diff options
| author | Jim Mattson <jmattson@google.com> | 2022-09-22 16:18:54 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-10-05 10:38:43 +0200 |
| commit | 374d4c307534c5fdd56aa7f1eb2cba67160ac9a2 (patch) | |
| tree | 464d874faca8ad6694f1fcef3eb987f98c68fe7e | |
| parent | a8e6cde5062fb2aff81f86cc0770591714bee545 (diff) | |
KVM: x86: Hide IA32_PLATFORM_DCA_CAP[31:0] from the guest
[ Upstream commit aae2e72229cdb21f90df2dbe4244c977e5d3265b ]
The only thing reported by CPUID.9 is the value of
IA32_PLATFORM_DCA_CAP[31:0] in EAX. This MSR doesn't even exist in the
guest, since CPUID.1:ECX.DCA[bit 18] is clear in the guest.
Clear CPUID.9 in KVM_GET_SUPPORTED_CPUID.
Fixes: 24c82e576b78 ("KVM: Sanitize cpuid")
Signed-off-by: Jim Mattson <jmattson@google.com>
Message-Id: <20220922231854.249383-1-jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | arch/x86/kvm/cpuid.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 6e1ea5e85e59..6f44274aa949 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -661,8 +661,6 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function) entry->edx = 0; } break; - case 9: - break; case 0xa: { /* Architectural Performance Monitoring */ struct x86_pmu_capability cap; union cpuid10_eax eax; |