From patchwork Wed Mar 27 01:22:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cindy Lu X-Patchwork-Id: 13605386 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 E9836CD11DF for ; Wed, 27 Mar 2024 01:31:35 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rpI8J-0005g8-9v; Tue, 26 Mar 2024 21:31:15 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rpI8G-0005fs-Uw for qemu-devel@nongnu.org; Tue, 26 Mar 2024 21:31:13 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rpI8C-00040K-6y for qemu-devel@nongnu.org; Tue, 26 Mar 2024 21:31:12 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1711503062; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=4fk/8WpCis16alrDsadAD/keSsbupEqlLK6z5jeJxpA=; b=AVNFBqv6SLtRyX7B2xD3wJB64FvVAl4dMZJ0+Gi2U4udOK1IH5wEWlMPkvOsooB6pz8+Et 6XT+nfLPKHZ+XyZ4cTaToI950A7mTlXatlv5WcrKu27wlg1FF6soIqeLKIdnR2rOJc/072 QYaB2WngsXAzHUMPDW0KQntic57Ll3E= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-583-Lt5MTGmONUCf6v89PZXknA-1; Tue, 26 Mar 2024 21:29:25 -0400 X-MC-Unique: Lt5MTGmONUCf6v89PZXknA-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id DAA7588B7A1 for ; Wed, 27 Mar 2024 01:29:24 +0000 (UTC) Received: from server.redhat.com (unknown [10.72.112.204]) by smtp.corp.redhat.com (Postfix) with ESMTP id C61B2492BD0; Wed, 27 Mar 2024 01:29:22 +0000 (UTC) From: Cindy Lu To: lulu@redhat.com, mst@redhat.com, jasowang@redhat.com, qemu-devel@nongnu.org Subject: [RFC 2/2] virtio-pci: check if the configure interrupt enable Date: Wed, 27 Mar 2024 09:22:15 +0800 Message-ID: <20240327012905.70188-3-lulu@redhat.com> In-Reply-To: <20240327012905.70188-1-lulu@redhat.com> References: <20240327012905.70188-1-lulu@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.10 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=-0.088, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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: 2.1.29 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-bounces+qemu-devel=archiver.kernel.org@nongnu.org If config_irq_enabled is not true, it means that configure interrupt is not supported. Therefore, the config vector will not be handled during the interrupt process. Signed-off-by: Cindy Lu --- hw/virtio/virtio-pci.c | 41 +++++++++++++++++++++++------------------ 1 file changed, 23 insertions(+), 18 deletions(-) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index e433879542..36ad7da206 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1065,7 +1065,7 @@ static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector, vq = virtio_vector_next_queue(vq); } /* unmask config intr */ - if (vector == vdev->config_vector) { + if ((vector == vdev->config_vector) && (true == vdev->config_irq_enabled)) { n = virtio_config_get_guest_notifier(vdev); ret = virtio_pci_one_vector_unmask(proxy, VIRTIO_CONFIG_IRQ_IDX, vector, msg, n); @@ -1111,7 +1111,7 @@ static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector) vq = virtio_vector_next_queue(vq); } - if (vector == vdev->config_vector) { + if ((vector == vdev->config_vector) && (true == vdev->config_irq_enabled)) { n = virtio_config_get_guest_notifier(vdev); virtio_pci_one_vector_mask(proxy, VIRTIO_CONFIG_IRQ_IDX, vector, n); } @@ -1147,21 +1147,24 @@ static void virtio_pci_vector_poll(PCIDevice *dev, } } /* poll the config intr */ - ret = virtio_pci_get_notifier(proxy, VIRTIO_CONFIG_IRQ_IDX, ¬ifier, - &vector); - if (ret < 0) { - return; - } - if (vector < vector_start || vector >= vector_end || - !msix_is_masked(dev, vector)) { - return; - } - if (k->guest_notifier_pending) { - if (k->guest_notifier_pending(vdev, VIRTIO_CONFIG_IRQ_IDX)) { + if (true == vdev->config_irq_enabled) { + ret = virtio_pci_get_notifier(proxy, VIRTIO_CONFIG_IRQ_IDX, ¬ifier, + &vector); + if (ret < 0) { + return; + } + + if (vector < vector_start || vector >= vector_end || + !msix_is_masked(dev, vector)) { + return; + } + if (k->guest_notifier_pending) { + if (k->guest_notifier_pending(vdev, VIRTIO_CONFIG_IRQ_IDX)) { + msix_set_pending(dev, vector); + } + } else if (event_notifier_test_and_clear(notifier)) { msix_set_pending(dev, vector); } - } else if (event_notifier_test_and_clear(notifier)) { - msix_set_pending(dev, vector); } } @@ -1282,9 +1285,11 @@ static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign) if (r < 0) { goto config_assign_error; } - r = kvm_virtio_pci_vector_config_use(proxy); - if (r < 0) { - goto config_error; + if (true == vdev->config_irq_enabled) { + r = kvm_virtio_pci_vector_config_use(proxy); + if (r < 0) { + goto config_error; + } } }