Messages in this thread | | | Date | Mon, 20 Jun 2022 17:34:42 +0200 | Subject | Re: [PATCH 1/2] x86/pat: fix x86_has_pat_wp() | From | Juergen Gross <> |
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On 20.06.22 17:27, Dave Hansen wrote: > On 6/20/22 03:41, Juergen Gross wrote: >>> But I'm only guessing - this needs a *lot* more elaboration and >>> explanation why exactly this is needed. >> >> I will correct the code and update the commit message. > > It would also be great to cover the end-user-visible impact of the bug > and the fix. It _looks_ like it will probably only affect an SEV > system's ability to read some EFI data. That will presumably be pretty > bad because it ends up reading from an encrypted mapping instead of a > decrypted one.
Xen doesn't support SEV guests yet. So the only caveat here would be EFI setting up PAT by itself.
Not sure this is really a real world issue.
Juergen [unhandled content-type:application/pgp-keys][unhandled content-type:application/pgp-signature] | |