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Re: [PATCH v2 for-4.21 0/2] x86/AMD: deal with RDSEED issues
- To: Jan Beulich <jbeulich@xxxxxxxx>
- From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Date: Fri, 31 Oct 2025 11:22:20 +0100
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
- Delivery-date: Fri, 31 Oct 2025 10:22:43 +0000
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On Tue, Oct 28, 2025 at 04:32:17PM +0100, Jan Beulich wrote:
> Both patches also want 'x86/CPU: extend is_forced_cpu_cap()'s "reach"' in
> place.
>
> 1: disable RDSEED on Fam17 model 47 stepping 0
> 2: disable RDSEED on most of Zen5
For both patches: don't we need to set the feature in the max policy
to allow for incoming migrations of guests that have already seen the
feature?
Thanks, Roger.
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