Commit aae2e722 authored by Jim Mattson's avatar Jim Mattson Committed by Paolo Bonzini
Browse files

KVM: x86: Hide IA32_PLATFORM_DCA_CAP[31:0] from the guest 



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: 24c82e57 ("KVM: Sanitize cpuid")
Signed-off-by: default avatarJim Mattson <jmattson@google.com>
Message-Id: <20220922231854.249383-1-jmattson@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 09636efd

arch/x86/kvm/cpuid.c

+0 −2
Original line number Diff line number Diff line
@@ -902,8 +902,6 @@ 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 */

		union cpuid10_eax eax;

		union cpuid10_edx edx;