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[109.64.31.13]) by smtp.gmail.com with ESMTPSA id m10sm5848176qki.74.2019.12.23.08.41.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Dec 2019 08:41:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1577119293; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=zj2wVrIh8KQNhFA65bESMfJP7roYgy+mFo3n5QglPhQ=; b=HSYDfcnQC1rZrfLybnIh+F7sEZoO5BTJ6cWKZFsEifZ/16PqQOB4MYbFbscw8uH4Lyr8ae nV6nmbTTXjWVO3+weUvzd3tya4KlFaP2xuhY2MSY5kZytijDgdFTGD430h0uCXyc4BKlqS VuBf3A79ZKN+VVwd4jkVbJtuS5Lb3FU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=sanExUpcAf7TPhNumiJmyXjhA8u9u6QpSUASPDnjn/0=; b=LC9+SpZn83E2noEEmikWriGeh4s3W3k3WBfdfsxUGNg/CPvt9YTVnanRt81M/ozsQN xW1q18QGDGYr1XLlWt8j+4xU5lTa6s4Vruyt1LUxrO57RP8RxR473nz+mtPgTxEIrrIy HDJAmWvNskYYnK33jWvXRcpWXcPnCKfyfg+cvEt+fy2PoI3eCUdsBEbvn/vxBgLQB89M 2vU2xPTKbYqtltXLctnuPp/YGn0OVrdajyiDt2rQ5m4gg1yF8oBBdW3jC9Cwb8p/VRXZ bddtfP8m/4y610+OEM8s36ZUPNlJbC81gEejt3pXKEHDdP8CQtPeB9cieuz50q0aRhUX nEhw== X-Gm-Message-State: APjAAAU5Zve9Gv0eb3SWKzhKwXL1Brz3+iu7Jsy5L7o/ZEFMHQESLG8z wlTRZrLSgShJwZGZYQ4NIr7nf/nCgvwVLi3w9WE1Z4qfxFyXCWL/6Xz94lO1cpkDNc5XgkEa8EP irPQvO4YRT0vlAI4= X-Received: by 2002:ae9:f502:: with SMTP id o2mr25648392qkg.89.1577119291960; Mon, 23 Dec 2019 08:41:31 -0800 (PST) X-Google-Smtp-Source: APXvYqzAdDHozY1iPuJQG8QAYeBkagUKF7GQsAXj6//X2u+8eoZT7FHgzzX4GBZWz6jyImaIZhGZjw== X-Received: by 2002:ae9:f502:: with SMTP id o2mr25648381qkg.89.1577119291761; Mon, 23 Dec 2019 08:41:31 -0800 (PST) Date: Mon, 23 Dec 2019 11:41:28 -0500 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Subject: [PULL v2 07/27] virtio: update queue size on guest write Message-ID: <20191223141536.72682-8-mst@redhat.com> References: <20191223141536.72682-1-mst@redhat.com> MIME-Version: 1.0 In-Reply-To: <20191223141536.72682-1-mst@redhat.com> X-Mailer: git-send-email 2.24.1.751.gd10ce2899c X-Mutt-Fcc: =sent X-MC-Unique: WVBpQVurOlOncalRRBQsvg-1 X-Mimecast-Spam-Score: 0 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 205.139.110.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) Content-Type: text/plain; charset="utf-8" Some guests read back queue size after writing it. Update the size immediatly upon write otherwise they get confused. Signed-off-by: Michael S. Tsirkin --- hw/virtio/virtio-pci.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index c6b47a9c73..e5c759e19e 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1256,6 +1256,8 @@ static void virtio_pci_common_write(void *opaque, hwa= ddr addr, break; case VIRTIO_PCI_COMMON_Q_SIZE: proxy->vqs[vdev->queue_sel].num =3D val; + virtio_queue_set_num(vdev, vdev->queue_sel, + proxy->vqs[vdev->queue_sel].num); break; case VIRTIO_PCI_COMMON_Q_MSIX: msix_vector_unuse(&proxy->pci_dev, --=20 MST