]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
KVM: x86: do not set st->preempted when going back to user space
authorPaolo Bonzini <pbonzini@redhat.com>
Tue, 7 Jun 2022 14:07:11 +0000 (10:07 -0400)
committerPaolo Bonzini <pbonzini@redhat.com>
Wed, 8 Jun 2022 08:21:06 +0000 (04:21 -0400)
commit54aa83c90198e68eee8b0850c749bc70efb548da
treed7d4efd13d42a72a0e05252689037bc08e126037
parent11d39e8cc43e1c6737af19ca9372e590061b5ad2
KVM: x86: do not set st->preempted when going back to user space

Similar to the Xen path, only change the vCPU's reported state if the vCPU
was actually preempted.  The reason for KVM's behavior is that for example
optimistic spinning might not be a good idea if the guest is doing repeated
exits to userspace; however, it is confusing and unlikely to make a difference,
because well-tuned guests will hardly ever exit KVM_RUN in the first place.

Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/x86.c
arch/x86/kvm/xen.h