Re: [Xen-devel] [PATCH] nested vmx: Intercept guest rdmsr for MSR_IA32_VMX_VMFUNC

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Tue, Jun 07, 2016 at 10:18:38AM +0000, Euan Harris wrote:
> Guest reads of MSR_IA32_VMX_VMFUNC should be handled by
> the logic in vmx_msr_read_intercept().   Otherwise a guest
> can read the raw host value of this MSR, even if nested
> vmx is disabled.
> 
> Signed-off-by: Euan Harris <euan.harris@xxxxxxxxxx>

For 4.7:

Release-acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>

> ---
>  xen/arch/x86/hvm/vmx/vmx.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
> index 743b5a1..6c0721f 100644
> --- a/xen/arch/x86/hvm/vmx/vmx.c
> +++ b/xen/arch/x86/hvm/vmx/vmx.c
> @@ -2624,7 +2624,7 @@ static int vmx_msr_read_intercept(unsigned int msr, 
> uint64_t *msr_content)
>          __vmread(GUEST_IA32_DEBUGCTL, msr_content);
>          break;
>      case IA32_FEATURE_CONTROL_MSR:
> -    case MSR_IA32_VMX_BASIC...MSR_IA32_VMX_TRUE_ENTRY_CTLS:
> +    case MSR_IA32_VMX_BASIC...MSR_IA32_VMX_VMFUNC:
>          if ( !nvmx_msr_read_intercept(msr, msr_content) )
>              goto gp_fault;
>          break;
> -- 
> 1.7.10.4
> 
> 
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