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Re: [PATCH for-4.22] x86/ucode: Exclude Zen6 from entrysign digest checking

To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
From: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
Date: Tue, 16 Jun 2026 17:19:59 +0200
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Cc: Jan Beulich <jbeulich@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Teddy Astie <teddy.astie@xxxxxxxxxx>
Delivery-date: Tue, 16 Jun 2026 15:20:10 +0000
List-id: Xen developer discussion <xen-devel.lists.xenproject.org>



On 6/16/26 12:45 PM, Andrew Cooper wrote:

There is a 3rd path which should have gained an is_zen6_uarch() check to
exclude Zen6 from entrysign mitigations.

Fixes: bd15fdedafb3 ("x86/ucode: Exclude Zen6 from entrysign mitigations")
Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Jan Beulich <jbeulich@xxxxxxxx>
CC: Roger Pau Monné <roger.pau@xxxxxxxxxx>
CC: Teddy Astie <teddy.astie@xxxxxxxxxx>
CC: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>

For 4.22.  This wants backporting too.


Release-Acked-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>

Thanks.

~ Oleksii

References:
- [PATCH for-4.22] x86/ucode: Exclude Zen6 from entrysign digest checking
  - From: Andrew Cooper

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