From: Matt Gingell <gingell@google.com>
Date: Mon, 16 Nov 2015 23:26:05 +0000 (-0800)
Subject: KVM: x86: set KVM_REQ_EVENT on local interrupt request from user space
X-Git-Tag: v4.4-rc3~23^2~4
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=934bf65354227981df15bbc755d33f4ba3443ff2;p=karo-tx-linux.git

KVM: x86: set KVM_REQ_EVENT on local interrupt request from user space

Set KVM_REQ_EVENT when a PIC in user space injects a local interrupt.

Currently a request is only made when neither the PIC nor the APIC is in
the kernel, which is not sufficient in the split IRQ chip case.

This addresses a problem in QEMU where interrupts are delayed until
another path invokes the event loop.

Reviewed-by: Steve Rutherford <srutherford@google.com>
Signed-off-by: Matt Gingell <gingell@google.com>
Fixes: 1c1a9ce973a7863dd46767226bce2a5f12d48bc6
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 32f6b760682c..f254e296d368 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2806,6 +2806,7 @@ static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
 		return -EEXIST;
 
 	vcpu->arch.pending_external_vector = irq->irq;
+	kvm_make_request(KVM_REQ_EVENT, vcpu);
 	return 0;
 }