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authorJan H. Schönherr <jschoenh@amazon.de>2017-09-06 18:34:06 +0200
committerRadim Krčmář <rkrcmar@redhat.com>2017-09-13 16:40:24 +0200
commit2f173d2688559a6f85643d38a2ad6f45eb420c42 (patch)
treed01b370f149fcd13d0f8d75ed226cf5b32f7ed31 /arch
parenta05950009f50ca971a1d616655d01628177bd2e3 (diff)
KVM: x86: Fix immediate_exit handling for uninitialized AP
When user space sets kvm_run->immediate_exit, KVM is supposed to return quickly. However, when a vCPU is in KVM_MP_STATE_UNINITIALIZED, the value is not considered and the vCPU blocks. Fix that oversight. Fixes: 460df4c1fc7c008 ("KVM: race-free exit from KVM_RUN without POSIX signals") Signed-off-by: Jan H. Schönherr <jschoenh@amazon.de> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/x86.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b27f7f0020e3..c777a8f681a8 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7231,6 +7231,10 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
+ if (kvm_run->immediate_exit) {
+ r = -EINTR;
+ goto out;
+ }
kvm_vcpu_block(vcpu);
kvm_apic_accept_events(vcpu);
kvm_clear_request(KVM_REQ_UNHALT, vcpu);