On 01/07/2025 11:53 am, Andrew Cooper wrote:
> diff --git a/xen/include/xen/lib/x86/cpu-policy.h
> b/xen/include/xen/lib/x86/cpu-policy.h
> index f43e1a3b21e9..aeaa16bbc732 100644
> --- a/xen/include/xen/lib/x86/cpu-policy.h
> +++ b/xen/include/xen/lib/x86/cpu-policy.h
> @@ -325,7 +325,10 @@ struc
On 01/07/2025 1:11 pm, Jan Beulich wrote:
> On 01.07.2025 12:53, Andrew Cooper wrote:
>> When support was originally introduced, ebx, ecx and edx were reserved and
>> should have been zeroed in recalculate_misc() to avoid leaking into guests.
>>
>> Since then, fields have been added into ebx. Gues
On 01.07.2025 12:53, Andrew Cooper wrote:
> When support was originally introduced, ebx, ecx and edx were reserved and
> should have been zeroed in recalculate_misc() to avoid leaking into guests.
>
> Since then, fields have been added into ebx. Guests can't load microcode, so
> shouldn't see uco
When support was originally introduced, ebx, ecx and edx were reserved and
should have been zeroed in recalculate_misc() to avoid leaking into guests.
Since then, fields have been added into ebx. Guests can't load microcode, so
shouldn't see ucode_size, and while in principle we do want to suppor
