[Xen-devel] Ping: [PATCH v2 2/2] x86/AMD: limit C1E disable family range

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 05.04.19 at 16:27,  wrote:
> Just like for other family values of 0x17 (see "x86/AMD: correct certain
> Fam17 checks"), commit 3157bb4e13 ("Add MSR support for various feature
> AMD processor families") made the original check for Fam11 here include
> families all the way up to Fam17. The involved MSR (0xC0010055),
> however, is fully reserved starting from Fam16, and the two bits of
> interest are reserved for Fam12 and onwards (albeit I admit I wasn't
> able to find any Fam13 doc). Restore the upper bound to be Fam11.
> 
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> ---
> v2: New.
> 
> --- a/xen/arch/x86/cpu/amd.c
> +++ b/xen/arch/x86/cpu/amd.c
> @@ -628,7 +628,7 @@ static void init_amd(struct cpuinfo_x86
>  
>       switch(c->x86)
>       {
> -     case 0xf ... 0x17:
> +     case 0xf ... 0x11:
>               disable_c1e(NULL);
>               if (acpi_smi_cmd && (acpi_enable_value | acpi_disable_value))
>                       amd_acpi_c1e_quirk = true;
> 
> 





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