Re: [Xen-devel] [PATCH] svm: amend c/s 24990:322300fd2ebd (fake BU_CFG MSR on AMD revF)

[Keir Fraser <keir.xen@xxxxxxxxx>]

On 15/03/2012 12:34, "Jan Beulich" <JBeulich@xxxxxxxx> wrote:

> Let's restrict such a hack to the known affected family.
> 
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Acked-by: Keir Fraser <keir@xxxxxxx>

> --- a/xen/arch/x86/hvm/svm/svm.c
> +++ b/xen/arch/x86/hvm/svm/svm.c
> @@ -1505,7 +1505,7 @@ static int svm_msr_read_intercept(unsign
>          if ( rdmsr_safe(msr, *msr_content) == 0 )
>              break;
>  
> -        if ( msr == MSR_F10_BU_CFG )
> +        if ( boot_cpu_data.x86 == 0xf && msr == MSR_F10_BU_CFG )
>          {
>              /* Win2k8 x64 reads this MSR on revF chips, where it
>               * wasn't publically available; it uses a magic constant
> 
> 
> 
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