From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: [PATCH 04/40] KVM: Introduce kvm_set_irq to inject interrupts in guests Date: Tue, 23 Sep 2008 16:46:18 +0300 Message-ID: <1222177614-26669-5-git-send-email-avi@redhat.com> References: <1222177614-26669-1-git-send-email-avi@redhat.com> Cc: kvm@vger.kernel.org, Amit Shah To: linux-kernel@vger.kernel.org Return-path: Received: from mx2.redhat.com ([66.187.237.31]:52344 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751940AbYIWNrF (ORCPT ); Tue, 23 Sep 2008 09:47:05 -0400 In-Reply-To: <1222177614-26669-1-git-send-email-avi@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: From: Amit Shah This function injects an interrupt into the guest given the kvm struct, the (guest) irq number and the interrupt level. Signed-off-by: Amit Shah Signed-off-by: Avi Kivity --- arch/x86/kvm/irq.c | 11 +++++++++++ arch/x86/kvm/irq.h | 2 ++ 2 files changed, 13 insertions(+), 0 deletions(-) diff --git a/arch/x86/kvm/irq.c b/arch/x86/kvm/irq.c index 76d736b..0d9e552 100644 --- a/arch/x86/kvm/irq.c +++ b/arch/x86/kvm/irq.c @@ -100,3 +100,14 @@ void __kvm_migrate_timers(struct kvm_vcpu *vcpu) __kvm_migrate_apic_timer(vcpu); __kvm_migrate_pit_timer(vcpu); } + +/* This should be called with the kvm->lock mutex held */ +void kvm_set_irq(struct kvm *kvm, int irq, int level) +{ + /* Not possible to detect if the guest uses the PIC or the + * IOAPIC. So set the bit in both. The guest will ignore + * writes to the unused one. + */ + kvm_ioapic_set_irq(kvm->arch.vioapic, irq, level); + kvm_pic_set_irq(pic_irqchip(kvm), irq, level); +} diff --git a/arch/x86/kvm/irq.h b/arch/x86/kvm/irq.h index 7ca47cb..07ff2ae 100644 --- a/arch/x86/kvm/irq.h +++ b/arch/x86/kvm/irq.h @@ -82,6 +82,8 @@ static inline int irqchip_in_kernel(struct kvm *kvm) void kvm_pic_reset(struct kvm_kpic_state *s); +void kvm_set_irq(struct kvm *kvm, int irq, int level); + void kvm_timer_intr_post(struct kvm_vcpu *vcpu, int vec); void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu); void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu); -- 1.6.0.1