From patchwork Wed Jul 20 13:12:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cindy Lu X-Patchwork-Id: 12923977 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id F3CEBC433EF for ; Wed, 20 Jul 2022 13:27:43 +0000 (UTC) Received: from localhost ([::1]:34168 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oE9jr-0003Bt-4G for qemu-devel@archiver.kernel.org; Wed, 20 Jul 2022 09:27:43 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60996) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oE9VT-0006Ye-TC for qemu-devel@nongnu.org; Wed, 20 Jul 2022 09:12:51 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:31138) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oE9VR-0006tk-9e for qemu-devel@nongnu.org; Wed, 20 Jul 2022 09:12:51 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1658322768; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=nXZSH4llBhYszCPXN3mWokGoalQ4xjKJs9hNtX154SA=; b=fZ4weLVTxBHOg13uu00EwsOHOYNgJ9/f6gUnMnWLG2oPnAERWoZCSyQW52g+wiiD2Nk/Ei jxZhf9RKXb9VvEgG3A9eGzm/cobsRkBYxhQT84QASS0lFDGmfZFRUa++BtnehRkKCS3eyl jN7PsoXMo/f7iZO+H7xAo77sO2n3vHw= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-310-bxHuUAXTPqu2uy-OzpsBQg-1; Wed, 20 Jul 2022 09:12:39 -0400 X-MC-Unique: bxHuUAXTPqu2uy-OzpsBQg-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 602238041B5; Wed, 20 Jul 2022 13:12:39 +0000 (UTC) Received: from server.redhat.com (ovpn-13-124.pek2.redhat.com [10.72.13.124]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 84590C2811A; Wed, 20 Jul 2022 13:12:35 +0000 (UTC) From: Cindy Lu To: lulu@redhat.com, qemu-devel@nongnu.org Cc: Jason Wang , virtio-fs@redhat.com, Stefan Hajnoczi , "Dr. David Alan Gilbert" , "Michael S. Tsirkin" , "Gonglei (Arei)" , Gerd Hoffmann , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= Subject: [PATCH v13 06/10] virtio: add support for configure interrupt Date: Wed, 20 Jul 2022 21:12:00 +0800 Message-Id: <20220720131204.591104-7-lulu@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.8 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: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 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" Add the functions to support the configure interrupt in virtio The function virtio_config_guest_notifier_read will notify the guest if there is an configure interrupt. The function virtio_config_set_guest_notifier_fd_handler is to set the fd hander for the notifier Signed-off-by: Cindy Lu --- hw/virtio/virtio.c | 29 +++++++++++++++++++++++++++++ include/hw/virtio/virtio.h | 4 ++++ 2 files changed, 33 insertions(+) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 9d637e043e..ff1f72b9ff 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -3471,7 +3471,14 @@ static void virtio_queue_guest_notifier_read(EventNotifier *n) virtio_irq(vq); } } +static void virtio_config_guest_notifier_read(EventNotifier *n) +{ + VirtIODevice *vdev = container_of(n, VirtIODevice, config_notifier); + if (event_notifier_test_and_clear(n)) { + virtio_notify_config(vdev); + } +} void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign, bool with_irqfd) { @@ -3488,6 +3495,23 @@ void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign, } } +void virtio_config_set_guest_notifier_fd_handler(VirtIODevice *vdev, + bool assign, bool with_irqfd) +{ + EventNotifier *n; + n = &vdev->config_notifier; + if (assign && !with_irqfd) { + event_notifier_set_handler(n, virtio_config_guest_notifier_read); + } else { + event_notifier_set_handler(n, NULL); + } + if (!assign) { + /* Test and clear notifier before closing it,*/ + /* in case poll callback didn't have time to run. */ + virtio_config_guest_notifier_read(n); + } +} + EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq) { return &vq->guest_notifier; @@ -3555,6 +3579,11 @@ EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq) return &vq->host_notifier; } +EventNotifier *virtio_config_get_guest_notifier(VirtIODevice *vdev) +{ + return &vdev->config_notifier; +} + void virtio_queue_set_host_notifier_enabled(VirtQueue *vq, bool enabled) { vq->host_notifier_enabled = enabled; diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index 4512205503..d3087ed5e8 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -111,6 +111,7 @@ struct VirtIODevice bool use_guest_notifier_mask; AddressSpace *dma_as; QLIST_HEAD(, VirtQueue) *vector_queues; + EventNotifier config_notifier; }; struct VirtioDeviceClass { @@ -323,6 +324,9 @@ void virtio_queue_aio_attach_host_notifier(VirtQueue *vq, AioContext *ctx); void virtio_queue_aio_detach_host_notifier(VirtQueue *vq, AioContext *ctx); VirtQueue *virtio_vector_first_queue(VirtIODevice *vdev, uint16_t vector); VirtQueue *virtio_vector_next_queue(VirtQueue *vq); +EventNotifier *virtio_config_get_guest_notifier(VirtIODevice *vdev); +void virtio_config_set_guest_notifier_fd_handler(VirtIODevice *vdev, + bool assign, bool with_irqfd); static inline void virtio_add_feature(uint64_t *features, unsigned int fbit) {