Re: [PATCH] x86/amd: Work around Erratum 1386 - XSAVES malfunction on context switch

From: Andrew Cooper
Date: Tue Mar 07 2023 - 13:29:37 EST


On 07/03/2023 5:50 pm, Borislav Petkov wrote:
> On Tue, Mar 07, 2023 at 05:46:43PM +0000, Andrew Cooper wrote:
>> + * Work around Erratum 1386. The XSAVES instruction malfunctions in
>> + * certain circumstances on Zen1/2 uarch, and not all parts have had
>> + * updated microcode at the time of writing (March 2023).
> Any reason for rushing this and not waiting for me to clarify affected
> models first?

Well yes - more and more reports of impacted systems.

Having the full list of affected models is great and all, but how is it
going to change this patch as a workaround ?

~Andrew