From nobody Tue Feb 10 11:23:55 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1666282509; cv=none; d=zohomail.com; s=zohoarc; b=C8Ct6qX/2ZDfBmHPyZjFk88iJBEl3GHpgZ4h7FBloPETMOqqXhn1EplaWPA4i4V5FRuRE6mah8BJILNUqoV0XLWBs2An/phSL/n3InETH1IFq0mXm+SX++Tf0t3UXnazsL2UzDtdj1xQ7dBl7LZactwrjMXLW6fxoBk785foIz0= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1666282509; h=Content-Transfer-Encoding:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=dGocB+Z5nzElvrsC44eFYZM5MVV65Kc+l8J2eFqgjuM=; b=BeWgP/jSn99ZpKmIzdXJxQtc5iJS3wvy9HqF1LLUrsOk0Y/9NFoEVy4mudkZBXb6tG9N1BVydZSubOfqz6WryF+PqTeGJ6W1uDr1spYAVZtbSImvOuj1reKaxiTiPr5JKDViEXtzO3zivcv5tLO5c2xNtXTXyABH4/xIG4Fr9r0= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1666282509492870.314453405792; Thu, 20 Oct 2022 09:15:09 -0700 (PDT) Received: from localhost ([::1]:42342 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1olYCJ-0007vr-Uf for importer@patchew.org; Thu, 20 Oct 2022 12:15:08 -0400 Received: from [::1] (helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1olY7X-0007uW-PR for importer@patchew.org; Thu, 20 Oct 2022 12:10:13 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60254) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1olWWQ-0000Es-Up for qemu-devel@nongnu.org; Thu, 20 Oct 2022 10:27:47 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:40872) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1olWWO-0001uO-Ar for qemu-devel@nongnu.org; Thu, 20 Oct 2022 10:27:46 -0400 Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-448-9ShQzll7Mwq2OuRwtfrj-g-1; Thu, 20 Oct 2022 10:27:42 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 6318529324B9; Thu, 20 Oct 2022 14:27:42 +0000 (UTC) Received: from server.redhat.com (ovpn-13-102.pek2.redhat.com [10.72.13.102]) by smtp.corp.redhat.com (Postfix) with ESMTP id 965C17AE5; Thu, 20 Oct 2022 14:27:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1666276063; 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=dGocB+Z5nzElvrsC44eFYZM5MVV65Kc+l8J2eFqgjuM=; b=PoELyZa08islh+eBfJ0wRmrbE7D8oRo58jRjIS4mCsFHqrPpASnLv5mJWdoZnv4A7b/6qt OGAdkULCmowJD8EHIffYRts4TmkmMIP+qovoq6xp2tKFm9/eWA8GDJ96jgfmL8pSXIm9RC C5vzdQlcgqoDMEIcoIljDqhcmEECWHc= X-MC-Unique: 9ShQzll7Mwq2OuRwtfrj-g-1 From: Cindy Lu To: lulu@redhat.com, mst@redhat.com, jasowang@redhat.com, kraxel@redhat.com, dgilbert@redhat.com, stefanha@redhat.com, arei.gonglei@huawei.com, marcandre.lureau@redhat.com, qemu-devel@nongnu.org Subject: [PATCH v16 06/10] virtio: add support for configure interrupt Date: Thu, 20 Oct 2022 22:26:28 +0800 Message-Id: <20221020142632.672893-7-lulu@redhat.com> In-Reply-To: <20221020142632.672893-1-lulu@redhat.com> References: <20221020142632.672893-1-lulu@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; 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: -23 X-Spam_score: -2.4 X-Spam_bar: -- X-Spam_report: (-2.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.251, 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_H2=-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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1666282510932100001 Content-Type: text/plain; charset="utf-8" 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 808446b4c9..7b53800ac1 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -3975,7 +3975,14 @@ static void virtio_queue_guest_notifier_read(EventNo= tifier *n) virtio_irq(vq); } } +static void virtio_config_guest_notifier_read(EventNotifier *n) +{ + VirtIODevice *vdev =3D container_of(n, VirtIODevice, config_notifier); =20 + 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) { @@ -3992,6 +3999,23 @@ void virtio_queue_set_guest_notifier_fd_handler(Virt= Queue *vq, bool assign, } } =20 +void virtio_config_set_guest_notifier_fd_handler(VirtIODevice *vdev, + bool assign, bool with_ir= qfd) +{ + EventNotifier *n; + n =3D &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; @@ -4072,6 +4096,11 @@ EventNotifier *virtio_queue_get_host_notifier(VirtQu= eue *vq) return &vq->host_notifier; } =20 +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 =3D enabled; diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index a9953cf8b0..62f2161844 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -131,6 +131,7 @@ struct VirtIODevice AddressSpace *dma_as; QLIST_HEAD(, VirtQueue) *vector_queues; QTAILQ_ENTRY(VirtIODevice) next; + EventNotifier config_notifier; }; =20 struct VirtioDeviceClass { @@ -345,6 +346,9 @@ void virtio_queue_aio_attach_host_notifier_no_poll(Virt= Queue *vq, AioContext *ct 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_ir= qfd); =20 static inline void virtio_add_feature(uint64_t *features, unsigned int fbi= t) { --=20 2.34.3