Commit a0595000 authored Sep 06, 2017 by Jan H. Schönherr Committed by Radim Krčmář Sep 13, 2017

KVM: x86: Fix handling of pending signal on uninitialized AP



KVM API says that KVM_RUN will return with -EINTR when a signal is
pending. However, if a vCPU is in KVM_MP_STATE_UNINITIALIZED, then
the return value is unconditionally -EAGAIN.

Copy over some code from vcpu_run(), so that the case of a pending
signal results in the expected return value.

Signed-off-by: Jan H. Schönherr <jschoenh@amazon.de>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>

parent 49a8afca

arch/x86/kvm/x86.c

+5 −0

Original line number	Original line	Diff line number	Diff line
	@@ -7235,6 +7235,11 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run kvm_run)
	kvm_apic_accept_events(vcpu);		kvm_apic_accept_events(vcpu);
	kvm_clear_request(KVM_REQ_UNHALT, vcpu);		kvm_clear_request(KVM_REQ_UNHALT, vcpu);
	r = -EAGAIN;		r = -EAGAIN;
			if (signal_pending(current)) {
			r = -EINTR;
			vcpu->run->exit_reason = KVM_EXIT_INTR;
			++vcpu->stat.signal_exits;
			}
	goto out;		goto out;
	}		}