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authorGleb Natapov <gleb@redhat.com>2012-05-03 10:36:39 +0200
committerAvi Kivity <avi@redhat.com>2012-05-06 13:56:54 +0200
commita4fa16353108431e7cfdfc3ecf683bac21b50755 (patch)
treea6d8b41f8873b8d7bfe30c33d08e71a11d19b173 /arch
parentMerge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/t... (diff)
downloadlinux-a4fa16353108431e7cfdfc3ecf683bac21b50755.tar.xz
linux-a4fa16353108431e7cfdfc3ecf683bac21b50755.zip
KVM: ensure async PF event wakes up vcpu from halt
If vcpu executes hlt instruction while async PF is waiting to be delivered vcpu can block and deliver async PF only after another even wakes it up. This happens because kvm_check_async_pf_completion() will remove completion event from vcpu->async_pf.done before entering kvm_vcpu_block() and this will make kvm_arch_vcpu_runnable() return false. The solution is to make vcpu runnable when processing completion. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/x86.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 91a5e989abcf..185a2b823a2d 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6581,6 +6581,7 @@ void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
kvm_inject_page_fault(vcpu, &fault);
}
vcpu->arch.apf.halted = false;
+ vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
}
bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu)