[PATCH 5/6] KVM: lapic: do not set KVM_REQ_EVENT unnecessarily on PPR update

From	Paolo Bonzini <pbonzini@redhat.com>
Newsgroups	linux.kernel
Subject	[PATCH 5/6] KVM: lapic: do not set KVM_REQ_EVENT unnecessarily on PPR update
Date	2016-12-19 10:50 +0100
Message-ID	<sQ2JY-60r-29@gated-at.bofh.it> (permalink)
References	<sQ2JY-60r-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On PPR update, we set KVM_REQ_EVENT unconditionally anytime PPR is lowered.
But we can take into account IRR here already.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kvm/lapic.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index f936644d8011..dc4ea8bdea9c 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -607,7 +607,8 @@ static void apic_update_ppr(struct kvm_lapic *apic)
 {
 	u32 ppr;
 
-	if (__apic_update_ppr(apic, &ppr))
+	if (__apic_update_ppr(apic, &ppr) &&
+	    apic_has_interrupt_for_ppr(apic, ppr) != -1)
 		kvm_make_request(KVM_REQ_EVENT, apic->vcpu);
 }
 
-- 
1.8.3.1

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[PATCH 5/6] KVM: lapic: do not set KVM_REQ_EVENT unnecessarily on PPR update Paolo Bonzini <pbonzini@redhat.com> - 2016-12-19 10:50 +0100

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