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linux/arch/x86/kvm
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Sean Christopherson d07898eaf3 KVM: x86: Don't WARN if userspace mucks with RCX during string I/O exit 
Replace a WARN with a comment to call out that userspace can modify RCX
during an exit to userspace to handle string I/O.  KVM doesn't actually
support changing the rep count during an exit, i.e. the scenario can be
ignored, but the WARN needs to go as it's trivial to trigger from
userspace.

Cc: stable@vger.kernel.org
Fixes: 3b27de271839 ("KVM: x86: split the two parts of emulator_pio_in")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20211025201311.1881846-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-12-10 09:38:02 -05:00
..
mmu
KVM: x86/mmu: Retry page fault if root is invalidated by memslot update
2021-12-02 04:12:12 -05:00
svm
KVM: SVM: Do not terminate SEV-ES guests on GHCB validation failure
2021-12-05 03:02:04 -05:00
vmx
KVM: nVMX: Don't use Enlightened MSR Bitmap for L3
2021-12-08 04:53:13 -05:00
cpuid.c
cpuid: kvm_find_kvm_cpuid_features() should be declared 'static'
2021-11-18 02:03:14 -05:00
cpuid.h
KVM: x86: Move reverse CPUID helpers to separate header file
2021-04-26 05:27:13 -04:00
debugfs.c
KVM: X86: Introduce mmu_rmaps_stat per-vm debugfs file
2021-08-20 16:06:11 -04:00
emulate.c
KVM/arm64 updates for Linux 5.16
2021-10-31 02:28:48 -04:00
fpu.h
KVM: x86: Move FPU register accessors into fpu.h
2021-06-17 13:09:24 -04:00
hyperv.c
KVM: x86: Ignore sparse banks size for an "all CPUs", non-sparse IPI req
2021-12-10 07:12:42 -05:00
hyperv.h
KVM: x86: Query vcpu->vcpu_idx directly and drop its accessor
2021-09-22 10:33:11 -04:00
i8254.c
KVM: x86: Migrate the PIT only if vcpu0 is migrated, not any BSP
2021-08-02 11:01:51 -04:00
i8254.h
…
i8259.c
x86: Fix typo s/ECLR/ELCR/ for the PIC register
2021-08-10 23:31:44 +02:00
ioapic.c
kvm: rename KVM_MAX_VCPU_ID to KVM_MAX_VCPU_IDS
2021-09-30 04:27:05 -04:00
ioapic.h
x86/kvm: remove unused ack_notifier callbacks
2021-11-18 07:05:57 -05:00
irq_comm.c
x86: Fix various typos in comments
2021-03-18 15:31:53 +01:00
irq.c
KVM: x86/xen: Add event channel interrupt vector upcall
2021-02-04 14:19:39 +00:00
irq.h
x86/kvm: remove unused ack_notifier callbacks
2021-11-18 07:05:57 -05:00
Kconfig
KVM: x86: add config for non-kvm users of page tracking
2021-10-01 03:44:57 -04:00
kvm_cache_regs.h
KVM: x86: Introduce KVM_GET_SREGS2 / KVM_SET_SREGS2
2021-06-17 13:09:47 -04:00
kvm_emulate.h
KVM: x86: Drop "pre_" from enter/leave_smm() helpers
2021-06-17 13:09:35 -04:00
kvm_onhyperv.c
KVM: x86: hyper-v: Move the remote TLB flush logic out of vmx
2021-06-17 13:09:36 -04:00
kvm_onhyperv.h
KVM: x86: hyper-v: Move the remote TLB flush logic out of vmx
2021-06-17 13:09:36 -04:00
lapic.c
KVM: x86: check PIR even for vCPUs with disabled APICv
2021-11-30 03:52:39 -05:00
lapic.h
KVM: x86: Rename kvm_lapic_enable_pv_eoi()
2021-11-11 10:56:22 -05:00
Makefile
KVM: stats: Add fd-based API to read binary stats data
2021-06-24 11:47:57 -04:00
mmu.h
KVM: X86: Don't unload MMU in kvm_vcpu_flush_tlb_guest()
2021-10-22 05:44:43 -04:00
mtrr.c
KVM: x86: Add helper to consolidate "raw" reserved GPA mask calculations
2021-02-04 09:27:30 -05:00
pmu.c
kvm: x86: Convert return type of *is_valid_rdpmc_ecx() to bool
2021-11-11 10:56:19 -05:00
pmu.h
kvm: x86: Convert return type of *is_valid_rdpmc_ecx() to bool
2021-11-11 10:56:19 -05:00
reverse_cpuid.h
KVM: SEV: Mask CPUID[0x8000001F].eax according to supported features
2021-04-26 05:27:15 -04:00
trace.h
KVM: x86: Get exit_reason as part of kvm_x86_ops.get_exit_info
2021-10-25 06:48:24 -04:00
tss.h
…
x86.c
KVM: x86: Don't WARN if userspace mucks with RCX during string I/O exit
2021-12-10 09:38:02 -05:00
x86.h
KVM: nVMX: Abide to KVM_REQ_TLB_FLUSH_GUEST request on nested vmentry/vmexit
2021-11-26 07:07:49 -05:00
xen.c
KVM: x86: Assume a 64-bit hypercall for guests with protected state
2021-11-18 02:12:13 -05:00
xen.h
KVM: xen: do not use struct gfn_to_hva_cache
2021-08-05 03:31:40 -04:00