Re: Fwd: Windows 11 guest crashing supposedly in smm after some time of use

[Sean Christopherson <seanjc@google.com>]

On Thu, Feb 16, 2023, Michał Zegan wrote:
> Resending to kvm mailing list, in case someone here might help... Also will
> try again with newer ovmf, but assume it happens.
> I have windows11 installed on a vm. This vm generally works properly, but
> then might crash unexpectedly at any point, this includes situation like
> logging onto the system and leaving it intact for like an hour or less. This
> can be reproduced by waiting long enough but there is no single known action
> causing it.
> 
> What could be the problem?
> 
> 
> Configuration and error details:
> 
> My host is a msi vector gp76 laptop with intel core i7 12700h, 32gb of
> memory, host os is fedora linux 37 with custom compiled linux kernel (fedora
> patches). Current kernel version is 6.1.10 but when I installed the vm it
> was 6.0 or less, don't quite remember exactly, and this bug was present. Not
> sure if bios is up to date, but microcode is, if that matters.

...

> Guest is windows 11 pro 64 bit.
> 
> What crashes is qemu itself, not that the guest is bsod'ing.

Can you try a 6.2 or later kernel?  E.g. Linus' HEAD, linux-next, kvm/queue, etc.
KVM had a pile of SMM fixes[*] merged for 6.2 specifically aimed at fixing issues
with secure boot of Windows 11 guest.  They aren't likely to be backported to LTS
kernels as they aren't easily consumable (though I'm guessing software vendors
will end up backporting to their supported kernels).

[*] https://lore.kernel.org/all/20221025124741.228045-1-mlevitsk@redhat.com