Re: [PATCH 1/2] KVM: x86/pmu: Reset perf_capabilities in vcpu to 0 if PDCM is disabled

From: Paolo Bonzini
Date: Mon Jan 29 2024 - 09:40:54 EST


On 1/26/24 20:30, Mingwei Zhang wrote:
Hrm, I don't hate it as a stopgap. But if we are the only people that are affected,
because again I'm pretty sure QEMU is fine, I would rather we just fix things in
our VMM and/or internal kernel.
It is not just QEMU. crossvm is another open source VMM that suffers
from this one.

Can you explain the symptoms in both Google's internal VMM and crosvm?

Thanks,

Paolo