0c02183427
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
...
231 lines
6.7 KiB
C
231 lines
6.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_X86_KEXEC_H
|
|
#define _ASM_X86_KEXEC_H
|
|
|
|
#ifdef CONFIG_X86_32
|
|
# define PA_CONTROL_PAGE 0
|
|
# define VA_CONTROL_PAGE 1
|
|
# define PA_PGD 2
|
|
# define PA_SWAP_PAGE 3
|
|
# define PAGES_NR 4
|
|
#else
|
|
# define PA_CONTROL_PAGE 0
|
|
# define VA_CONTROL_PAGE 1
|
|
# define PA_TABLE_PAGE 2
|
|
# define PA_SWAP_PAGE 3
|
|
# define PAGES_NR 4
|
|
#endif
|
|
|
|
# define KEXEC_CONTROL_CODE_MAX_SIZE 2048
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <linux/string.h>
|
|
#include <linux/kernel.h>
|
|
|
|
#include <asm/page.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/bootparam.h>
|
|
|
|
struct kimage;
|
|
|
|
/*
|
|
* KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
|
|
* I.e. Maximum page that is mapped directly into kernel memory,
|
|
* and kmap is not required.
|
|
*
|
|
* So far x86_64 is limited to 40 physical address bits.
|
|
*/
|
|
#ifdef CONFIG_X86_32
|
|
/* Maximum physical address we can use pages from */
|
|
# define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
|
|
/* Maximum address we can reach in physical address mode */
|
|
# define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
|
|
/* Maximum address we can use for the control code buffer */
|
|
# define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
|
|
|
|
# define KEXEC_CONTROL_PAGE_SIZE 4096
|
|
|
|
/* The native architecture */
|
|
# define KEXEC_ARCH KEXEC_ARCH_386
|
|
|
|
/* We can also handle crash dumps from 64 bit kernel. */
|
|
# define vmcore_elf_check_arch_cross(x) ((x)->e_machine == EM_X86_64)
|
|
#else
|
|
/* Maximum physical address we can use pages from */
|
|
# define KEXEC_SOURCE_MEMORY_LIMIT (MAXMEM-1)
|
|
/* Maximum address we can reach in physical address mode */
|
|
# define KEXEC_DESTINATION_MEMORY_LIMIT (MAXMEM-1)
|
|
/* Maximum address we can use for the control pages */
|
|
# define KEXEC_CONTROL_MEMORY_LIMIT (MAXMEM-1)
|
|
|
|
/* Allocate one page for the pdp and the second for the code */
|
|
# define KEXEC_CONTROL_PAGE_SIZE (4096UL + 4096UL)
|
|
|
|
/* The native architecture */
|
|
# define KEXEC_ARCH KEXEC_ARCH_X86_64
|
|
#endif
|
|
|
|
/*
|
|
* This function is responsible for capturing register states if coming
|
|
* via panic otherwise just fix up the ss and sp if coming via kernel
|
|
* mode exception.
|
|
*/
|
|
static inline void crash_setup_regs(struct pt_regs *newregs,
|
|
struct pt_regs *oldregs)
|
|
{
|
|
if (oldregs) {
|
|
memcpy(newregs, oldregs, sizeof(*newregs));
|
|
} else {
|
|
#ifdef CONFIG_X86_32
|
|
asm volatile("movl %%ebx,%0" : "=m"(newregs->bx));
|
|
asm volatile("movl %%ecx,%0" : "=m"(newregs->cx));
|
|
asm volatile("movl %%edx,%0" : "=m"(newregs->dx));
|
|
asm volatile("movl %%esi,%0" : "=m"(newregs->si));
|
|
asm volatile("movl %%edi,%0" : "=m"(newregs->di));
|
|
asm volatile("movl %%ebp,%0" : "=m"(newregs->bp));
|
|
asm volatile("movl %%eax,%0" : "=m"(newregs->ax));
|
|
asm volatile("movl %%esp,%0" : "=m"(newregs->sp));
|
|
asm volatile("movl %%ss, %%eax;" :"=a"(newregs->ss));
|
|
asm volatile("movl %%cs, %%eax;" :"=a"(newregs->cs));
|
|
asm volatile("movl %%ds, %%eax;" :"=a"(newregs->ds));
|
|
asm volatile("movl %%es, %%eax;" :"=a"(newregs->es));
|
|
asm volatile("pushfl; popl %0" :"=m"(newregs->flags));
|
|
#else
|
|
asm volatile("movq %%rbx,%0" : "=m"(newregs->bx));
|
|
asm volatile("movq %%rcx,%0" : "=m"(newregs->cx));
|
|
asm volatile("movq %%rdx,%0" : "=m"(newregs->dx));
|
|
asm volatile("movq %%rsi,%0" : "=m"(newregs->si));
|
|
asm volatile("movq %%rdi,%0" : "=m"(newregs->di));
|
|
asm volatile("movq %%rbp,%0" : "=m"(newregs->bp));
|
|
asm volatile("movq %%rax,%0" : "=m"(newregs->ax));
|
|
asm volatile("movq %%rsp,%0" : "=m"(newregs->sp));
|
|
asm volatile("movq %%r8,%0" : "=m"(newregs->r8));
|
|
asm volatile("movq %%r9,%0" : "=m"(newregs->r9));
|
|
asm volatile("movq %%r10,%0" : "=m"(newregs->r10));
|
|
asm volatile("movq %%r11,%0" : "=m"(newregs->r11));
|
|
asm volatile("movq %%r12,%0" : "=m"(newregs->r12));
|
|
asm volatile("movq %%r13,%0" : "=m"(newregs->r13));
|
|
asm volatile("movq %%r14,%0" : "=m"(newregs->r14));
|
|
asm volatile("movq %%r15,%0" : "=m"(newregs->r15));
|
|
asm volatile("movl %%ss, %%eax;" :"=a"(newregs->ss));
|
|
asm volatile("movl %%cs, %%eax;" :"=a"(newregs->cs));
|
|
asm volatile("pushfq; popq %0" :"=m"(newregs->flags));
|
|
#endif
|
|
newregs->ip = _THIS_IP_;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_X86_32
|
|
asmlinkage unsigned long
|
|
relocate_kernel(unsigned long indirection_page,
|
|
unsigned long control_page,
|
|
unsigned long start_address,
|
|
unsigned int has_pae,
|
|
unsigned int preserve_context);
|
|
#else
|
|
unsigned long
|
|
relocate_kernel(unsigned long indirection_page,
|
|
unsigned long page_list,
|
|
unsigned long start_address,
|
|
unsigned int preserve_context,
|
|
unsigned int host_mem_enc_active);
|
|
#endif
|
|
|
|
#define ARCH_HAS_KIMAGE_ARCH
|
|
|
|
#ifdef CONFIG_X86_32
|
|
struct kimage_arch {
|
|
pgd_t *pgd;
|
|
#ifdef CONFIG_X86_PAE
|
|
pmd_t *pmd0;
|
|
pmd_t *pmd1;
|
|
#endif
|
|
pte_t *pte0;
|
|
pte_t *pte1;
|
|
};
|
|
#else
|
|
struct kimage_arch {
|
|
p4d_t *p4d;
|
|
pud_t *pud;
|
|
pmd_t *pmd;
|
|
pte_t *pte;
|
|
};
|
|
#endif /* CONFIG_X86_32 */
|
|
|
|
#ifdef CONFIG_X86_64
|
|
/*
|
|
* Number of elements and order of elements in this structure should match
|
|
* with the ones in arch/x86/purgatory/entry64.S. If you make a change here
|
|
* make an appropriate change in purgatory too.
|
|
*/
|
|
struct kexec_entry64_regs {
|
|
uint64_t rax;
|
|
uint64_t rcx;
|
|
uint64_t rdx;
|
|
uint64_t rbx;
|
|
uint64_t rsp;
|
|
uint64_t rbp;
|
|
uint64_t rsi;
|
|
uint64_t rdi;
|
|
uint64_t r8;
|
|
uint64_t r9;
|
|
uint64_t r10;
|
|
uint64_t r11;
|
|
uint64_t r12;
|
|
uint64_t r13;
|
|
uint64_t r14;
|
|
uint64_t r15;
|
|
uint64_t rip;
|
|
};
|
|
|
|
extern int arch_kexec_post_alloc_pages(void *vaddr, unsigned int pages,
|
|
gfp_t gfp);
|
|
#define arch_kexec_post_alloc_pages arch_kexec_post_alloc_pages
|
|
|
|
extern void arch_kexec_pre_free_pages(void *vaddr, unsigned int pages);
|
|
#define arch_kexec_pre_free_pages arch_kexec_pre_free_pages
|
|
|
|
void arch_kexec_protect_crashkres(void);
|
|
#define arch_kexec_protect_crashkres arch_kexec_protect_crashkres
|
|
|
|
void arch_kexec_unprotect_crashkres(void);
|
|
#define arch_kexec_unprotect_crashkres arch_kexec_unprotect_crashkres
|
|
|
|
#ifdef CONFIG_KEXEC_FILE
|
|
struct purgatory_info;
|
|
int arch_kexec_apply_relocations_add(struct purgatory_info *pi,
|
|
Elf_Shdr *section,
|
|
const Elf_Shdr *relsec,
|
|
const Elf_Shdr *symtab);
|
|
#define arch_kexec_apply_relocations_add arch_kexec_apply_relocations_add
|
|
|
|
int arch_kimage_file_post_load_cleanup(struct kimage *image);
|
|
#define arch_kimage_file_post_load_cleanup arch_kimage_file_post_load_cleanup
|
|
#endif
|
|
#endif
|
|
|
|
extern void kdump_nmi_shootdown_cpus(void);
|
|
|
|
#ifdef CONFIG_CRASH_HOTPLUG
|
|
void arch_crash_handle_hotplug_event(struct kimage *image);
|
|
#define arch_crash_handle_hotplug_event arch_crash_handle_hotplug_event
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
int arch_crash_hotplug_cpu_support(void);
|
|
#define crash_hotplug_cpu_support arch_crash_hotplug_cpu_support
|
|
#endif
|
|
|
|
#ifdef CONFIG_MEMORY_HOTPLUG
|
|
int arch_crash_hotplug_memory_support(void);
|
|
#define crash_hotplug_memory_support arch_crash_hotplug_memory_support
|
|
#endif
|
|
|
|
unsigned int arch_crash_get_elfcorehdr_size(void);
|
|
#define crash_get_elfcorehdr_size arch_crash_get_elfcorehdr_size
|
|
#endif
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* _ASM_X86_KEXEC_H */
|