Re: [PATCH Part2 v5 00/45] Add AMD Secure Nested Paging (SEV-SNP) Hypervisor Support

Joerg Roedel
2021-11-15T16:22:17Z

On Mon, Nov 15, 2021 at 03:33:03PM +0000, Dr. David Alan Gilbert wrote:
> How would you debug an unexpected access by the host kernel using a
> guests kdump?

The host needs to log the access in some way (trace-event, pr_err) with
relevant information.

And with the guest-side kdump you can rule out that it was a guest bug
which triggered the access. And you learn what the guest was trying to
do when it triggered the access. This also helps finding the issue on
the host side (if it is a host-side issue).

(Guest and host owner need to work together for debugging, of course).

Regards,

--
Jörg Rödel
jroedel@suse.de

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