[PATCH] x86/sev: Fix host kdump support for SNP

Sean Christopherson seanjc at google.com
Thu Aug 29 07:50:16 PDT 2024


On Thu, Aug 29, 2024, Borislav Petkov wrote:
> On August 27, 2024 10:38:04 PM GMT+02:00, Ashish Kalra <Ashish.Kalra at amd.com> wrote:
> >From: Ashish Kalra <ashish.kalra at amd.com>
> >
> >With active SNP VMs, SNP_SHUTDOWN_EX invoked during panic notifiers causes
> >crashkernel boot failure with the following signature:
> 
> Why would SNP_SHUTDOWN be allowed *at all* if there are active SNP guests and
> there's potential to lose guest data in the process?!

Because if the host is panicking, guests are hosed regardless.  Unless I'm
misreading things, the goal here is to ensure the crashkernel can actually capture
a kdump.



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