lkml.org 
[lkml]   [2016]   [Dec]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/6] KVM: lapic: do not set KVM_REQ_EVENT unnecessarily on EOI
Date
On EOI, there is no need to set KVM_REQ_EVENT unconditionally.  The PPR
update is already setting it if resetting the ISR bit causes PPR to
decrease. Even a level-triggered IOAPIC interrupt will set KVM_REQ_EVENT
on a reinjection (ioapic_service -> kvm_irq_delivery_to_apic and from
there to __apic_accept_irq).

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

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index e35cbd44c505..70c7428b7a57 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1066,7 +1066,6 @@ static int apic_set_eoi(struct kvm_lapic *apic)
kvm_hv_synic_send_eoi(apic->vcpu, vector);

kvm_ioapic_send_eoi(apic, vector);
- kvm_make_request(KVM_REQ_EVENT, apic->vcpu);
return vector;
}

@@ -1081,7 +1080,6 @@ void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector)
trace_kvm_eoi(apic, vector);

kvm_ioapic_send_eoi(apic, vector);
- kvm_make_request(KVM_REQ_EVENT, apic->vcpu);
}
EXPORT_SYMBOL_GPL(kvm_apic_set_eoi_accelerated);

--
1.8.3.1

\
 
 \ /
  Last update: 2016-12-19 10:53    [W:0.376 / U:0.080 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site