| Date | Tue, 11 Feb 2020 16:43:21 +0100 | From | Joerg Roedel <> | Subject | Re: [RFC PATCH 00/62] Linux as SEV-ES Guest Support |
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On Tue, Feb 11, 2020 at 03:50:08PM +0100, Peter Zijlstra wrote:
> Oh gawd; so instead of improving the whole NMI situation, AMD went and > made it worse still ?!?
Well, depends on how you want to see it. Under SEV-ES an IRET will not re-open the NMI window, but the guest has to tell the hypervisor explicitly when it is ready to receive new NMIs via the NMI_COMPLETE message. NMIs stay blocked even when an exception happens in the handler, so this could also be seen as a (slight) improvement.
Regards,
Joerg
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