From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andre Przywara Subject: [RFC PATCH 11/45] KVM: arm/arm64: vgic-new: Implement kvm_vgic_vcpu_pending_irq Date: Fri, 25 Mar 2016 02:04:34 +0000 Message-ID: <1458871508-17279-12-git-send-email-andre.przywara@arm.com> References: <1458871508-17279-1-git-send-email-andre.przywara@arm.com> Cc: kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org To: Christoffer Dall , Marc Zyngier , Eric Auger Return-path: Received: from foss.arm.com ([217.140.101.70]:54652 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752051AbcCYCF3 (ORCPT ); Thu, 24 Mar 2016 22:05:29 -0400 In-Reply-To: <1458871508-17279-1-git-send-email-andre.przywara@arm.com> Sender: kvm-owner@vger.kernel.org List-ID: From: Eric Auger Tell KVM whether a particular VCPU has an IRQ that needs handling in the guest. This is used to decide whether a VCPU is runnable. Signed-off-by: Eric Auger Signed-off-by: Andre Przywara --- include/kvm/vgic/vgic.h | 2 ++ virt/kvm/arm/vgic/vgic.c | 22 ++++++++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/include/kvm/vgic/vgic.h b/include/kvm/vgic/vgic.h index 986f23f..2ce9b4a 100644 --- a/include/kvm/vgic/vgic.h +++ b/include/kvm/vgic/vgic.h @@ -181,6 +181,8 @@ struct vgic_cpu { int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int intid, bool level); +int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu); + #define irqchip_in_kernel(k) (!!((k)->arch.vgic.in_kernel)) #define vgic_initialized(k) (false) #define vgic_ready(k) ((k)->arch.vgic.ready) diff --git a/virt/kvm/arm/vgic/vgic.c b/virt/kvm/arm/vgic/vgic.c index 9eb031e8..d6c8c92 100644 --- a/virt/kvm/arm/vgic/vgic.c +++ b/virt/kvm/arm/vgic/vgic.c @@ -477,3 +477,25 @@ void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu) vgic_populate_lrs(vcpu); spin_unlock(&vcpu->arch.vgic_cpu.ap_list_lock); } + +int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu) +{ + struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu; + struct vgic_irq *irq; + bool pending = false; + + spin_lock(&vgic_cpu->ap_list_lock); + + list_for_each_entry(irq, &vgic_cpu->ap_list_head, ap_list) { + spin_lock(&irq->irq_lock); + pending = irq->pending && irq->enabled; + spin_unlock(&irq->irq_lock); + + if (pending) + break; + } + + spin_unlock(&vgic_cpu->ap_list_lock); + + return pending; +} -- 2.7.3 From mboxrd@z Thu Jan 1 00:00:00 1970 From: andre.przywara@arm.com (Andre Przywara) Date: Fri, 25 Mar 2016 02:04:34 +0000 Subject: [RFC PATCH 11/45] KVM: arm/arm64: vgic-new: Implement kvm_vgic_vcpu_pending_irq In-Reply-To: <1458871508-17279-1-git-send-email-andre.przywara@arm.com> References: <1458871508-17279-1-git-send-email-andre.przywara@arm.com> Message-ID: <1458871508-17279-12-git-send-email-andre.przywara@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Eric Auger Tell KVM whether a particular VCPU has an IRQ that needs handling in the guest. This is used to decide whether a VCPU is runnable. Signed-off-by: Eric Auger Signed-off-by: Andre Przywara --- include/kvm/vgic/vgic.h | 2 ++ virt/kvm/arm/vgic/vgic.c | 22 ++++++++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/include/kvm/vgic/vgic.h b/include/kvm/vgic/vgic.h index 986f23f..2ce9b4a 100644 --- a/include/kvm/vgic/vgic.h +++ b/include/kvm/vgic/vgic.h @@ -181,6 +181,8 @@ struct vgic_cpu { int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int intid, bool level); +int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu); + #define irqchip_in_kernel(k) (!!((k)->arch.vgic.in_kernel)) #define vgic_initialized(k) (false) #define vgic_ready(k) ((k)->arch.vgic.ready) diff --git a/virt/kvm/arm/vgic/vgic.c b/virt/kvm/arm/vgic/vgic.c index 9eb031e8..d6c8c92 100644 --- a/virt/kvm/arm/vgic/vgic.c +++ b/virt/kvm/arm/vgic/vgic.c @@ -477,3 +477,25 @@ void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu) vgic_populate_lrs(vcpu); spin_unlock(&vcpu->arch.vgic_cpu.ap_list_lock); } + +int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu) +{ + struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu; + struct vgic_irq *irq; + bool pending = false; + + spin_lock(&vgic_cpu->ap_list_lock); + + list_for_each_entry(irq, &vgic_cpu->ap_list_head, ap_list) { + spin_lock(&irq->irq_lock); + pending = irq->pending && irq->enabled; + spin_unlock(&irq->irq_lock); + + if (pending) + break; + } + + spin_unlock(&vgic_cpu->ap_list_lock); + + return pending; +} -- 2.7.3