kvm *kvm, struct kvm_memory_slot *slot,
gfn_t gfn);
void __kvm_write_track_remove_gfn(struct kvm *kvm,
struct kvm_memory_slot *slot, gfn_t gfn);
bool kvm_gfn_is_write_tracked(struct kvm *kvm,
const struct kvm_memory_slot *slot, gfn_t gfn);
#ifdef CONFIG_KVM_EXTERNAL_WRITE_TRACKING
int kvm_page_track_init(struct kvm *kvm);
void kvm_page_track_cleanup(struct kvm *kvm);
void __kvm_page_track_write(struct kvm *kvm, gpa_t gpa, const u8 *new, int bytes);
void kvm_page_track_delete_slot(struct kvm *kvm, struct kvm_memory_slot *slot);
static inline bool kvm_page_track_has_external_user(struct kvm *kvm)
{
return !hlist_empty(&kvm->arch.track_notifier_head.track_notifier_list);
}
#else
static inline int kvm_page_track_init(struct kvm *kvm) { return 0; }
static inline void kvm_page_track_cleanup(struct kvm *kvm) { }
static inline void __kvm_page_track_write(struct kvm *kvm, gpa_t gpa,
const u8 *new, int bytes) { }
static inline void kvm_page_track_delete_slot(struct kvm *kvm,
struct kvm_memory_slot *slot) { }
static inline bool kvm_page_track_has_external_user(struct kvm *kvm) { return false; }
#endif /* CONFIG_KVM_EXTERNAL_WRITE_TRACKING */
static inline void kvm_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa,
const u8 *new, int bytes)
{
__kvm_page_track_write(vcpu->kvm, gpa, new, bytes);
kvm_mmu_track_write(vcpu, gpa, new, bytes);
}
#endif /* __KVM_X86_PAGE_TRACK_H */

41
arch/x86/kvm/mmu/paging_tmpl.h
View File

@ -338,7 +338,6 @@ retry_walk:
}
#endif
walker->max_level = walker->level;
ASSERT(!(is_long_mode(vcpu) && !is_pae(vcpu)));
/*
* FIXME: on Intel processors, loads of the PDPTE registers for PAE paging
@ -348,9 +347,21 @@ retry_walk:
nested_access = (have_ad ? PFERR_WRITE_MASK : 0) | PFERR_USER_MASK;
pte_access = ~0;
/*
* Queue a page fault for injection if this assertion fails, as callers
* assume that walker.fault contains sane info on a walk failure. I.e.
* avoid making the situation worse by inducing even worse badness
* between when the assertion fails and when KVM kicks the vCPU out to
* userspace (because the VM is bugged).
*/
if (KVM_BUG_ON(is_long_mode(vcpu) && !is_pae(vcpu), vcpu->kvm))
goto error;
++walker->level;
do {
struct kvm_memory_slot *slot;
unsigned long host_addr;
pt_access = pte_access;
@ -381,7 +392,11 @@ retry_walk:
if (unlikely(real_gpa == INVALID_GPA))
return 0;
host_addr = kvm_vcpu_gfn_to_hva_prot(vcpu, gpa_to_gfn(real_gpa),
slot = kvm_vcpu_gfn_to_memslot(vcpu, gpa_to_gfn(real_gpa));
if (!kvm_is_visible_memslot(slot))
goto error;
host_addr = gfn_to_hva_memslot_prot(slot, gpa_to_gfn(real_gpa),
&walker->pte_writable[walker->level - 1]);
if (unlikely(kvm_is_error_hva(host_addr)))
goto error;
@ -456,9 +471,6 @@ retry_walk:
goto retry_walk;
}
pgprintk("%s: pte %llx pte_access %x pt_access %x\n",
__func__, (u64)pte, walker->pte_access,
walker->pt_access[walker->level - 1]);
return 1;
error:
@ -529,8 +541,6 @@ FNAME(prefetch_gpte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
if (FNAME(prefetch_invalid_gpte)(vcpu, sp, spte, gpte))
return false;
pgprintk("%s: gpte %llx spte %p\n", __func__, (u64)gpte, spte);
gfn = gpte_to_gfn(gpte);
pte_access = sp->role.access & FNAME(gpte_access)(gpte);
FNAME(protect_clean_gpte)(vcpu->arch.mmu, &pte_access, gpte);
@ -638,9 +648,20 @@ static int FNAME(fetch)(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault,
if (FNAME(gpte_changed)(vcpu, gw, top_level))
goto out_gpte_changed;
if (WARN_ON(!VALID_PAGE(vcpu->arch.mmu->root.hpa)))
if (WARN_ON_ONCE(!VALID_PAGE(vcpu->arch.mmu->root.hpa)))
goto out_gpte_changed;
/*
* Load a new root and retry the faulting instruction in the extremely
* unlikely scenario that the guest root gfn became visible between
* loading a dummy root and handling the resulting page fault, e.g. if
* userspace create a memslot in the interim.
*/
if (unlikely(kvm_mmu_is_dummy_root(vcpu->arch.mmu->root.hpa))) {
kvm_make_request(KVM_REQ_MMU_FREE_OBSOLETE_ROOTS, vcpu);
goto out_gpte_changed;
}
for_each_shadow_entry(vcpu, fault->addr, it) {
gfn_t table_gfn;
@ -758,7 +779,6 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault
struct guest_walker walker;
int r;
pgprintk("%s: addr %lx err %x\n", __func__, fault->addr, fault->error_code);
WARN_ON_ONCE(fault->is_tdp);
/*
@ -773,7 +793,6 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault
* The page is not mapped by the guest. Let the guest handle it.
*/
if (!r) {
pgprintk("%s: guest page fault\n", __func__);
if (!fault->prefetch)
kvm_inject_emulated_page_fault(vcpu, &walker.fault);
@ -837,7 +856,7 @@ static gpa_t FNAME(get_level1_sp_gpa)(struct kvm_mmu_page *sp)
{
int offset = 0;
WARN_ON(sp->role.level != PG_LEVEL_4K);
WARN_ON_ONCE(sp->role.level != PG_LEVEL_4K);
if (PTTYPE == 32)
offset = sp->role.quadrant << SPTE_LEVEL_BITS;

6
arch/x86/kvm/mmu/spte.c
View File

@ -61,7 +61,7 @@ static u64 generation_mmio_spte_mask(u64 gen)
{
u64 mask;
WARN_ON(gen & ~MMIO_SPTE_GEN_MASK);
WARN_ON_ONCE(gen & ~MMIO_SPTE_GEN_MASK);
mask = (gen << MMIO_SPTE_GEN_LOW_SHIFT) & MMIO_SPTE_GEN_LOW_MASK;
mask |= (gen << MMIO_SPTE_GEN_HIGH_SHIFT) & MMIO_SPTE_GEN_HIGH_MASK;
@ -221,8 +221,6 @@ bool make_spte(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
* shadow pages and unsync'ing pages is not allowed.
*/
if (mmu_try_to_unsync_pages(vcpu->kvm, slot, gfn, can_unsync, prefetch)) {
pgprintk("%s: found shadow page for %llx, marking ro\n",
__func__, gfn);
wrprot = true;
pte_access &= ~ACC_WRITE_MASK;
spte &= ~(PT_WRITABLE_MASK | shadow_mmu_writable_mask);
@ -242,7 +240,7 @@ out:
if ((spte & PT_WRITABLE_MASK) && kvm_slot_dirty_track_enabled(slot)) {
/* Enforced by kvm_mmu_hugepage_adjust. */
WARN_ON(level > PG_LEVEL_4K);
WARN_ON_ONCE(level > PG_LEVEL_4K);
mark_page_dirty_in_slot(vcpu->kvm, slot, gfn);
}

21
arch/x86/kvm/mmu/spte.h
View File

@ -3,6 +3,7 @@
#ifndef KVM_X86_MMU_SPTE_H
#define KVM_X86_MMU_SPTE_H
#include "mmu.h"
#include "mmu_internal.h"
/*
@ -236,6 +237,18 @@ static inline struct kvm_mmu_page *sptep_to_sp(u64 *sptep)
return to_shadow_page(__pa(sptep));
}
static inline struct kvm_mmu_page *root_to_sp(hpa_t root)
{
if (kvm_mmu_is_dummy_root(root))
return NULL;
/*
* The "root" may be a special root, e.g. a PAE entry, treat it as a
* SPTE to ensure any non-PA bits are dropped.
*/
return spte_to_child_sp(root);
}
static inline bool is_mmio_spte(u64 spte)
{
return (spte & shadow_mmio_mask) == shadow_mmio_value &&
@ -265,13 +278,13 @@ static inline bool sp_ad_disabled(struct kvm_mmu_page *sp)
static inline bool spte_ad_enabled(u64 spte)
{
MMU_WARN_ON(!is_shadow_present_pte(spte));
KVM_MMU_WARN_ON(!is_shadow_present_pte(spte));
return (spte & SPTE_TDP_AD_MASK) != SPTE_TDP_AD_DISABLED;
}
static inline bool spte_ad_need_write_protect(u64 spte)
{
MMU_WARN_ON(!is_shadow_present_pte(spte));
KVM_MMU_WARN_ON(!is_shadow_present_pte(spte));
/*
* This is benign for non-TDP SPTEs as SPTE_TDP_AD_ENABLED is '0',
* and non-TDP SPTEs will never set these bits. Optimize for 64-bit
@ -282,13 +295,13 @@ static inline bool spte_ad_need_write_protect(u64 spte)
static inline u64 spte_shadow_accessed_mask(u64 spte)
{
MMU_WARN_ON(!is_shadow_present_pte(spte));
KVM_MMU_WARN_ON(!is_shadow_present_pte(spte));
return spte_ad_enabled(spte) ? shadow_accessed_mask : 0;
}
static inline u64 spte_shadow_dirty_mask(u64 spte)
{
MMU_WARN_ON(!is_shadow_present_pte(spte));
KVM_MMU_WARN_ON(!is_shadow_present_pte(spte));
return spte_ad_enabled(spte) ? shadow_dirty_mask : 0;
}

11
arch/x86/kvm/mmu/tdp_iter.c
View File

@ -39,13 +39,14 @@ void tdp_iter_restart(struct tdp_iter *iter)
void tdp_iter_start(struct tdp_iter *iter, struct kvm_mmu_page *root,
int min_level, gfn_t next_last_level_gfn)
{
int root_level = root->role.level;
WARN_ON(root_level < 1);
WARN_ON(root_level > PT64_ROOT_MAX_LEVEL);
if (WARN_ON_ONCE(!root || (root->role.level < 1) ||
(root->role.level > PT64_ROOT_MAX_LEVEL))) {
iter->valid = false;
return;
}
iter->next_last_level_gfn = next_last_level_gfn;
iter->root_level = root_level;
iter->root_level = root->role.level;
iter->min_level = min_level;
iter->pt_path[iter->root_level - 1] = (tdp_ptep_t)root->spt;
iter->as_id = kvm_mmu_page_as_id(root);

37
arch/x86/kvm/mmu/tdp_mmu.c
View File

@ -475,9 +475,9 @@ static void handle_changed_spte(struct kvm *kvm, int as_id, gfn_t gfn,
bool is_leaf = is_present && is_last_spte(new_spte, level);
bool pfn_changed = spte_to_pfn(old_spte) != spte_to_pfn(new_spte);
WARN_ON(level > PT64_ROOT_MAX_LEVEL);
WARN_ON(level < PG_LEVEL_4K);
WARN_ON(gfn & (KVM_PAGES_PER_HPAGE(level) - 1));
WARN_ON_ONCE(level > PT64_ROOT_MAX_LEVEL);
WARN_ON_ONCE(level < PG_LEVEL_4K);
WARN_ON_ONCE(gfn & (KVM_PAGES_PER_HPAGE(level) - 1));
/*
* If this warning were to trigger it would indicate that there was a
@ -522,9 +522,9 @@ static void handle_changed_spte(struct kvm *kvm, int as_id, gfn_t gfn,
* impact the guest since both the former and current SPTEs
* are nonpresent.
*/
if (WARN_ON(!is_mmio_spte(old_spte) &&
!is_mmio_spte(new_spte) &&
!is_removed_spte(new_spte)))
if (WARN_ON_ONCE(!is_mmio_spte(old_spte) &&
!is_mmio_spte(new_spte) &&
!is_removed_spte(new_spte)))
pr_err("Unexpected SPTE change! Nonpresent SPTEs\n"
"should not be replaced with another,\n"
"different nonpresent SPTE, unless one or both\n"
@ -661,7 +661,7 @@ static u64 tdp_mmu_set_spte(struct kvm *kvm, int as_id, tdp_ptep_t sptep,
* should be used. If operating under the MMU lock in write mode, the
* use of the removed SPTE should not be necessary.
*/
WARN_ON(is_removed_spte(old_spte) || is_removed_spte(new_spte));
WARN_ON_ONCE(is_removed_spte(old_spte) || is_removed_spte(new_spte));
old_spte = kvm_tdp_mmu_write_spte(sptep, old_spte, new_spte, level);
@ -689,7 +689,7 @@ static inline void tdp_mmu_iter_set_spte(struct kvm *kvm, struct tdp_iter *iter,
else
#define tdp_mmu_for_each_pte(_iter, _mmu, _start, _end) \
for_each_tdp_pte(_iter, to_shadow_page(_mmu->root.hpa), _start, _end)
for_each_tdp_pte(_iter, root_to_sp(_mmu->root.hpa), _start, _end)
/*
* Yield if the MMU lock is contended or this thread needs to return control
@ -709,7 +709,7 @@ static inline bool __must_check tdp_mmu_iter_cond_resched(struct kvm *kvm,
struct tdp_iter *iter,
bool flush, bool shared)
{
WARN_ON(iter->yielded);
WARN_ON_ONCE(iter->yielded);
/* Ensure forward progress has been made before yielding. */
if (iter->next_last_level_gfn == iter->yielded_gfn)
@ -728,7 +728,7 @@ static inline bool __must_check tdp_mmu_iter_cond_resched(struct kvm *kvm,
rcu_read_lock();
WARN_ON(iter->gfn > iter->next_last_level_gfn);
WARN_ON_ONCE(iter->gfn > iter->next_last_level_gfn);
iter->yielded = true;
}
@ -1241,7 +1241,7 @@ static bool set_spte_gfn(struct kvm *kvm, struct tdp_iter *iter,
u64 new_spte;
/* Huge pages aren't expected to be modified without first being zapped. */
WARN_ON(pte_huge(range->pte) || range->start + 1 != range->end);
WARN_ON_ONCE(pte_huge(range->arg.pte) || range->start + 1 != range->end);
if (iter->level != PG_LEVEL_4K ||
!is_shadow_present_pte(iter->old_spte))
@ -1255,9 +1255,9 @@ static bool set_spte_gfn(struct kvm *kvm, struct tdp_iter *iter,
*/
tdp_mmu_iter_set_spte(kvm, iter, 0);
if (!pte_write(range->pte)) {
if (!pte_write(range->arg.pte)) {
new_spte = kvm_mmu_changed_pte_notifier_make_spte(iter->old_spte,
pte_pfn(range->pte));
pte_pfn(range->arg.pte));
tdp_mmu_iter_set_spte(kvm, iter, new_spte);
}
@ -1548,8 +1548,8 @@ retry:
if (!is_shadow_present_pte(iter.old_spte))
continue;
MMU_WARN_ON(kvm_ad_enabled() &&
spte_ad_need_write_protect(iter.old_spte));
KVM_MMU_WARN_ON(kvm_ad_enabled() &&
spte_ad_need_write_protect(iter.old_spte));
if (!(iter.old_spte & dbit))
continue;
@ -1600,6 +1600,8 @@ static void clear_dirty_pt_masked(struct kvm *kvm, struct kvm_mmu_page *root,
shadow_dirty_mask;
struct tdp_iter iter;
lockdep_assert_held_write(&kvm->mmu_lock);
rcu_read_lock();
tdp_root_for_each_leaf_pte(iter, root, gfn + __ffs(mask),
@ -1607,8 +1609,8 @@ static void clear_dirty_pt_masked(struct kvm *kvm, struct kvm_mmu_page *root,
if (!mask)
break;
MMU_WARN_ON(kvm_ad_enabled() &&
spte_ad_need_write_protect(iter.old_spte));
KVM_MMU_WARN_ON(kvm_ad_enabled() &&
spte_ad_need_write_protect(iter.old_spte));
if (iter.level > PG_LEVEL_4K ||
!(mask & (1UL << (iter.gfn - gfn))))
@ -1646,7 +1648,6 @@ void kvm_tdp_mmu_clear_dirty_pt_masked(struct kvm *kvm,
{
struct kvm_mmu_page *root;
lockdep_assert_held_write(&kvm->mmu_lock);
for_each_tdp_mmu_root(kvm, root, slot->as_id)
clear_dirty_pt_masked(kvm, root, gfn, mask, wrprot);
}

4
arch/x86/kvm/pmu.c
View File

@ -382,9 +382,6 @@ static bool check_pmu_event_filter(struct kvm_pmc *pmc)
struct kvm_x86_pmu_event_filter *filter;
struct kvm *kvm = pmc->vcpu->kvm;
if (!static_call(kvm_x86_pmu_hw_event_available)(pmc))
return false;
filter = srcu_dereference(kvm->arch.pmu_event_filter, &kvm->srcu);
if (!filter)
return true;
@ -398,6 +395,7 @@ static bool check_pmu_event_filter(struct kvm_pmc *pmc)
static bool pmc_event_is_allowed(struct kvm_pmc *pmc)
{
return pmc_is_globally_enabled(pmc) && pmc_speculative_in_use(pmc) &&
static_call(kvm_x86_pmu_hw_event_available)(pmc) &&
check_pmu_event_filter(pmc);
}

1
arch/x86/kvm/reverse_cpuid.h
View File

@ -43,6 +43,7 @@ enum kvm_only_cpuid_leafs {
/* Intel-defined sub-features, CPUID level 0x00000007:1 (EDX) */
#define X86_FEATURE_AVX_VNNI_INT8 KVM_X86_FEATURE(CPUID_7_1_EDX, 4)
#define X86_FEATURE_AVX_NE_CONVERT KVM_X86_FEATURE(CPUID_7_1_EDX, 5)
#define X86_FEATURE_AMX_COMPLEX KVM_X86_FEATURE(CPUID_7_1_EDX, 8)
#define X86_FEATURE_PREFETCHITI KVM_X86_FEATURE(CPUID_7_1_EDX, 14)
/* CPUID level 0x80000007 (EDX). */

59
arch/x86/kvm/svm/avic.c
View File

@ -791,6 +791,7 @@ static int svm_ir_list_add(struct vcpu_svm *svm, struct amd_iommu_pi_data *pi)
int ret = 0;
unsigned long flags;
struct amd_svm_iommu_ir *ir;
u64 entry;
/**
* In some cases, the existing irte is updated and re-set,
@ -824,6 +825,18 @@ static int svm_ir_list_add(struct vcpu_svm *svm, struct amd_iommu_pi_data *pi)
ir->data = pi->ir_data;
spin_lock_irqsave(&svm->ir_list_lock, flags);
/*
* Update the target pCPU for IOMMU doorbells if the vCPU is running.
* If the vCPU is NOT running, i.e. is blocking or scheduled out, KVM
* will update the pCPU info when the vCPU awkened and/or scheduled in.
* See also avic_vcpu_load().
*/
entry = READ_ONCE(*(svm->avic_physical_id_cache));
if (entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK)
amd_iommu_update_ga(entry & AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK,
true, pi->ir_data);
list_add(&ir->node, &svm->ir_list);
spin_unlock_irqrestore(&svm->ir_list_lock, flags);
out:
@ -986,10 +999,11 @@ static inline int
avic_update_iommu_vcpu_affinity(struct kvm_vcpu *vcpu, int cpu, bool r)
{
int ret = 0;
unsigned long flags;
struct amd_svm_iommu_ir *ir;
struct vcpu_svm *svm = to_svm(vcpu);
lockdep_assert_held(&svm->ir_list_lock);
if (!kvm_arch_has_assigned_device(vcpu->kvm))
return 0;
@ -997,19 +1011,15 @@ avic_update_iommu_vcpu_affinity(struct kvm_vcpu *vcpu, int cpu, bool r)
* Here, we go through the per-vcpu ir_list to update all existing
* interrupt remapping table entry targeting this vcpu.
*/
spin_lock_irqsave(&svm->ir_list_lock, flags);
if (list_empty(&svm->ir_list))
goto out;
return 0;
list_for_each_entry(ir, &svm->ir_list, node) {
ret = amd_iommu_update_ga(cpu, r, ir->data);
if (ret)
break;
return ret;
}
out:
spin_unlock_irqrestore(&svm->ir_list_lock, flags);
return ret;
return 0;
}
void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
@ -1017,6 +1027,7 @@ void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
u64 entry;
int h_physical_id = kvm_cpu_get_apicid(cpu);
struct vcpu_svm *svm = to_svm(vcpu);
unsigned long flags;
lockdep_assert_preemption_disabled();
@ -1033,6 +1044,15 @@ void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
if (kvm_vcpu_is_blocking(vcpu))
return;
/*
* Grab the per-vCPU interrupt remapping lock even if the VM doesn't
* _currently_ have assigned devices, as that can change. Holding
* ir_list_lock ensures that either svm_ir_list_add() will consume
* up-to-date entry information, or that this task will wait until
* svm_ir_list_add() completes to set the new target pCPU.
*/
spin_lock_irqsave(&svm->ir_list_lock, flags);
entry = READ_ONCE(*(svm->avic_physical_id_cache));
WARN_ON_ONCE(entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK);
@ -1042,25 +1062,48 @@ void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
WRITE_ONCE(*(svm->avic_physical_id_cache), entry);
avic_update_iommu_vcpu_affinity(vcpu, h_physical_id, true);
spin_unlock_irqrestore(&svm->ir_list_lock, flags);
}
void avic_vcpu_put(struct kvm_vcpu *vcpu)
{
u64 entry;
struct vcpu_svm *svm = to_svm(vcpu);
unsigned long flags;
lockdep_assert_preemption_disabled();
/*
* Note, reading the Physical ID entry outside of ir_list_lock is safe
* as only the pCPU that has loaded (or is loading) the vCPU is allowed
* to modify the entry, and preemption is disabled. I.e. the vCPU
* can't be scheduled out and thus avic_vcpu_{put,load}() can't run
* recursively.
*/
entry = READ_ONCE(*(svm->avic_physical_id_cache));
/* Nothing to do if IsRunning == '0' due to vCPU blocking. */
if (!(entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK))
return;
/*
* Take and hold the per-vCPU interrupt remapping lock while updating
* the Physical ID entry even though the lock doesn't protect against
* multiple writers (see above). Holding ir_list_lock ensures that
* either svm_ir_list_add() will consume up-to-date entry information,
* or that this task will wait until svm_ir_list_add() completes to
* mark the vCPU as not running.
*/
spin_lock_irqsave(&svm->ir_list_lock, flags);
avic_update_iommu_vcpu_affinity(vcpu, -1, 0);
entry &= ~AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK;
WRITE_ONCE(*(svm->avic_physical_id_cache), entry);
spin_unlock_irqrestore(&svm->ir_list_lock, flags);
}
void avic_refresh_virtual_apic_mode(struct kvm_vcpu *vcpu)

57
arch/x86/kvm/svm/nested.c
View File

@ -107,7 +107,7 @@ static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu)
static bool nested_vmcb_needs_vls_intercept(struct vcpu_svm *svm)
{
if (!svm->v_vmload_vmsave_enabled)
if (!guest_can_use(&svm->vcpu, X86_FEATURE_V_VMSAVE_VMLOAD))
return true;
if (!nested_npt_enabled(svm))
@ -552,6 +552,7 @@ static void nested_vmcb02_prepare_save(struct vcpu_svm *svm, struct vmcb *vmcb12
bool new_vmcb12 = false;
struct vmcb *vmcb01 = svm->vmcb01.ptr;
struct vmcb *vmcb02 = svm->nested.vmcb02.ptr;
struct kvm_vcpu *vcpu = &svm->vcpu;
nested_vmcb02_compute_g_pat(svm);
@ -577,18 +578,18 @@ static void nested_vmcb02_prepare_save(struct vcpu_svm *svm, struct vmcb *vmcb12
vmcb_mark_dirty(vmcb02, VMCB_DT);
}
kvm_set_rflags(&svm->vcpu, vmcb12->save.rflags | X86_EFLAGS_FIXED);
kvm_set_rflags(vcpu, vmcb12->save.rflags | X86_EFLAGS_FIXED);
svm_set_efer(&svm->vcpu, svm->nested.save.efer);
svm_set_efer(vcpu, svm->nested.save.efer);
svm_set_cr0(&svm->vcpu, svm->nested.save.cr0);
svm_set_cr4(&svm->vcpu, svm->nested.save.cr4);
svm_set_cr0(vcpu, svm->nested.save.cr0);
svm_set_cr4(vcpu, svm->nested.save.cr4);
svm->vcpu.arch.cr2 = vmcb12->save.cr2;
kvm_rax_write(&svm->vcpu, vmcb12->save.rax);
kvm_rsp_write(&svm->vcpu, vmcb12->save.rsp);
kvm_rip_write(&svm->vcpu, vmcb12->save.rip);
kvm_rax_write(vcpu, vmcb12->save.rax);
kvm_rsp_write(vcpu, vmcb12->save.rsp);
kvm_rip_write(vcpu, vmcb12->save.rip);
/* In case we don't even reach vcpu_run, the fields are not updated */
vmcb02->save.rax = vmcb12->save.rax;
@ -602,7 +603,8 @@ static void nested_vmcb02_prepare_save(struct vcpu_svm *svm, struct vmcb *vmcb12
vmcb_mark_dirty(vmcb02, VMCB_DR);
}
if (unlikely(svm->lbrv_enabled && (svm->nested.ctl.virt_ext & LBR_CTL_ENABLE_MASK))) {
if (unlikely(guest_can_use(vcpu, X86_FEATURE_LBRV) &&
(svm->nested.ctl.virt_ext & LBR_CTL_ENABLE_MASK))) {
/*
* Reserved bits of DEBUGCTL are ignored. Be consistent with
* svm_set_msr's definition of reserved bits.
@ -658,7 +660,8 @@ static void nested_vmcb02_prepare_control(struct vcpu_svm *svm,
* exit_int_info, exit_int_info_err, next_rip, insn_len, insn_bytes.
*/
if (svm->vgif_enabled && (svm->nested.ctl.int_ctl & V_GIF_ENABLE_MASK))
if (guest_can_use(vcpu, X86_FEATURE_VGIF) &&
(svm->nested.ctl.int_ctl & V_GIF_ENABLE_MASK))
int_ctl_vmcb12_bits |= (V_GIF_MASK | V_GIF_ENABLE_MASK);
else
int_ctl_vmcb01_bits |= (V_GIF_MASK | V_GIF_ENABLE_MASK);
@ -695,10 +698,9 @@ static void nested_vmcb02_prepare_control(struct vcpu_svm *svm,
vmcb02->control.tsc_offset = vcpu->arch.tsc_offset;
if (svm->tsc_ratio_msr != kvm_caps.default_tsc_scaling_ratio) {
WARN_ON(!svm->tsc_scaling_enabled);
if (guest_can_use(vcpu, X86_FEATURE_TSCRATEMSR) &&
svm->tsc_ratio_msr != kvm_caps.default_tsc_scaling_ratio)
nested_svm_update_tsc_ratio_msr(vcpu);
}
vmcb02->control.int_ctl =
(svm->nested.ctl.int_ctl & int_ctl_vmcb12_bits) |
@ -717,7 +719,7 @@ static void nested_vmcb02_prepare_control(struct vcpu_svm *svm,
* what a nrips=0 CPU would do (L1 is responsible for advancing RIP
* prior to injecting the event).
*/
if (svm->nrips_enabled)
if (guest_can_use(vcpu, X86_FEATURE_NRIPS))
vmcb02->control.next_rip = svm->nested.ctl.next_rip;
else if (boot_cpu_has(X86_FEATURE_NRIPS))
vmcb02->control.next_rip = vmcb12_rip;
@ -727,7 +729,7 @@ static void nested_vmcb02_prepare_control(struct vcpu_svm *svm,
svm->soft_int_injected = true;
svm->soft_int_csbase = vmcb12_csbase;
svm->soft_int_old_rip = vmcb12_rip;
if (svm->nrips_enabled)
if (guest_can_use(vcpu, X86_FEATURE_NRIPS))
svm->soft_int_next_rip = svm->nested.ctl.next_rip;
else
svm->soft_int_next_rip = vmcb12_rip;
@ -735,15 +737,21 @@ static void nested_vmcb02_prepare_control(struct vcpu_svm *svm,
vmcb02->control.virt_ext = vmcb01->control.virt_ext &
LBR_CTL_ENABLE_MASK;
if (svm->lbrv_enabled)
if (guest_can_use(vcpu, X86_FEATURE_LBRV))
vmcb02->control.virt_ext |=
(svm->nested.ctl.virt_ext & LBR_CTL_ENABLE_MASK);
if (!nested_vmcb_needs_vls_intercept(svm))
vmcb02->control.virt_ext |= VIRTUAL_VMLOAD_VMSAVE_ENABLE_MASK;
pause_count12 = svm->pause_filter_enabled ? svm->nested.ctl.pause_filter_count : 0;
pause_thresh12 = svm->pause_threshold_enabled ? svm->nested.ctl.pause_filter_thresh : 0;
if (guest_can_use(vcpu, X86_FEATURE_PAUSEFILTER))
pause_count12 = svm->nested.ctl.pause_filter_count;
else
pause_count12 = 0;
if (guest_can_use(vcpu, X86_FEATURE_PFTHRESHOLD))
pause_thresh12 = svm->nested.ctl.pause_filter_thresh;
else
pause_thresh12 = 0;
if (kvm_pause_in_guest(svm->vcpu.kvm)) {
/* use guest values since host doesn't intercept PAUSE */
vmcb02->control.pause_filter_count = pause_count12;
@ -1027,7 +1035,7 @@ int nested_svm_vmexit(struct vcpu_svm *svm)
if (vmcb12->control.exit_code != SVM_EXIT_ERR)
nested_save_pending_event_to_vmcb12(svm, vmcb12);
if (svm->nrips_enabled)
if (guest_can_use(vcpu, X86_FEATURE_NRIPS))
vmcb12->control.next_rip = vmcb02->control.next_rip;
vmcb12->control.int_ctl = svm->nested.ctl.int_ctl;
@ -1066,7 +1074,8 @@ int nested_svm_vmexit(struct vcpu_svm *svm)
if (!nested_exit_on_intr(svm))
kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
if (unlikely(svm->lbrv_enabled && (svm->nested.ctl.virt_ext & LBR_CTL_ENABLE_MASK))) {
if (unlikely(guest_can_use(vcpu, X86_FEATURE_LBRV) &&
(svm->nested.ctl.virt_ext & LBR_CTL_ENABLE_MASK))) {
svm_copy_lbrs(vmcb12, vmcb02);
svm_update_lbrv(vcpu);
} else if (unlikely(vmcb01->control.virt_ext & LBR_CTL_ENABLE_MASK)) {
@ -1101,10 +1110,10 @@ int nested_svm_vmexit(struct vcpu_svm *svm)
vmcb_mark_dirty(vmcb01, VMCB_INTERCEPTS);
}
if (svm->tsc_ratio_msr != kvm_caps.default_tsc_scaling_ratio) {
WARN_ON(!svm->tsc_scaling_enabled);
if (kvm_caps.has_tsc_control &&
vcpu->arch.tsc_scaling_ratio != vcpu->arch.l1_tsc_scaling_ratio) {
vcpu->arch.tsc_scaling_ratio = vcpu->arch.l1_tsc_scaling_ratio;
__svm_write_tsc_multiplier(vcpu->arch.tsc_scaling_ratio);
svm_write_tsc_multiplier(vcpu);
}
svm->nested.ctl.nested_cr3 = 0;
@ -1537,7 +1546,7 @@ void nested_svm_update_tsc_ratio_msr(struct kvm_vcpu *vcpu)
vcpu->arch.tsc_scaling_ratio =
kvm_calc_nested_tsc_multiplier(vcpu->arch.l1_tsc_scaling_ratio,
svm->tsc_ratio_msr);
__svm_write_tsc_multiplier(vcpu->arch.tsc_scaling_ratio);
svm_write_tsc_multiplier(vcpu);
}
/* Inverse operation of nested_copy_vmcb_control_to_cache(). asid is copied too. */

100
arch/x86/kvm/svm/sev.c
View File

@ -23,6 +23,7 @@
#include <asm/pkru.h>
#include <asm/trapnr.h>
#include <asm/fpu/xcr.h>
#include <asm/debugreg.h>
#include "mmu.h"
#include "x86.h"
@ -54,9 +55,14 @@ module_param_named(sev, sev_enabled, bool, 0444);
/* enable/disable SEV-ES support */
static bool sev_es_enabled = true;
module_param_named(sev_es, sev_es_enabled, bool, 0444);
/* enable/disable SEV-ES DebugSwap support */
static bool sev_es_debug_swap_enabled = true;
module_param_named(debug_swap, sev_es_debug_swap_enabled, bool, 0444);
#else
#define sev_enabled false
#define sev_es_enabled false
#define sev_es_debug_swap_enabled false
#endif /* CONFIG_KVM_AMD_SEV */
static u8 sev_enc_bit;
@ -606,6 +612,9 @@ static int sev_es_sync_vmsa(struct vcpu_svm *svm)
save->xss = svm->vcpu.arch.ia32_xss;
save->dr6 = svm->vcpu.arch.dr6;
if (sev_es_debug_swap_enabled)
save->sev_features |= SVM_SEV_FEAT_DEBUG_SWAP;
pr_debug("Virtual Machine Save Area (VMSA):\n");
print_hex_dump_debug("", DUMP_PREFIX_NONE, 16, 1, save, sizeof(*save), false);
@ -619,6 +628,11 @@ static int __sev_launch_update_vmsa(struct kvm *kvm, struct kvm_vcpu *vcpu,
struct vcpu_svm *svm = to_svm(vcpu);
int ret;
if (vcpu->guest_debug) {
pr_warn_once("KVM_SET_GUEST_DEBUG for SEV-ES guest is not supported");
return -EINVAL;
}
/* Perform some pre-encryption checks against the VMSA */
ret = sev_es_sync_vmsa(svm);
if (ret)
@ -1725,7 +1739,7 @@ static void sev_migrate_from(struct kvm *dst_kvm, struct kvm *src_kvm)
* Note, the source is not required to have the same number of
* vCPUs as the destination when migrating a vanilla SEV VM.
*/
src_vcpu = kvm_get_vcpu(dst_kvm, i);
src_vcpu = kvm_get_vcpu(src_kvm, i);
src_svm = to_svm(src_vcpu);
/*
@ -2171,7 +2185,7 @@ void __init sev_hardware_setup(void)
bool sev_es_supported = false;
bool sev_supported = false;
if (!sev_enabled || !npt_enabled)
if (!sev_enabled || !npt_enabled || !nrips)
goto out;
/*
@ -2256,6 +2270,9 @@ out:
sev_enabled = sev_supported;
sev_es_enabled = sev_es_supported;
if (!sev_es_enabled || !cpu_feature_enabled(X86_FEATURE_DEBUG_SWAP) ||
!cpu_feature_enabled(X86_FEATURE_NO_NESTED_DATA_BP))
sev_es_debug_swap_enabled = false;
#endif
}
@ -2881,7 +2898,10 @@ int sev_handle_vmgexit(struct kvm_vcpu *vcpu)
svm->sev_es.ghcb_sa);
break;
case SVM_VMGEXIT_NMI_COMPLETE:
ret = svm_invoke_exit_handler(vcpu, SVM_EXIT_IRET);
++vcpu->stat.nmi_window_exits;
svm->nmi_masked = false;
kvm_make_request(KVM_REQ_EVENT, vcpu);
ret = 1;
break;
case SVM_VMGEXIT_AP_HLT_LOOP:
ret = kvm_emulate_ap_reset_hold(vcpu);
@ -2944,6 +2964,7 @@ int sev_es_string_io(struct vcpu_svm *svm, int size, unsigned int port, int in)
static void sev_es_init_vmcb(struct vcpu_svm *svm)
{
struct vmcb *vmcb = svm->vmcb01.ptr;
struct kvm_vcpu *vcpu = &svm->vcpu;
svm->vmcb->control.nested_ctl |= SVM_NESTED_CTL_SEV_ES_ENABLE;
@ -2952,9 +2973,12 @@ static void sev_es_init_vmcb(struct vcpu_svm *svm)
/*
* An SEV-ES guest requires a VMSA area that is a separate from the
* VMCB page. Do not include the encryption mask on the VMSA physical
* address since hardware will access it using the guest key.
* address since hardware will access it using the guest key. Note,
* the VMSA will be NULL if this vCPU is the destination for intrahost
* migration, and will be copied later.
*/
svm->vmcb->control.vmsa_pa = __pa(svm->sev_es.vmsa);
if (svm->sev_es.vmsa)
svm->vmcb->control.vmsa_pa = __pa(svm->sev_es.vmsa);
/* Can't intercept CR register access, HV can't modify CR registers */
svm_clr_intercept(svm, INTERCEPT_CR0_READ);
@ -2972,8 +2996,23 @@ static void sev_es_init_vmcb(struct vcpu_svm *svm)
svm_set_intercept(svm, TRAP_CR4_WRITE);
svm_set_intercept(svm, TRAP_CR8_WRITE);
/* No support for enable_vmware_backdoor */
clr_exception_intercept(svm, GP_VECTOR);
vmcb->control.intercepts[INTERCEPT_DR] = 0;
if (!sev_es_debug_swap_enabled) {
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR7_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR7_WRITE);
recalc_intercepts(svm);
} else {
/*
* Disable #DB intercept iff DebugSwap is enabled. KVM doesn't
* allow debugging SEV-ES guests, and enables DebugSwap iff
* NO_NESTED_DATA_BP is supported, so there's no reason to
* intercept #DB when DebugSwap is enabled. For simplicity
* with respect to guest debug, intercept #DB for other VMs
* even if NO_NESTED_DATA_BP is supported, i.e. even if the
* guest can't DoS the CPU with infinite #DB vectoring.
*/
clr_exception_intercept(svm, DB_VECTOR);
}
/* Can't intercept XSETBV, HV can't modify XCR0 directly */
svm_clr_intercept(svm, INTERCEPT_XSETBV);
@ -3000,6 +3039,12 @@ void sev_init_vmcb(struct vcpu_svm *svm)
svm->vmcb->control.nested_ctl |= SVM_NESTED_CTL_SEV_ENABLE;
clr_exception_intercept(svm, UD_VECTOR);
/*
* Don't intercept #GP for SEV guests, e.g. for the VMware backdoor, as
* KVM can't decrypt guest memory to decode the faulting instruction.
*/
clr_exception_intercept(svm, GP_VECTOR);
if (sev_es_guest(svm->vcpu.kvm))
sev_es_init_vmcb(svm);
}
@ -3018,20 +3063,41 @@ void sev_es_vcpu_reset(struct vcpu_svm *svm)
void sev_es_prepare_switch_to_guest(struct sev_es_save_area *hostsa)
{
/*
* As an SEV-ES guest, hardware will restore the host state on VMEXIT,
* of which one step is to perform a VMLOAD. KVM performs the
* corresponding VMSAVE in svm_prepare_guest_switch for both
* traditional and SEV-ES guests.
* All host state for SEV-ES guests is categorized into three swap types
* based on how it is handled by hardware during a world switch:
*
* A: VMRUN: Host state saved in host save area
* VMEXIT: Host state loaded from host save area
*
* B: VMRUN: Host state _NOT_ saved in host save area
* VMEXIT: Host state loaded from host save area
*
* C: VMRUN: Host state _NOT_ saved in host save area
* VMEXIT: Host state initialized to default(reset) values
*
* Manually save type-B state, i.e. state that is loaded by VMEXIT but
* isn't saved by VMRUN, that isn't already saved by VMSAVE (performed
* by common SVM code).
*/
/* XCR0 is restored on VMEXIT, save the current host value */
hostsa->xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK);
/* PKRU is restored on VMEXIT, save the current host value */
hostsa->pkru = read_pkru();
/* MSR_IA32_XSS is restored on VMEXIT, save the currnet host value */
hostsa->xss = host_xss;
/*
* If DebugSwap is enabled, debug registers are loaded but NOT saved by
* the CPU (Type-B). If DebugSwap is disabled/unsupported, the CPU both
* saves and loads debug registers (Type-A).
*/
if (sev_es_debug_swap_enabled) {
hostsa->dr0 = native_get_debugreg(0);
hostsa->dr1 = native_get_debugreg(1);
hostsa->dr2 = native_get_debugreg(2);
hostsa->dr3 = native_get_debugreg(3);
hostsa->dr0_addr_mask = amd_get_dr_addr_mask(0);
hostsa->dr1_addr_mask = amd_get_dr_addr_mask(1);
hostsa->dr2_addr_mask = amd_get_dr_addr_mask(2);
hostsa->dr3_addr_mask = amd_get_dr_addr_mask(3);
}
}
void sev_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector)

327
arch/x86/kvm/svm/svm.c
View File

@ -39,10 +39,9 @@
#include <asm/spec-ctrl.h>
#include <asm/cpu_device_id.h>
#include <asm/traps.h>
#include <asm/reboot.h>
#include <asm/fpu/api.h>
#include <asm/virtext.h>
#include <trace/events/ipi.h>
#include "trace.h"
@ -203,7 +202,7 @@ static int nested = true;
module_param(nested, int, S_IRUGO);
/* enable/disable Next RIP Save */
static int nrips = true;
int nrips = true;
module_param(nrips, int, 0444);
/* enable/disable Virtual VMLOAD VMSAVE */
@ -365,6 +364,8 @@ static void svm_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
svm->vmcb->control.int_state |= SVM_INTERRUPT_SHADOW_MASK;
}
static bool svm_can_emulate_instruction(struct kvm_vcpu *vcpu, int emul_type,
void *insn, int insn_len);
static int __svm_skip_emulated_instruction(struct kvm_vcpu *vcpu,
bool commit_side_effects)
@ -385,6 +386,14 @@ static int __svm_skip_emulated_instruction(struct kvm_vcpu *vcpu,
}
if (!svm->next_rip) {
/*
* FIXME: Drop this when kvm_emulate_instruction() does the
* right thing and treats "can't emulate" as outright failure
* for EMULTYPE_SKIP.
*/
if (!svm_can_emulate_instruction(vcpu, EMULTYPE_SKIP, NULL, 0))
return 0;
if (unlikely(!commit_side_effects))
old_rflags = svm->vmcb->save.rflags;
@ -517,14 +526,21 @@ static void svm_init_osvw(struct kvm_vcpu *vcpu)
vcpu->arch.osvw.status |= 1;
}
static bool kvm_is_svm_supported(void)
static bool __kvm_is_svm_supported(void)
{
int cpu = raw_smp_processor_id();
const char *msg;
int cpu = smp_processor_id();
struct cpuinfo_x86 *c = &cpu_data(cpu);
u64 vm_cr;
if (!cpu_has_svm(&msg)) {
pr_err("SVM not supported by CPU %d, %s\n", cpu, msg);
if (c->x86_vendor != X86_VENDOR_AMD &&
c->x86_vendor != X86_VENDOR_HYGON) {
pr_err("CPU %d isn't AMD or Hygon\n", cpu);
return false;
}
if (!cpu_has(c, X86_FEATURE_SVM)) {
pr_err("SVM not supported by CPU %d\n", cpu);
return false;
}
@ -542,25 +558,55 @@ static bool kvm_is_svm_supported(void)
return true;
}
static bool kvm_is_svm_supported(void)
{
bool supported;
migrate_disable();
supported = __kvm_is_svm_supported();
migrate_enable();
return supported;
}
static int svm_check_processor_compat(void)
{
if (!kvm_is_svm_supported())
if (!__kvm_is_svm_supported())
return -EIO;
return 0;
}
void __svm_write_tsc_multiplier(u64 multiplier)
static void __svm_write_tsc_multiplier(u64 multiplier)
{
preempt_disable();
if (multiplier == __this_cpu_read(current_tsc_ratio))
goto out;
return;
wrmsrl(MSR_AMD64_TSC_RATIO, multiplier);
__this_cpu_write(current_tsc_ratio, multiplier);
out:
preempt_enable();
}
static inline void kvm_cpu_svm_disable(void)
{
uint64_t efer;
wrmsrl(MSR_VM_HSAVE_PA, 0);
rdmsrl(MSR_EFER, efer);
if (efer & EFER_SVME) {
/*
* Force GIF=1 prior to disabling SVM, e.g. to ensure INIT and
* NMI aren't blocked.
*/
stgi();
wrmsrl(MSR_EFER, efer & ~EFER_SVME);
}
}
static void svm_emergency_disable(void)
{
kvm_rebooting = true;
kvm_cpu_svm_disable();
}
static void svm_hardware_disable(void)
@ -569,7 +615,7 @@ static void svm_hardware_disable(void)
if (tsc_scaling)
__svm_write_tsc_multiplier(SVM_TSC_RATIO_DEFAULT);
cpu_svm_disable();
kvm_cpu_svm_disable();
amd_pmu_disable_virt();
}
@ -677,6 +723,39 @@ free_save_area:
}
static void set_dr_intercepts(struct vcpu_svm *svm)
{
struct vmcb *vmcb = svm->vmcb01.ptr;
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR0_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR1_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR2_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR3_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR4_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR5_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR6_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR0_WRITE);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR1_WRITE);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR2_WRITE);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR3_WRITE);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR4_WRITE);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR5_WRITE);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR6_WRITE);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR7_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR7_WRITE);
recalc_intercepts(svm);
}
static void clr_dr_intercepts(struct vcpu_svm *svm)
{
struct vmcb *vmcb = svm->vmcb01.ptr;
vmcb->control.intercepts[INTERCEPT_DR] = 0;
recalc_intercepts(svm);
}
static int direct_access_msr_slot(u32 msr)
{
u32 i;
@ -947,50 +1026,24 @@ static void svm_disable_lbrv(struct kvm_vcpu *vcpu)
svm_copy_lbrs(svm->vmcb01.ptr, svm->vmcb);
}
static int svm_get_lbr_msr(struct vcpu_svm *svm, u32 index)
static struct vmcb *svm_get_lbr_vmcb(struct vcpu_svm *svm)
{
/*
* If the LBR virtualization is disabled, the LBR msrs are always
* kept in the vmcb01 to avoid copying them on nested guest entries.
*
* If nested, and the LBR virtualization is enabled/disabled, the msrs
* are moved between the vmcb01 and vmcb02 as needed.
* If LBR virtualization is disabled, the LBR MSRs are always kept in
* vmcb01. If LBR virtualization is enabled and L1 is running VMs of
* its own, the MSRs are moved between vmcb01 and vmcb02 as needed.
*/
struct vmcb *vmcb =
(svm->vmcb->control.virt_ext & LBR_CTL_ENABLE_MASK) ?
svm->vmcb : svm->vmcb01.ptr;
switch (index) {
case MSR_IA32_DEBUGCTLMSR:
return vmcb->save.dbgctl;
case MSR_IA32_LASTBRANCHFROMIP:
return vmcb->save.br_from;
case MSR_IA32_LASTBRANCHTOIP:
return vmcb->save.br_to;
case MSR_IA32_LASTINTFROMIP:
return vmcb->save.last_excp_from;
case MSR_IA32_LASTINTTOIP:
return vmcb->save.last_excp_to;
default:
KVM_BUG(false, svm->vcpu.kvm,
"%s: Unknown MSR 0x%x", __func__, index);
return 0;
}
return svm->vmcb->control.virt_ext & LBR_CTL_ENABLE_MASK ? svm->vmcb :
svm->vmcb01.ptr;
}
void svm_update_lbrv(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
bool enable_lbrv = svm_get_lbr_msr(svm, MSR_IA32_DEBUGCTLMSR) &
DEBUGCTLMSR_LBR;
bool current_enable_lbrv = !!(svm->vmcb->control.virt_ext &
LBR_CTL_ENABLE_MASK);
if (unlikely(is_guest_mode(vcpu) && svm->lbrv_enabled))
if (unlikely(svm->nested.ctl.virt_ext & LBR_CTL_ENABLE_MASK))
enable_lbrv = true;
bool current_enable_lbrv = svm->vmcb->control.virt_ext & LBR_CTL_ENABLE_MASK;
bool enable_lbrv = (svm_get_lbr_vmcb(svm)->save.dbgctl & DEBUGCTLMSR_LBR) ||
(is_guest_mode(vcpu) && guest_can_use(vcpu, X86_FEATURE_LBRV) &&
(svm->nested.ctl.virt_ext & LBR_CTL_ENABLE_MASK));
if (enable_lbrv == current_enable_lbrv)
return;
@ -1101,21 +1154,23 @@ static u64 svm_get_l2_tsc_multiplier(struct kvm_vcpu *vcpu)
return svm->tsc_ratio_msr;
}
static void svm_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
static void svm_write_tsc_offset(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
svm->vmcb01.ptr->control.tsc_offset = vcpu->arch.l1_tsc_offset;
svm->vmcb->control.tsc_offset = offset;
svm->vmcb->control.tsc_offset = vcpu->arch.tsc_offset;
vmcb_mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
}
static void svm_write_tsc_multiplier(struct kvm_vcpu *vcpu, u64 multiplier)
void svm_write_tsc_multiplier(struct kvm_vcpu *vcpu)
{
__svm_write_tsc_multiplier(multiplier);
preempt_disable();
if (to_svm(vcpu)->guest_state_loaded)
__svm_write_tsc_multiplier(vcpu->arch.tsc_scaling_ratio);
preempt_enable();
}
/* Evaluate instruction intercepts that depend on guest CPUID features. */
static void svm_recalc_instruction_intercepts(struct kvm_vcpu *vcpu,
struct vcpu_svm *svm)
@ -1156,8 +1211,6 @@ static inline void init_vmcb_after_set_cpuid(struct kvm_vcpu *vcpu)
set_msr_interception(vcpu, svm->msrpm, MSR_IA32_SYSENTER_EIP, 0, 0);
set_msr_interception(vcpu, svm->msrpm, MSR_IA32_SYSENTER_ESP, 0, 0);
svm->v_vmload_vmsave_enabled = false;
} else {
/*
* If hardware supports Virtual VMLOAD VMSAVE then enable it
@ -1201,10 +1254,9 @@ static void init_vmcb(struct kvm_vcpu *vcpu)
* Guest access to VMware backdoor ports could legitimately
* trigger #GP because of TSS I/O permission bitmap.
* We intercept those #GP and allow access to them anyway
* as VMware does. Don't intercept #GP for SEV guests as KVM can't
* decrypt guest memory to decode the faulting instruction.
* as VMware does.
*/
if (enable_vmware_backdoor && !sev_guest(vcpu->kvm))
if (enable_vmware_backdoor)
set_exception_intercept(svm, GP_VECTOR);
svm_set_intercept(svm, INTERCEPT_INTR);
@ -1949,7 +2001,7 @@ static void svm_sync_dirty_debug_regs(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
if (vcpu->arch.guest_state_protected)
if (WARN_ON_ONCE(sev_es_guest(vcpu->kvm)))
return;
get_debugreg(vcpu->arch.db[0], 0);
@ -2510,12 +2562,13 @@ static int iret_interception(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
WARN_ON_ONCE(sev_es_guest(vcpu->kvm));
++vcpu->stat.nmi_window_exits;
svm->awaiting_iret_completion = true;
svm_clr_iret_intercept(svm);
if (!sev_es_guest(vcpu->kvm))
svm->nmi_iret_rip = kvm_rip_read(vcpu);
svm->nmi_iret_rip = kvm_rip_read(vcpu);
kvm_make_request(KVM_REQ_EVENT, vcpu);
return 1;
@ -2680,6 +2733,13 @@ static int dr_interception(struct kvm_vcpu *vcpu)
unsigned long val;
int err = 0;
/*
* SEV-ES intercepts DR7 only to disable guest debugging and the guest issues a VMGEXIT
* for DR7 write only. KVM cannot change DR7 (always swapped as type 'A') so return early.
*/
if (sev_es_guest(vcpu->kvm))
return 1;
if (vcpu->guest_debug == 0) {
/*
* No more DR vmexits; force a reload of the debug registers
@ -2764,7 +2824,8 @@ static int svm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
switch (msr_info->index) {
case MSR_AMD64_TSC_RATIO:
if (!msr_info->host_initiated && !svm->tsc_scaling_enabled)
if (!msr_info->host_initiated &&
!guest_can_use(vcpu, X86_FEATURE_TSCRATEMSR))
return 1;
msr_info->data = svm->tsc_ratio_msr;
break;
@ -2802,11 +2863,19 @@ static int svm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
msr_info->data = svm->tsc_aux;
break;
case MSR_IA32_DEBUGCTLMSR:
msr_info->data = svm_get_lbr_vmcb(svm)->save.dbgctl;
break;
case MSR_IA32_LASTBRANCHFROMIP:
msr_info->data = svm_get_lbr_vmcb(svm)->save.br_from;
break;
case MSR_IA32_LASTBRANCHTOIP:
msr_info->data = svm_get_lbr_vmcb(svm)->save.br_to;
break;
case MSR_IA32_LASTINTFROMIP:
msr_info->data = svm_get_lbr_vmcb(svm)->save.last_excp_from;
break;
case MSR_IA32_LASTINTTOIP:
msr_info->data = svm_get_lbr_msr(svm, msr_info->index);
msr_info->data = svm_get_lbr_vmcb(svm)->save.last_excp_to;
break;
case MSR_VM_HSAVE_PA:
msr_info->data = svm->nested.hsave_msr;
@ -2906,7 +2975,7 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
switch (ecx) {
case MSR_AMD64_TSC_RATIO:
if (!svm->tsc_scaling_enabled) {
if (!guest_can_use(vcpu, X86_FEATURE_TSCRATEMSR)) {
if (!msr->host_initiated)
return 1;
@ -2928,7 +2997,8 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
svm->tsc_ratio_msr = data;
if (svm->tsc_scaling_enabled && is_guest_mode(vcpu))
if (guest_can_use(vcpu, X86_FEATURE_TSCRATEMSR) &&
is_guest_mode(vcpu))
nested_svm_update_tsc_ratio_msr(vcpu);
break;
@ -3037,13 +3107,8 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
if (data & DEBUGCTL_RESERVED_BITS)
return 1;
if (svm->vmcb->control.virt_ext & LBR_CTL_ENABLE_MASK)
svm->vmcb->save.dbgctl = data;
else
svm->vmcb01.ptr->save.dbgctl = data;
svm_get_lbr_vmcb(svm)->save.dbgctl = data;
svm_update_lbrv(vcpu);
break;
case MSR_VM_HSAVE_PA:
/*
@ -3769,6 +3834,19 @@ static void svm_enable_nmi_window(struct kvm_vcpu *vcpu)
if (svm_get_nmi_mask(vcpu) && !svm->awaiting_iret_completion)
return; /* IRET will cause a vm exit */
/*
* SEV-ES guests are responsible for signaling when a vCPU is ready to
* receive a new NMI, as SEV-ES guests can't be single-stepped, i.e.
* KVM can't intercept and single-step IRET to detect when NMIs are
* unblocked (architecturally speaking). See SVM_VMGEXIT_NMI_COMPLETE.
*
* Note, GIF is guaranteed to be '1' for SEV-ES guests as hardware
* ignores SEV-ES guest writes to EFER.SVME *and* CLGI/STGI are not
* supported NAEs in the GHCB protocol.
*/
if (sev_es_guest(vcpu->kvm))
return;
if (!gif_set(svm)) {
if (vgif)
svm_set_intercept(svm, INTERCEPT_STGI);
@ -3918,12 +3996,11 @@ static void svm_complete_interrupts(struct kvm_vcpu *vcpu)
svm->soft_int_injected = false;
/*
* If we've made progress since setting HF_IRET_MASK, we've
* If we've made progress since setting awaiting_iret_completion, we've
* executed an IRET and can allow NMI injection.
*/
if (svm->awaiting_iret_completion &&
(sev_es_guest(vcpu->kvm) ||
kvm_rip_read(vcpu) != svm->nmi_iret_rip)) {
kvm_rip_read(vcpu) != svm->nmi_iret_rip) {
svm->awaiting_iret_completion = false;
svm->nmi_masked = false;
kvm_make_request(KVM_REQ_EVENT, vcpu);
@ -4209,28 +4286,37 @@ static void svm_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu)
struct vcpu_svm *svm = to_svm(vcpu);
struct kvm_cpuid_entry2 *best;
vcpu->arch.xsaves_enabled = guest_cpuid_has(vcpu, X86_FEATURE_XSAVE) &&
boot_cpu_has(X86_FEATURE_XSAVE) &&
boot_cpu_has(X86_FEATURE_XSAVES);
/*
* SVM doesn't provide a way to disable just XSAVES in the guest, KVM
* can only disable all variants of by disallowing CR4.OSXSAVE from
* being set. As a result, if the host has XSAVE and XSAVES, and the
* guest has XSAVE enabled, the guest can execute XSAVES without
* faulting. Treat XSAVES as enabled in this case regardless of
* whether it's advertised to the guest so that KVM context switches
* XSS on VM-Enter/VM-Exit. Failure to do so would effectively give
* the guest read/write access to the host's XSS.
*/
if (boot_cpu_has(X86_FEATURE_XSAVE) &&
boot_cpu_has(X86_FEATURE_XSAVES) &&
guest_cpuid_has(vcpu, X86_FEATURE_XSAVE))
kvm_governed_feature_set(vcpu, X86_FEATURE_XSAVES);
/* Update nrips enabled cache */
svm->nrips_enabled = kvm_cpu_cap_has(X86_FEATURE_NRIPS) &&
guest_cpuid_has(vcpu, X86_FEATURE_NRIPS);
kvm_governed_feature_check_and_set(vcpu, X86_FEATURE_NRIPS);
kvm_governed_feature_check_and_set(vcpu, X86_FEATURE_TSCRATEMSR);
kvm_governed_feature_check_and_set(vcpu, X86_FEATURE_LBRV);
svm->tsc_scaling_enabled = tsc_scaling && guest_cpuid_has(vcpu, X86_FEATURE_TSCRATEMSR);
svm->lbrv_enabled = lbrv && guest_cpuid_has(vcpu, X86_FEATURE_LBRV);
/*
* Intercept VMLOAD if the vCPU mode is Intel in order to emulate that
* VMLOAD drops bits 63:32 of SYSENTER (ignoring the fact that exposing
* SVM on Intel is bonkers and extremely unlikely to work).
*/
if (!guest_cpuid_is_intel(vcpu))
kvm_governed_feature_check_and_set(vcpu, X86_FEATURE_V_VMSAVE_VMLOAD);
svm->v_vmload_vmsave_enabled = vls && guest_cpuid_has(vcpu, X86_FEATURE_V_VMSAVE_VMLOAD);
svm->pause_filter_enabled = kvm_cpu_cap_has(X86_FEATURE_PAUSEFILTER) &&
guest_cpuid_has(vcpu, X86_FEATURE_PAUSEFILTER);
svm->pause_threshold_enabled = kvm_cpu_cap_has(X86_FEATURE_PFTHRESHOLD) &&
guest_cpuid_has(vcpu, X86_FEATURE_PFTHRESHOLD);
svm->vgif_enabled = vgif && guest_cpuid_has(vcpu, X86_FEATURE_VGIF);
svm->vnmi_enabled = vnmi && guest_cpuid_has(vcpu, X86_FEATURE_VNMI);
kvm_governed_feature_check_and_set(vcpu, X86_FEATURE_PAUSEFILTER);
kvm_governed_feature_check_and_set(vcpu, X86_FEATURE_PFTHRESHOLD);
kvm_governed_feature_check_and_set(vcpu, X86_FEATURE_VGIF);
kvm_governed_feature_check_and_set(vcpu, X86_FEATURE_VNMI);
svm_recalc_instruction_intercepts(vcpu, svm);
@ -4651,16 +4737,25 @@ static bool svm_can_emulate_instruction(struct kvm_vcpu *vcpu, int emul_type,
* and cannot be decrypted by KVM, i.e. KVM would read cyphertext and
* decode garbage.
*
* Inject #UD if KVM reached this point without an instruction buffer.
* In practice, this path should never be hit by a well-behaved guest,
* e.g. KVM doesn't intercept #UD or #GP for SEV guests, but this path
* is still theoretically reachable, e.g. via unaccelerated fault-like
* AVIC access, and needs to be handled by KVM to avoid putting the
* guest into an infinite loop. Injecting #UD is somewhat arbitrary,
* but its the least awful option given lack of insight into the guest.
* If KVM is NOT trying to simply skip an instruction, inject #UD if
* KVM reached this point without an instruction buffer. In practice,
* this path should never be hit by a well-behaved guest, e.g. KVM
* doesn't intercept #UD or #GP for SEV guests, but this path is still
* theoretically reachable, e.g. via unaccelerated fault-like AVIC
* access, and needs to be handled by KVM to avoid putting the guest
* into an infinite loop. Injecting #UD is somewhat arbitrary, but
* its the least awful option given lack of insight into the guest.
*
* If KVM is trying to skip an instruction, simply resume the guest.
* If a #NPF occurs while the guest is vectoring an INT3/INTO, then KVM
* will attempt to re-inject the INT3/INTO and skip the instruction.
* In that scenario, retrying the INT3/INTO and hoping the guest will
* make forward progress is the only option that has a chance of
* success (and in practice it will work the vast majority of the time).
*/
if (unlikely(!insn)) {
kvm_queue_exception(vcpu, UD_VECTOR);
if (!(emul_type & EMULTYPE_SKIP))
kvm_queue_exception(vcpu, UD_VECTOR);
return false;
}
@ -5112,9 +5207,11 @@ static __init int svm_hardware_setup(void)
svm_adjust_mmio_mask();
nrips = nrips && boot_cpu_has(X86_FEATURE_NRIPS);
/*
* Note, SEV setup consumes npt_enabled and enable_mmio_caching (which
* may be modified by svm_adjust_mmio_mask()).
* may be modified by svm_adjust_mmio_mask()), as well as nrips.
*/
sev_hardware_setup();
@ -5126,11 +5223,6 @@ static __init int svm_hardware_setup(void)
goto err;
}
if (nrips) {
if (!boot_cpu_has(X86_FEATURE_NRIPS))
nrips = false;
}
enable_apicv = avic = avic && avic_hardware_setup();
if (!enable_apicv) {
@ -5213,6 +5305,13 @@ static struct kvm_x86_init_ops svm_init_ops __initdata = {
.pmu_ops = &amd_pmu_ops,
};
static void __svm_exit(void)
{
kvm_x86_vendor_exit();
cpu_emergency_unregister_virt_callback(svm_emergency_disable);
}
static int __init svm_init(void)
{
int r;
@ -5226,6 +5325,8 @@ static int __init svm_init(void)
if (r)
return r;
cpu_emergency_register_virt_callback(svm_emergency_disable);
/*
* Common KVM initialization _must_ come last, after this, /dev/kvm is
* exposed to userspace!
@ -5238,14 +5339,14 @@ static int __init svm_init(void)
return 0;
err_kvm_init:
kvm_x86_vendor_exit();
__svm_exit();
return r;
}
static void __exit svm_exit(void)
{
kvm_exit();
kvm_x86_vendor_exit();
__svm_exit();
}
module_init(svm_init)

61
arch/x86/kvm/svm/svm.h
View File

@ -22,6 +22,7 @@
#include <asm/svm.h>
#include <asm/sev-common.h>
#include "cpuid.h"
#include "kvm_cache_regs.h"
#define __sme_page_pa(x) __sme_set(page_to_pfn(x) << PAGE_SHIFT)
@ -33,6 +34,7 @@
#define MSRPM_OFFSETS 32
extern u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly;
extern bool npt_enabled;
extern int nrips;
extern int vgif;
extern bool intercept_smi;
extern bool x2avic_enabled;
@ -260,16 +262,6 @@ struct vcpu_svm {
unsigned long soft_int_next_rip;
bool soft_int_injected;
/* optional nested SVM features that are enabled for this guest */
bool nrips_enabled : 1;
bool tsc_scaling_enabled : 1;
bool v_vmload_vmsave_enabled : 1;
bool lbrv_enabled : 1;
bool pause_filter_enabled : 1;
bool pause_threshold_enabled : 1;
bool vgif_enabled : 1;
bool vnmi_enabled : 1;
u32 ldr_reg;
u32 dfr_reg;
struct page *avic_backing_page;
@ -406,48 +398,6 @@ static inline bool vmcb12_is_intercept(struct vmcb_ctrl_area_cached *control, u3
return test_bit(bit, (unsigned long *)&control->intercepts);
}
static inline void set_dr_intercepts(struct vcpu_svm *svm)
{
struct vmcb *vmcb = svm->vmcb01.ptr;
if (!sev_es_guest(svm->vcpu.kvm)) {
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR0_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR1_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR2_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR3_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR4_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR5_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR6_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR0_WRITE);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR1_WRITE);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR2_WRITE);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR3_WRITE);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR4_WRITE);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR5_WRITE);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR6_WRITE);
}
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR7_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR7_WRITE);
recalc_intercepts(svm);
}
static inline void clr_dr_intercepts(struct vcpu_svm *svm)
{
struct vmcb *vmcb = svm->vmcb01.ptr;
vmcb->control.intercepts[INTERCEPT_DR] = 0;
/* DR7 access must remain intercepted for an SEV-ES guest */
if (sev_es_guest(svm->vcpu.kvm)) {
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR7_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR7_WRITE);
}
recalc_intercepts(svm);
}
static inline void set_exception_intercept(struct vcpu_svm *svm, u32 bit)
{
struct vmcb *vmcb = svm->vmcb01.ptr;
@ -493,7 +443,8 @@ static inline bool svm_is_intercept(struct vcpu_svm *svm, int bit)
static inline bool nested_vgif_enabled(struct vcpu_svm *svm)
{
return svm->vgif_enabled && (svm->nested.ctl.int_ctl & V_GIF_ENABLE_MASK);
return guest_can_use(&svm->vcpu, X86_FEATURE_VGIF) &&
(svm->nested.ctl.int_ctl & V_GIF_ENABLE_MASK);
}
static inline struct vmcb *get_vgif_vmcb(struct vcpu_svm *svm)
@ -544,7 +495,7 @@ static inline bool nested_npt_enabled(struct vcpu_svm *svm)
static inline bool nested_vnmi_enabled(struct vcpu_svm *svm)
{
return svm->vnmi_enabled &&
return guest_can_use(&svm->vcpu, X86_FEATURE_VNMI) &&
(svm->nested.ctl.int_ctl & V_NMI_ENABLE_MASK);
}
@ -660,7 +611,7 @@ int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
bool has_error_code, u32 error_code);
int nested_svm_exit_special(struct vcpu_svm *svm);
void nested_svm_update_tsc_ratio_msr(struct kvm_vcpu *vcpu);
void __svm_write_tsc_multiplier(u64 multiplier);
void svm_write_tsc_multiplier(struct kvm_vcpu *vcpu);
void nested_copy_vmcb_control_to_cache(struct vcpu_svm *svm,
struct vmcb_control_area *control);
void nested_copy_vmcb_save_to_cache(struct vcpu_svm *svm,

2
arch/x86/kvm/vmx/capabilities.h
View File

@ -252,7 +252,7 @@ static inline bool cpu_has_vmx_pml(void)
static inline bool cpu_has_vmx_xsaves(void)
{
return vmcs_config.cpu_based_2nd_exec_ctrl &
SECONDARY_EXEC_XSAVES;
SECONDARY_EXEC_ENABLE_XSAVES;
}
static inline bool cpu_has_vmx_waitpkg(void)

2
arch/x86/kvm/vmx/hyperv.c
View File

@ -78,7 +78,7 @@
SECONDARY_EXEC_DESC | \
SECONDARY_EXEC_ENABLE_RDTSCP | \
SECONDARY_EXEC_ENABLE_INVPCID | \
SECONDARY_EXEC_XSAVES | \
SECONDARY_EXEC_ENABLE_XSAVES | \
SECONDARY_EXEC_RDSEED_EXITING | \
SECONDARY_EXEC_RDRAND_EXITING | \
SECONDARY_EXEC_TSC_SCALING | \

13
arch/x86/kvm/vmx/nested.c
View File

@ -2307,7 +2307,7 @@ static void prepare_vmcs02_early(struct vcpu_vmx *vmx, struct loaded_vmcs *vmcs0
SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE |
SECONDARY_EXEC_ENABLE_INVPCID |
SECONDARY_EXEC_ENABLE_RDTSCP |
SECONDARY_EXEC_XSAVES |
SECONDARY_EXEC_ENABLE_XSAVES |
SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE |
SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY |
SECONDARY_EXEC_APIC_REGISTER_VIRT |
@ -6331,7 +6331,7 @@ static bool nested_vmx_l1_wants_exit(struct kvm_vcpu *vcpu,
* If if it were, XSS would have to be checked against
* the XSS exit bitmap in vmcs12.
*/
return nested_cpu_has2(vmcs12, SECONDARY_EXEC_XSAVES);
return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_XSAVES);
case EXIT_REASON_UMWAIT:
case EXIT_REASON_TPAUSE:
return nested_cpu_has2(vmcs12,
@ -6426,7 +6426,7 @@ static int vmx_get_nested_state(struct kvm_vcpu *vcpu,
vmx = to_vmx(vcpu);
vmcs12 = get_vmcs12(vcpu);
if (nested_vmx_allowed(vcpu) &&
if (guest_can_use(vcpu, X86_FEATURE_VMX) &&
(vmx->nested.vmxon || vmx->nested.smm.vmxon)) {
kvm_state.hdr.vmx.vmxon_pa = vmx->nested.vmxon_ptr;
kvm_state.hdr.vmx.vmcs12_pa = vmx->nested.current_vmptr;
@ -6567,7 +6567,7 @@ static int vmx_set_nested_state(struct kvm_vcpu *vcpu,
if (kvm_state->flags & ~KVM_STATE_NESTED_EVMCS)
return -EINVAL;
} else {
if (!nested_vmx_allowed(vcpu))
if (!guest_can_use(vcpu, X86_FEATURE_VMX))
return -EINVAL;
if (!page_address_valid(vcpu, kvm_state->hdr.vmx.vmxon_pa))
@ -6601,7 +6601,8 @@ static int vmx_set_nested_state(struct kvm_vcpu *vcpu,
return -EINVAL;
if ((kvm_state->flags & KVM_STATE_NESTED_EVMCS) &&
(!nested_vmx_allowed(vcpu) || !vmx->nested.enlightened_vmcs_enabled))
(!guest_can_use(vcpu, X86_FEATURE_VMX) ||
!vmx->nested.enlightened_vmcs_enabled))
return -EINVAL;
vmx_leave_nested(vcpu);
@ -6874,7 +6875,7 @@ static void nested_vmx_setup_secondary_ctls(u32 ept_caps,
SECONDARY_EXEC_ENABLE_INVPCID |
SECONDARY_EXEC_ENABLE_VMFUNC |
SECONDARY_EXEC_RDSEED_EXITING |
SECONDARY_EXEC_XSAVES |
SECONDARY_EXEC_ENABLE_XSAVES |
SECONDARY_EXEC_TSC_SCALING |
SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE;

2
arch/x86/kvm/vmx/nested.h
View File

@ -168,7 +168,7 @@ static inline int nested_cpu_has_ept(struct vmcs12 *vmcs12)
static inline bool nested_cpu_has_xsaves(struct vmcs12 *vmcs12)
{
return nested_cpu_has2(vmcs12, SECONDARY_EXEC_XSAVES);
return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_XSAVES);
}
static inline bool nested_cpu_has_pml(struct vmcs12 *vmcs12)

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