Re: [PATCH] x86/bugs: Do not enable IBPB at firmware entry when IBPB is not available

From: Borislav Petkov
Date: Thu Jul 28 2022 - 08:36:04 EST


drop stable@

On Thu, Jul 28, 2022 at 09:26:02AM -0300, Thadeu Lima de Souza Cascardo wrote:
> Some cloud hypervisors do not provide IBPB on very recent CPU processors,
> including AMD processors affected by Retbleed.

Which hypervisors are those? How relevant is that use case?

How do I reproduce it here?

Thx.

--
Regards/Gruss,
Boris.

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