[Xen-devel] Ping: [PATCH] x86/CPUID: RSTR_FP_ERR_PTRS depends on FPU

[Jan Beulich <jbeulich@xxxxxxxx>]

On 25.09.2019 17:27, Jan Beulich wrote:
> There's nothing to restore here if there's no FPU in the first place.
> 
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> ---
> To be considered for 4.13 since RSTR_FP_ERR_PTRS support was introduced
> just recently.

And already release-acked by Jürgen.

Jan

> --- a/xen/tools/gen-cpuid.py
> +++ b/xen/tools/gen-cpuid.py
> @@ -168,8 +168,9 @@ def crunch_numbers(state):
>      deps = {
>          # FPU is taken to mean support for the x87 regisers as well as the
>          # instructions.  MMX is documented to alias the %MM registers over 
> the
> -        # x87 %ST registers in hardware.
> -        FPU: [MMX],
> +        # x87 %ST registers in hardware.  Correct restoring of error pointers
> +        # of course makes no sense without there being anything to restore.
> +        FPU: [MMX, RSTR_FP_ERR_PTRS],
>  
>          # The PSE36 feature indicates that reserved bits in a PSE superpage
>          # may be used as extra physical address bits.

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