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From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: rkrcmar@redhat.com, rkagan@virtuozzo.com, dplotnikov@virtuozzo.com
Subject: [PATCH 5/6] KVM: lapic: do not set KVM_REQ_EVENT unnecessarily on PPR update
Date: Mon, 19 Dec 2016 10:47:17 +0100	[thread overview]
Message-ID: <1482140838-6303-6-git-send-email-pbonzini@redhat.com> (raw)
In-Reply-To: <1482140838-6303-1-git-send-email-pbonzini@redhat.com>

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

  parent reply	other threads:[~2016-12-19  9:48 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-12-19  9:47 [RFC PATCH v3 0/6] KVM: x86: avoid redundant REQ_EVENT Paolo Bonzini
2016-12-19  9:47 ` [PATCH 1/6] KVM: x86: add VCPU stat for KVM_REQ_EVENT processing Paolo Bonzini
2016-12-20  9:21   ` Roman Kagan
2016-12-20  9:32     ` Paolo Bonzini
2016-12-19  9:47 ` [PATCH 2/6] KVM: lapic: do not set KVM_REQ_EVENT unnecessarily on EOI Paolo Bonzini
2016-12-23 12:08   ` Paolo Bonzini
2016-12-19  9:47 ` [PATCH 3/6] KVM: vmx: speed up TPR below threshold vmexits Paolo Bonzini
2016-12-19  9:47 ` [PATCH 4/6] KVM: lapic: avoid unnecessary KVM_REQ_EVENT on IRR scan Paolo Bonzini
2016-12-19  9:47 ` Paolo Bonzini [this message]
2016-12-19  9:47 ` [PATCH 6/6] KVM: lapic: do not scan IRR when delivering an interrupt Paolo Bonzini
2016-12-20 17:11   ` Paolo Bonzini
2016-12-19 13:05 ` [RFC PATCH v3 0/6] KVM: x86: avoid redundant REQ_EVENT Denis Plotnikov
2016-12-19 14:30   ` Paolo Bonzini
2016-12-20 10:01     ` Roman Kagan

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