From patchwork Tue Jul 6 07:20:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cindy Lu X-Patchwork-Id: 12359951 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A6593C07E96 for ; Tue, 6 Jul 2021 07:24:40 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2ECE661956 for ; Tue, 6 Jul 2021 07:24:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2ECE661956 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:55530 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m0fRf-0006HX-C9 for qemu-devel@archiver.kernel.org; Tue, 06 Jul 2021 03:24:39 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:40178) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m0fO6-0007F0-VE for qemu-devel@nongnu.org; Tue, 06 Jul 2021 03:20:58 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:35141) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m0fO5-0004Az-2Z for qemu-devel@nongnu.org; Tue, 06 Jul 2021 03:20:58 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1625556056; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7nYgg4DsuLMUPXRxb1WtLSP8ebl8wKifegdSqR8fZmU=; b=FGx1FKcLtdHefKSel0twaJ6O62CDPjzHBDCOIJkotFFK0wg4hOqNkiKa6cyCZsyeD11yq5 THlNnzMbOCOMMcFlgtIqOAk4/bB5CW5iAVxt9JAArsP3F2tA3RYZ7WojJHIDo3w84admbL /3f9x2vODjufojIwTvJK2aKfGyPVobk= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-190-1tH-yPj_PQOHlA00lcoeGg-1; Tue, 06 Jul 2021 03:20:55 -0400 X-MC-Unique: 1tH-yPj_PQOHlA00lcoeGg-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A1E815700F for ; Tue, 6 Jul 2021 07:20:54 +0000 (UTC) Received: from laptop.redhat.com (ovpn-13-123.pek2.redhat.com [10.72.13.123]) by smtp.corp.redhat.com (Postfix) with ESMTP id F3AC15C22A; Tue, 6 Jul 2021 07:20:51 +0000 (UTC) From: Cindy Lu To: lulu@redhat.com, mst@redhat.com, jasowang@redhat.com, qemu-devel@nongnu.org Subject: [PATCH v8 7/9] virtio-pci: decouple notifier from interrupt process Date: Tue, 6 Jul 2021 15:20:28 +0800 Message-Id: <20210706072030.32365-8-lulu@redhat.com> In-Reply-To: <20210706072030.32365-1-lulu@redhat.com> References: <20210706072030.32365-1-lulu@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=lulu@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=170.10.133.124; envelope-from=lulu@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.442, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" use the virtio_pci_get_notifier function to get the notifer, the input of the function will is the idx, the output is notifier and vector Signed-off-by: Cindy Lu --- hw/virtio/virtio-pci.c | 45 ++++++++++++++++++++++++++++++++---------- 1 file changed, 35 insertions(+), 10 deletions(-) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index 2fe5b1f5aa..fe06847b62 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -710,6 +710,28 @@ static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy, ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, n, irqfd->virq); assert(ret == 0); } +static int virtio_pci_get_notifier(VirtIOPCIProxy *proxy, int queue_no, + EventNotifier **n, unsigned int *vector) +{ + PCIDevice *dev = &proxy->pci_dev; + VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); + VirtQueue *vq; + + if (queue_no == VIRTIO_CONFIG_IRQ_IDX) { + return -1; + } else { + if (!virtio_queue_get_num(vdev, queue_no)) { + return -1; + } + *vector = virtio_queue_vector(vdev, queue_no); + vq = virtio_get_queue(vdev, queue_no); + *n = virtio_queue_get_guest_notifier(vq); + } + if (*vector >= msix_nr_vectors_allocated(dev)) { + return -1; + } + return 0; +} static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs) { @@ -718,13 +740,15 @@ static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs) VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); unsigned int vector; int ret, queue_no; - VirtQueue *vq; EventNotifier *n; for (queue_no = 0; queue_no < nvqs; queue_no++) { if (!virtio_queue_get_num(vdev, queue_no)) { break; } - vector = virtio_queue_vector(vdev, queue_no); + ret = virtio_pci_get_notifier(proxy, queue_no, &n, &vector); + if (ret < 0) { + break; + } if (vector >= msix_nr_vectors_allocated(dev)) { continue; } @@ -736,8 +760,6 @@ static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs) * Otherwise, delay until unmasked in the frontend. */ if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { - vq = virtio_get_queue(vdev, queue_no); - n = virtio_queue_get_guest_notifier(vq); ret = kvm_virtio_pci_irqfd_use(proxy, n, vector); if (ret < 0) { kvm_virtio_pci_vq_vector_release(proxy, vector); @@ -754,8 +776,10 @@ undo: continue; } if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { - vq = virtio_get_queue(vdev, queue_no); - n = virtio_queue_get_guest_notifier(vq); + ret = virtio_pci_get_notifier(proxy, queue_no, &n, &vector); + if (ret < 0) { + break; + } kvm_virtio_pci_irqfd_release(proxy, n, vector); } kvm_virtio_pci_vq_vector_release(proxy, vector); @@ -770,13 +794,16 @@ static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs) unsigned int vector; int queue_no; VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); - VirtQueue *vq; EventNotifier *n; + int ret ; for (queue_no = 0; queue_no < nvqs; queue_no++) { if (!virtio_queue_get_num(vdev, queue_no)) { break; } - vector = virtio_queue_vector(vdev, queue_no); + ret = virtio_pci_get_notifier(proxy, queue_no, &n, &vector); + if (ret < 0) { + break; + } if (vector >= msix_nr_vectors_allocated(dev)) { continue; } @@ -784,8 +811,6 @@ static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs) * Otherwise, it was cleaned when masked in the frontend. */ if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) { - vq = virtio_get_queue(vdev, queue_no); - n = virtio_queue_get_guest_notifier(vq); kvm_virtio_pci_irqfd_release(proxy, n, vector); } kvm_virtio_pci_vq_vector_release(proxy, vector);