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alistair23-linux/arch/x86/kvm
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Paolo Bonzini 6441fa6178 KVM: x86: avoid incorrect writes to host MSR_IA32_SPEC_CTRL 
If the guest is configured to have SPEC_CTRL but the host does not
(which is a nonsensical configuration but these are not explicitly
forbidden) then a host-initiated MSR write can write vmx->spec_ctrl
(respectively svm->spec_ctrl) and trigger a #GP when KVM tries to
restore the host value of the MSR.  Add a more comprehensive check
for valid bits of SPEC_CTRL, covering host CPUID flags and,
since we are at it and it is more correct that way, guest CPUID
flags too.

For AMD, remove the unnecessary is_guest_mode check around setting
the MSR interception bitmap, so that the code looks the same as
for Intel.

Cc: Jim Mattson <jmattson@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 		2020-01-24 09:18:47 +01:00
..
mmu KVM: x86: fix overlap between SPTE_MMIO_MASK and generation 2020-01-23 09:50:34 +01:00
vmx KVM: x86: avoid incorrect writes to host MSR_IA32_SPEC_CTRL 2020-01-24 09:18:47 +01:00
Kconfig kvm: x86: add host poll control msrs 2019-06-18 11:43:46 +02:00
Makefile KVM: x86: create mmu/ subdirectory 2019-11-21 12:03:50 +01:00
cpuid.c KVM: x86: Refactor and rename bit() to feature_bit() macro 2020-01-21 14:45:28 +01:00
cpuid.h KVM: x86: Refactor and rename bit() to feature_bit() macro 2020-01-21 14:45:28 +01:00
debugfs.c KVM: no need to check return value of debugfs_create functions 2019-08-05 12:55:49 +02:00
emulate.c KVM: x86: Add dedicated emulator helpers for querying CPUID features 2020-01-21 13:58:22 +01:00
hyperv.c KVM: hyperv: Fix some typos in vcpu unimpl info 2020-01-21 13:57:41 +01:00
hyperv.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499 2019-06-19 17:09:53 +02:00
i8254.c kvm: x86: Add memcg accounting to KVM allocations 2019-02-20 22:48:30 +01:00
i8254.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
i8259.c kvm: x86: Add memcg accounting to KVM allocations 2019-02-20 22:48:30 +01:00
ioapic.c KVM: Fix some grammar mistakes 2020-01-21 13:57:37 +01:00
ioapic.h KVM: X86: Move irrelevant declarations out of ioapic.h 2020-01-08 17:33:14 +01:00
irq.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 320 2019-06-05 17:37:05 +02:00
irq.h KVM: X86: Move irrelevant declarations out of ioapic.h 2020-01-08 17:33:14 +01:00
irq_comm.c KVM: LAPIC: micro-optimize fixed mode ipi delivery 2020-01-21 13:57:15 +01:00
kvm_cache_regs.h KVM: x86: Fold decache_cr3() into cache_reg() 2019-10-22 13:34:16 +02:00
lapic.c KVM: Fix some grammar mistakes 2020-01-21 13:57:37 +01:00
lapic.h KVM: X86: Fix callers of kvm_apic_match_dest() to use correct macros 2020-01-08 17:33:15 +01:00
mmu.h kvm: x86: mmu: Recovery of shattered NX large pages 2019-11-04 20:26:00 +01:00
mmu_audit.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499 2019-06-19 17:09:53 +02:00
mmutrace.h KVM: x86: Use gpa_t for cr2/gpa to fix TDP support on 32-bit KVM 2020-01-08 18:16:02 +01:00
mtrr.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499 2019-06-19 17:09:53 +02:00
pmu.c Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 15:42:43 -08:00
pmu.h KVM: VMX: Add helper to check reserved bits in IA32_PERF_GLOBAL_CTRL 2019-11-15 11:44:13 +01:00
pmu_amd.c KVM: x86/vPMU: Add lazy mechanism to release perf_event per vPMC 2019-11-15 11:44:10 +01:00
svm.c KVM: x86: avoid incorrect writes to host MSR_IA32_SPEC_CTRL 2020-01-24 09:18:47 +01:00
trace.h KVM: nVMX: trace nested VM-Enter failures detected by H/W 2019-09-11 17:34:17 +02:00
tss.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
x86.c KVM: x86: avoid incorrect writes to host MSR_IA32_SPEC_CTRL 2020-01-24 09:18:47 +01:00
x86.h KVM: x86: avoid incorrect writes to host MSR_IA32_SPEC_CTRL 2020-01-24 09:18:47 +01:00