From nobody Tue Sep 9 21:30:23 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1CAF5C76196 for ; Thu, 23 Mar 2023 05:33:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231240AbjCWFdd (ORCPT ); Thu, 23 Mar 2023 01:33:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59126 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230428AbjCWFcz (ORCPT ); Thu, 23 Mar 2023 01:32:55 -0400 Received: from mail-pj1-x102f.google.com (mail-pj1-x102f.google.com [IPv6:2607:f8b0:4864:20::102f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8CBD43252C for ; Wed, 22 Mar 2023 22:31:39 -0700 (PDT) Received: by mail-pj1-x102f.google.com with SMTP id a16so16172495pjs.4 for ; Wed, 22 Mar 2023 22:31:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1679549498; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=MgyyzGdPYlLmRb+LUWqhPpBI8LjddO/ZyliZeTEMlT4=; b=R51Z7g8eJ5Fc1tp1TH+HFYbvpmoLVJ5oZcRDp7my9huauSYN/wOxi6RF7q1p1s/LGq oIQMTHofE0VcWFzMzZy5jAEg1fmofuXjG79p+0c4WbJyo3A9hlrurDSvx+TlsgOgU7RL nC/Uvxq7f9IoFYsm5pnJw1mSjtc7yZtQYftbbcDcAV3UZ+0Z0A+8vl3Eztx9yaywJUO/ QlCwGZezutqsBHkrLch0kUUl1x24GgMRfO+EFelgH8pJAQazBzdK/dkTZMf03juzVRVJ FamN5U2qDZQJf/IoRKFAwQ9wPpXDdid9G0pOwqrvkkKuBNpTv8bNJD+QTNCljiE+PovE mHcg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1679549498; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=MgyyzGdPYlLmRb+LUWqhPpBI8LjddO/ZyliZeTEMlT4=; b=I4iynMXjauq8uo47i2QtSAKfS/OuzHP2l46PjGrTxLYG2nZCTlKk7GfuHnbUmHhC58 Lzy3ho+O9UkUnEFSM1+oTkJk8Fi7/jsgkVEzoai6Iq3eYrt9+BzZrjPZruV0mmNXTIl8 pD+GOYib3YrYUUHiSFAJt2lW6oRLI/zhWi2hmfNaK0RtE6H4R/xHIujthHrfTqv78cqt 707PTurnQXezFiFxf314S+VzQ09EjWXkyuf2BoQGJN3xL1ECkaeRKVZBhKjSYLYjVkLr ZUxArAK0nZYoh9TNdBTCdqxZOwup1D2bkvf9d87AKK/BXa6PxzqBBJgBOj2hZUKpEHFd hPtQ== X-Gm-Message-State: AAQBX9ekgRZE5CXTvzAb8ECMjIvFoWvDsLbyJ2ZPMm0UYsV7KDIcwgTO AYGANbDo7sIZQnBNmu4soyBX X-Google-Smtp-Source: AKy350YH4px/fpfENAFTMoaGx+h1YxxTfp/WcYOoA1qdOpbddjBgxe6xmwp46FWXLt4f59PccvHRQQ== X-Received: by 2002:a17:90a:1608:b0:240:1e0b:a7b7 with SMTP id n8-20020a17090a160800b002401e0ba7b7mr1863560pja.39.1679549498150; Wed, 22 Mar 2023 22:31:38 -0700 (PDT) Received: from localhost ([139.177.225.255]) by smtp.gmail.com with ESMTPSA id d9-20020a17090a6a4900b0023c8a23005asm432283pjm.49.2023.03.22.22.31.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Mar 2023 22:31:37 -0700 (PDT) From: Xie Yongji To: mst@redhat.com, jasowang@redhat.com, tglx@linutronix.de, hch@lst.de Cc: virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 08/11] vdpa: Add eventfd for the vdpa callback Date: Thu, 23 Mar 2023 13:30:40 +0800 Message-Id: <20230323053043.35-9-xieyongji@bytedance.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230323053043.35-1-xieyongji@bytedance.com> References: <20230323053043.35-1-xieyongji@bytedance.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add eventfd for the vdpa callback so that user can signal it directly instead of triggering the callback. It will be used for vhost-vdpa case. Signed-off-by: Xie Yongji Acked-by: Jason Wang --- drivers/vhost/vdpa.c | 2 ++ drivers/virtio/virtio_vdpa.c | 1 + include/linux/vdpa.h | 6 ++++++ 3 files changed, 9 insertions(+) diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index 7be9d9d8f01c..9cd878e25cff 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -599,9 +599,11 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *= v, unsigned int cmd, if (vq->call_ctx.ctx) { cb.callback =3D vhost_vdpa_virtqueue_cb; cb.private =3D vq; + cb.trigger =3D vq->call_ctx.ctx; } else { cb.callback =3D NULL; cb.private =3D NULL; + cb.trigger =3D NULL; } ops->set_vq_cb(vdpa, idx, &cb); vhost_vdpa_setup_vq_irq(v, idx); diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c index f3826f42b704..2a095f37f26b 100644 --- a/drivers/virtio/virtio_vdpa.c +++ b/drivers/virtio/virtio_vdpa.c @@ -196,6 +196,7 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsign= ed int index, /* Setup virtqueue callback */ cb.callback =3D callback ? virtio_vdpa_virtqueue_cb : NULL; cb.private =3D info; + cb.trigger =3D NULL; ops->set_vq_cb(vdpa, index, &cb); ops->set_vq_num(vdpa, index, virtqueue_get_vring_size(vq)); =20 diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index e52c9a37999c..0372b2e3d38a 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -13,10 +13,16 @@ * struct vdpa_calllback - vDPA callback definition. * @callback: interrupt callback function * @private: the data passed to the callback function + * @trigger: the eventfd for the callback (Optional). + * When it is set, the vDPA driver must guarantee that + * signaling it is functional equivalent to triggering + * the callback. Then vDPA parent can signal it directly + * instead of triggering the callback. */ struct vdpa_callback { irqreturn_t (*callback)(void *data); void *private; + struct eventfd_ctx *trigger; }; =20 /** --=20 2.20.1