From mboxrd@z Thu Jan 1 00:00:00 1970 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=-16.0 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,SPF_PASS 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 0DB0CC433DB for ; Wed, 13 Jan 2021 15:51:31 +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 9713E233F8 for ; Wed, 13 Jan 2021 15:51:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9713E233F8 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]:32986 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kziQj-0003H3-2W for qemu-devel@archiver.kernel.org; Wed, 13 Jan 2021 10:51:29 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:45888) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kziLU-0006Un-Tv for qemu-devel@nongnu.org; Wed, 13 Jan 2021 10:46:04 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:52702) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kziLT-00069X-1J for qemu-devel@nongnu.org; Wed, 13 Jan 2021 10:46:04 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1610552760; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ko5WBFXoVfjkU3bTSNRILLRsJH5HnXFXKxAL8O3vHL0=; b=fmHScRWiMOYGWH7Y6ia4W/pK4wVsZxUzj6cl9kZDfQtFlvpetanHKdWRcaewJYxGcYaZFI pC1gguy7CiBvhXz0iC96Q/sdCm9ntkWBb47Axj+F6Hznb9Zr9/e2u15aLUTWgAym/lAEVt nht3KhLXSN38Akxc7F8Q6ueC5fUn8jI= 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-495-FS_j2EIsNG-QB6amoIe8cQ-1; Wed, 13 Jan 2021 10:45:58 -0500 X-MC-Unique: FS_j2EIsNG-QB6amoIe8cQ-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 0CA3681470A for ; Wed, 13 Jan 2021 15:45:58 +0000 (UTC) Received: from laptop.redhat.com (ovpn-12-95.pek2.redhat.com [10.72.12.95]) by smtp.corp.redhat.com (Postfix) with ESMTP id 65CE277BE2; Wed, 13 Jan 2021 15:45:56 +0000 (UTC) From: Cindy Lu To: mst@redhat.com, jasowang@redhat.com, qemu-devel@nongnu.org Subject: [PATCH v1 2/4] virtio-pci:add support for configure interrupt Date: Wed, 13 Jan 2021 23:45:38 +0800 Message-Id: <20210113154540.24981-3-lulu@redhat.com> In-Reply-To: <20210113154540.24981-1-lulu@redhat.com> References: <20210113154540.24981-1-lulu@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 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 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Received-SPF: pass client-ip=216.205.24.124; envelope-from=lulu@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.25, 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_H3=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: , Cc: lulu@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Add support for configure interrupt, use kvm_irqfd_assign and set the gsi to kernel. When the configure notifier was eventfd_signal by host kernel, this will finally inject an msix interrupt to guest Signed-off-by: Cindy Lu --- hw/virtio/virtio-pci.c | 93 ++++++++++++++++++++++++++++++++++ include/hw/virtio/virtio-bus.h | 2 + 2 files changed, 95 insertions(+) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index 36524a5728..f8053e1fab 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -762,6 +762,98 @@ undo: return ret; } + static int kvm_virtio_pci_config_irqfd_use(VirtIOPCIProxy *proxy, + unsigned int vector) +{ + VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; + VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); + EventNotifier *n = virtio_queue_get_config_notifier(vdev); + assert(irqfd); + return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, n, NULL, irqfd->virq); +} + +static void kvm_virtio_pci_config_irqfd_release(VirtIOPCIProxy *proxy, + unsigned int vector) +{ + VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); + EventNotifier *n = virtio_queue_get_config_notifier(vdev); + VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; + assert(irqfd); + kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, n, irqfd->virq); + return; +} +static int kvm_virtio_pci_config_vector_use(VirtIOPCIProxy *proxy, + unsigned int vector) +{ + VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; + int ret; + + if (irqfd->users == 0) { + ret = kvm_irqchip_add_msi_route(kvm_state, vector, &proxy->pci_dev); + if (ret < 0) { + return ret; + } + irqfd->virq = ret; + } + irqfd->users++; + + return 0; +} +static int kvm_virtio_pci_vector_config_use(VirtIOPCIProxy *proxy) +{ + + VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); + unsigned int vector; + int ret; + VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); + + vector = vdev->config_vector ; + ret = kvm_virtio_pci_config_vector_use(proxy, vector); + if (ret < 0) { + goto undo; + } + ret = kvm_virtio_pci_config_irqfd_use(proxy, vector); + if (ret < 0) { + goto undo; + } + return 0; +undo: + kvm_virtio_pci_config_irqfd_release(proxy, vector); + return ret; +} +static void kvm_virtio_pci_vector_config_release(VirtIOPCIProxy *proxy) +{ + PCIDevice *dev = &proxy->pci_dev; + VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); + unsigned int vector; + VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); + vector = vdev->config_vector ; + if (vector >= msix_nr_vectors_allocated(dev)) { + return; + } + kvm_virtio_pci_config_irqfd_release(proxy, vector); + kvm_virtio_pci_vq_vector_release(proxy, vector); +} + +static int virtio_pci_set_guest_config_notifier(DeviceState *d, bool assign, + bool with_irqfd) +{ + VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); + VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); + EventNotifier *notifier = virtio_queue_get_config_notifier(vdev); + int r = 0; + if (assign) { + r = event_notifier_init(notifier, 1); + virtio_set_config_notifier_fd_handler(vdev, true, with_irqfd); + kvm_virtio_pci_vector_config_use(proxy); + } else { + virtio_set_config_notifier_fd_handler(vdev, false, with_irqfd); + kvm_virtio_pci_vector_config_release(proxy); + event_notifier_cleanup(notifier); + } + return r; +} + static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs) { PCIDevice *dev = &proxy->pci_dev; @@ -2137,6 +2229,7 @@ static void virtio_pci_bus_class_init(ObjectClass *klass, void *data) k->ioeventfd_assign = virtio_pci_ioeventfd_assign; k->get_dma_as = virtio_pci_get_dma_as; k->queue_enabled = virtio_pci_queue_enabled; + k->set_config_notifiers = virtio_pci_set_guest_config_notifier; } static const TypeInfo virtio_pci_bus_info = { diff --git a/include/hw/virtio/virtio-bus.h b/include/hw/virtio/virtio-bus.h index ef8abe49c5..dae81ee414 100644 --- a/include/hw/virtio/virtio-bus.h +++ b/include/hw/virtio/virtio-bus.h @@ -93,6 +93,8 @@ struct VirtioBusClass { */ bool has_variable_vring_alignment; AddressSpace *(*get_dma_as)(DeviceState *d); + int (*set_config_notifiers)(DeviceState *d, bool assign, bool with_irqfd); + }; struct VirtioBusState { -- 2.21.3