From patchwork Sat Dec 17 10:43:18 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Wei W" X-Patchwork-Id: 9478945 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 642F160237 for ; Sat, 17 Dec 2016 10:55:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 64A3628587 for ; Sat, 17 Dec 2016 10:55:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 598482858A; Sat, 17 Dec 2016 10:55:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id DA4E928587 for ; Sat, 17 Dec 2016 10:55:51 +0000 (UTC) Received: from localhost ([::1]:36016 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cICec-0001Wh-Rv for patchwork-qemu-devel@patchwork.kernel.org; Sat, 17 Dec 2016 05:55:50 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53192) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cICUL-0007MS-8O for qemu-devel@nongnu.org; Sat, 17 Dec 2016 05:45:14 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cICUJ-00084z-SS for qemu-devel@nongnu.org; Sat, 17 Dec 2016 05:45:13 -0500 Received: from mga05.intel.com ([192.55.52.43]:21540) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cICUJ-0007ss-L1 for qemu-devel@nongnu.org; Sat, 17 Dec 2016 05:45:11 -0500 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga105.fm.intel.com with ESMTP; 17 Dec 2016 02:45:11 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos; i="5.33,363,1477983600"; d="scan'208"; a="1073174441" Received: from devel-ww.sh.intel.com ([10.239.48.105]) by orsmga001.jf.intel.com with ESMTP; 17 Dec 2016 02:45:09 -0800 From: Wei Wang To: marcandre.lureau@gmail.com, mst@redhat.com, stefanha@redhat.com, pbonzini@redhat.com, qemu-devel@nongnu.org, virtio-dev@lists.oasis-open.org Date: Sat, 17 Dec 2016 18:43:18 +0800 Message-Id: <1481971427-11094-9-git-send-email-wei.w.wang@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1481971427-11094-1-git-send-email-wei.w.wang@intel.com> References: <1481971427-11094-1-git-send-email-wei.w.wang@intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.43 Subject: [Qemu-devel] [PATCH v1 08/37] vhost-pci-slave/msg: VHOST_USER_SET_FEATURES X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Wei Wang Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Store the feature bits that have been negotiated between the master device and driver. The feature bits will be negotiated with the slave driver. Signed-off-by: Wei Wang --- hw/virtio/vhost-pci-slave.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/hw/virtio/vhost-pci-slave.c b/hw/virtio/vhost-pci-slave.c index 4f445c2..bc6120c 100644 --- a/hw/virtio/vhost-pci-slave.c +++ b/hw/virtio/vhost-pci-slave.c @@ -50,6 +50,13 @@ static int vp_slave_get_features(CharBackend *chr_be, VhostUserMsg *msg) return vp_slave_write(chr_be, msg); } +static void vp_slave_set_features(VhostUserMsg *msg) +{ + /* Clear the protocol feature bit, which is useless for the device */ + vp_slave->feature_bits = msg->payload.u64 + & ~(1 << VHOST_USER_F_PROTOCOL_FEATURES); +} + static void vp_slave_event(void *opaque, int event) { switch (event) { @@ -98,6 +105,9 @@ static void vp_slave_read(void *opaque, const uint8_t *buf, int size) if (ret < 0) goto err_handling; break; + case VHOST_USER_SET_FEATURES: + vp_slave_set_features(&msg); + break; default: error_report("vhost-pci-slave does not support msg request = %d", msg.request);