From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoffer Dall Subject: [RFC PATCH v2 12/19] KVM: arm/arm64: Set VCPU affinity for virt timer irq Date: Mon, 17 Jul 2017 16:27:11 +0200 Message-ID: <20170717142718.13853-13-cdall@linaro.org> References: <20170717142718.13853-1-cdall@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id DD5DF40CE9 for ; Mon, 17 Jul 2017 10:26:54 -0400 (EDT) Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DG-d3ANTt0w9 for ; Mon, 17 Jul 2017 10:26:54 -0400 (EDT) Received: from mail-wm0-f54.google.com (mail-wm0-f54.google.com [74.125.82.54]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 036F649C18 for ; Mon, 17 Jul 2017 10:26:50 -0400 (EDT) Received: by mail-wm0-f54.google.com with SMTP id b134so49979209wma.0 for ; Mon, 17 Jul 2017 07:27:37 -0700 (PDT) In-Reply-To: <20170717142718.13853-1-cdall@linaro.org> 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 To: kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Cc: Marc Zyngier , Christoffer Dall , kvm@vger.kernel.org List-Id: kvmarm@lists.cs.columbia.edu As we are about to take physical interrupts for the virtual timer on the host but want to leave those active while running the VM (and let the VM deactivate them), we need to set the vtimer PPI affinity accordingly. Signed-off-by: Christoffer Dall --- virt/kvm/arm/arch_timer.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c index 4254f88..4275f8f 100644 --- a/virt/kvm/arm/arch_timer.c +++ b/virt/kvm/arm/arch_timer.c @@ -650,11 +650,20 @@ int kvm_timer_hyp_init(void) return err; } + err = irq_set_vcpu_affinity(host_vtimer_irq, kvm_get_running_vcpus()); + if (err) { + kvm_err("kvm_arch_timer: error setting vcpu affinity\n"); + goto out_free_irq; + } + kvm_info("virtual timer IRQ%d\n", host_vtimer_irq); cpuhp_setup_state(CPUHP_AP_KVM_ARM_TIMER_STARTING, "kvm/arm/timer:starting", kvm_timer_starting_cpu, kvm_timer_dying_cpu); + return 0; +out_free_irq: + free_percpu_irq(host_vtimer_irq, kvm_get_running_vcpus()); return err; } -- 2.9.0