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| author |   Jim Mattson <jmattson@google.com> | 2022-09-22 16:18:54 -0700 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2022-09-30 06:38:01 -0400 |
| commit | aae2e72229cdb21f90df2dbe4244c977e5d3265b (patch) | |
| tree | 03326d1b9bc2126b063fc0580c27bb6960c2cc8f | |
| parent | KVM: selftests: Gracefully handle empty stack traces (diff) | |
| download | wireguard-linux-aae2e72229cdb21f90df2dbe4244c977e5d3265b.tar.xz wireguard-linux-aae2e72229cdb21f90df2dbe4244c977e5d3265b.zip | |
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: 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>
| -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 4c1c2c06e96b..2796dde06302 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -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; |