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
> ---
> 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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