Messages in this thread | | | Date | Thu, 21 Mar 2024 10:58:08 +1300 | Subject | Re: [PATCH v2 2/5] x86/kexec: do unconditional WBINVD in relocate_kernel() | From | "Huang, Kai" <> |
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On 21/03/2024 10:06 am, Tom Lendacky wrote: > On 3/20/24 15:48, Huang, Kai wrote: >> >>>> Hi Tom, >>>> >>>> I am not aware of kexec() support status for SEV-ES/SEV-SNP guests. >>>> Does patch 1 break them? >>> >>> SNP guests can kexec with some patches that are currently in process >>> around shared to private memory conversions. ES guests can only kexec >>> with a single vCPU. There was a recent patch series to add support >>> for multiple vCPUs. >>> >>> Patch #1 doesn't break either ES or SNP because we still have an IDT >>> and traditional kernel addressing in place, so the #VC can be handled. >> >> How about plain SEV guest? > > A plain SEV guest is fine, since WBINVD is intercepted and would just > exit to the hypervisor (#VC doesn't happen with plain SEV). > > Thanks, > Tom >
Thanks for the info.
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