Re: [PATCH 1/1] KVM: SVM: add rdmsr support for AMD event registers

[Paolo Bonzini <pbonzini@redhat.com>]

Il 13/08/2014 18:06, Wei Huang ha scritto:
> Current KVM only supports RDMSR for K7_EVNTSEL0 and K7_PERFCTR0
> MSRs. Reading the rest MSRs will trigger KVM to inject #GP into
> guest VM. This causes a warning message "Failed to access perfctr
> msr (MSR c0010001 is ffffffffffffffff)" on AMD host. This patch
> adds RDMSR support for all K7_EVNTSELn and K7_PERFCTRn registers
> and thus supresses the warning message.
> 
> Signed-off-by: Wei Huang <wehuang@redhat.com>
> ---
>  arch/x86/kvm/x86.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index ef432f8..3f10ca2 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -2399,7 +2399,13 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
>  	case MSR_K7_HWCR:
>  	case MSR_VM_HSAVE_PA:
>  	case MSR_K7_EVNTSEL0:
> +	case MSR_K7_EVNTSEL1:
> +	case MSR_K7_EVNTSEL2:
> +	case MSR_K7_EVNTSEL3:
>  	case MSR_K7_PERFCTR0:
> +	case MSR_K7_PERFCTR1:
> +	case MSR_K7_PERFCTR2:
> +	case MSR_K7_PERFCTR3:
>  	case MSR_K8_INT_PENDING_MSG:
>  	case MSR_AMD64_NB_CFG:
>  	case MSR_FAM10H_MMIO_CONF_BASE:
> 

Thanks, applying for 3.18.

Paolo