From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Zyngier Subject: [PATCH v4 12/26] KVM: arm/arm64: GICv4: Propagate affinity changes to the physical ITS Date: Fri, 6 Oct 2017 16:33:47 +0100 Message-ID: <20171006153401.5481-13-marc.zyngier@arm.com> References: <20171006153401.5481-1-marc.zyngier@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Andre Przywara To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Return-path: In-Reply-To: <20171006153401.5481-1-marc.zyngier@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu List-Id: kvm.vger.kernel.org When the guest issues an affinity change, we need to tell the physical ITS that we're now targetting a new vcpu. This is done by extracting the current mapping, updating the target, and reapplying the mapping. Signed-off-by: Marc Zyngier --- virt/kvm/arm/vgic/vgic-its.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c index c9b1c0967426..42ffb9084bb7 100644 --- a/virt/kvm/arm/vgic/vgic-its.c +++ b/virt/kvm/arm/vgic/vgic-its.c @@ -337,11 +337,25 @@ static int vgic_copy_lpi_list(struct kvm_vcpu *vcpu, u32 **intid_ptr) static int update_affinity(struct vgic_irq *irq, struct kvm_vcpu *vcpu) { + int ret = 0; + spin_lock(&irq->irq_lock); irq->target_vcpu = vcpu; spin_unlock(&irq->irq_lock); - return 0; + if (irq->hw) { + struct its_vlpi_map map; + + ret = its_get_vlpi(irq->host_irq, &map); + if (ret) + return ret; + + map.vpe = &vcpu->arch.vgic_cpu.vgic_v3.its_vpe; + + ret = its_map_vlpi(irq->host_irq, &map); + } + + return ret; } /* -- 2.14.1