From patchwork Wed Jun 28 15:04:07 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 9814705 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 5E61760383 for ; Wed, 28 Jun 2017 15:25:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4F46728575 for ; Wed, 28 Jun 2017 15:25:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 43A0E285B3; Wed, 28 Jun 2017 15:25:46 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id E3A50285E2 for ; Wed, 28 Jun 2017 15:25:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=36OTwNouSWkglnXI8Hx6nlRitlhlCblhAqhf4bASDL4=; b=jwGAUUciRPzqDZTO1v6pCLnpkC Wjr2M9kTS4wbgX9OAyyY78xStHE4HS8Us+bBdb5gq7LQNgJXOPBI2VTOXz4zt7O/i1KPm8yZsu3XV UutF84sq7L1NZyLHXGn9kxoQv2P3h07yLeWPyQ9BvRfN//05AkoU1x5EQk5//rbyAyoqWv5e8Wf7O iJv610zixAULfVxm3vx8iKvWiRuacQINJpeSwxqJ86pOssUtt6ydQQKnWuywVl0ylbb56Tg6mraS+ LPr54Qpi5rj0FHhbyh2ThJ2iuwajYbEjWN1GJRR/XIJlGAbcUbxDrh7EtYpLLnGbSmSe0vOjPCkH+ nfQiKjzQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dQEqe-0006hF-IB; Wed, 28 Jun 2017 15:25:44 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dQEXX-0001Kn-5t for linux-arm-kernel@lists.infradead.org; Wed, 28 Jun 2017 15:06:06 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 256741688; Wed, 28 Jun 2017 08:05:59 -0700 (PDT) Received: from approximate.cambridge.arm.com (approximate.cambridge.arm.com [10.1.207.16]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B1A753F4FF; Wed, 28 Jun 2017 08:05:57 -0700 (PDT) From: Marc Zyngier To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu Subject: [PATCH v2 48/52] KVM: arm/arm64: GICv4: Add doorbell interrupt handling Date: Wed, 28 Jun 2017 16:04:07 +0100 Message-Id: <20170628150411.15846-49-marc.zyngier@arm.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170628150411.15846-1-marc.zyngier@arm.com> References: <20170628150411.15846-1-marc.zyngier@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170628_080559_919286_8993207D X-CRM114-Status: GOOD ( 10.35 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Jason Cooper , Eric Auger , Christoffer Dall , Thomas Gleixner , Shanker Donthineni MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP When a vPE is not running, the delivery of a VLPI results in a doorbell interrupt to be delivered. Let's handle this interrupt and update the pending_last flag that indicates that VLPIs are pending. Signed-off-by: Marc Zyngier --- virt/kvm/arm/vgic/vgic-v4.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/virt/kvm/arm/vgic/vgic-v4.c b/virt/kvm/arm/vgic/vgic-v4.c index a2d1a6db0490..fe0d0a8ed469 100644 --- a/virt/kvm/arm/vgic/vgic-v4.c +++ b/virt/kvm/arm/vgic/vgic-v4.c @@ -21,6 +21,14 @@ #include "vgic.h" +static irqreturn_t vgic_v4_doorbell_handler(int irq, void *info) +{ + struct kvm_vcpu *vcpu = info; + + vcpu->arch.vgic_cpu.vgic_v3.its_vpe.pending_last = true; + return IRQ_HANDLED; +} + int vgic_v4_init(struct kvm *kvm) { struct vgic_dist *dist = &kvm->arch.vgic; @@ -47,12 +55,34 @@ int vgic_v4_init(struct kvm *kvm) return ret; } + kvm_for_each_vcpu(i, vcpu, kvm) { + int irq = dist->its_vm.vpes[i]->irq; + + ret = request_irq(irq, vgic_v4_doorbell_handler, + 0, "vcpu", vcpu); + if (ret) { + kvm_err("failed to allocate vcpu IRQ%d\n", irq); + dist->its_vm.nr_vpes = i; + break; + } + } + + if (ret) + vgic_v4_teardown(kvm); + return ret; } void vgic_v4_teardown(struct kvm *kvm) { struct its_vm *its_vm = &kvm->arch.vgic.its_vm; + struct kvm_vcpu *vcpu; + int i; + + for (i = 0; i < its_vm->nr_vpes; i++) { + vcpu = kvm_get_vcpu(kvm, i); + free_irq(its_vm->vpes[i]->irq, vcpu); + } its_free_vcpu_irqs(its_vm); kfree(its_vm->vpes);