From: Jim Mattson jmattson@google.com
[ 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 --- arch/x86/kvm/cpuid.c | 2 -- 1 file changed, 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;