On 2023-10-19 01:11 PM, Sean Christopherson wrote: > [ Upstream commit 0df9dab891ff0d9b646d82e4fe038229e4c02451 ] > > Stop zapping invalidate TDP MMU roots via work queue now that KVM > preserves TDP MMU roots until they are explicitly invalidated. Zapping > roots asynchronously was effectively a workaround to avoid stalling a vCPU > for an extended during if a vCPU unloaded a root, which at the time > happened whenever the guest toggled CR0.WP (a frequent operation for some > guest kernels). > [...] > > Reported-by: Pattara Teerapong <pteerapong@xxxxxxxxxx> > Cc: David Stevens <stevensd@xxxxxxxxxx> > Cc: Yiwei Zhang<zzyiwei@xxxxxxxxxx> > Cc: Paul Hsia <paulhsia@xxxxxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx > Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx> > Message-Id: <20230916003916.2545000-4-seanjc@xxxxxxxxxx> > Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> > Cc: David Matlack <dmatlack@xxxxxxxxxx> > Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx> > --- Reviewed-by: David Matlack <dmatlack@xxxxxxxxxx> Tested-by: David Matlack <dmatlack@xxxxxxxxxx> (Ran all KVM selftests and kvm-unit-tests with lockdep enabled.)
