Messages in this thread | | | Subject | Re: [RFC v2-fix-v5 1/1] x86: Skip WBINVD instruction for VM guest | From | "Kuppuswamy, Sathyanarayanan" <> | Date | Wed, 9 Jun 2021 14:42:37 -0700 |
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On 6/9/21 2:38 PM, Dan Williams wrote: >> In TDX guests, these WBINVD operations cause #VE exceptions. For debug, >> it would be ideal for the #VE handler to be able to WARN() when an >> unexpected WBINVD occurs. (<--- problem #2) > ...but it doesn't WARN() it triggers unhandled #VE, unless I missed > another patch that precedes this that turns it into a WARN()? If a > code path expects WBINVD for correct operation and the guest can't > execute that sounds fatal, not a WARN to me.
Yes. It is not WARN. It is a fatal unhandled exception.
>
-- Sathyanarayanan Kuppuswamy Linux Kernel Developer
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