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| author | Marcelo Tosatti <mtosatti@redhat.com> | 2014-09-18 18:24:57 -0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-09-24 14:07:50 +0200 |
| commit | bc6134942dbbf31c25e9bd7c876be5da81c9e1ce (patch) | |
| tree | 883797ada98b8affc79b9dc9752b86c6e1aad3ac /arch/x86/kvm/cpuid.c | |
| parent | a2b9e6c1a35afcc0973acb72e591c714e78885ff (diff) | |
| download | linux-bc6134942dbbf31c25e9bd7c876be5da81c9e1ce.tar.gz linux-bc6134942dbbf31c25e9bd7c876be5da81c9e1ce.tar.xz | |
KVM: nested VMX: disable perf cpuid reporting
Initilization of L2 guest with -cpu host, on L1 guest with -cpu host
triggers:
(qemu) KVM: entry failed, hardware error 0x7
...
nested_vmx_run: VMCS MSR_{LOAD,STORE} unsupported
Nested VMX MSR load/store support is not sufficient to
allow perf for L2 guest.
Until properly fixed, trap CPUID and disable function 0xA.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/cpuid.c')
| -rw-r--r-- | arch/x86/kvm/cpuid.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index e28d798f7277..976e3a57f9ea 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -774,6 +774,12 @@ void kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx) if (!best) best = check_cpuid_limit(vcpu, function, index); + /* + * Perfmon not yet supported for L2 guest. + */ + if (is_guest_mode(vcpu) && function == 0xa) + best = NULL; + if (best) { *eax = best->eax; *ebx = best->ebx; |