From patchwork Fri Aug 28 09:59:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wang Xin X-Patchwork-Id: 11742541 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B043C138A for ; Fri, 28 Aug 2020 10:01:08 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 199CA208CA for ; Fri, 28 Aug 2020 10:01:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 199CA208CA Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:33036 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kBbBz-0001Iz-BS for patchwork-qemu-devel@patchwork.kernel.org; Fri, 28 Aug 2020 06:01:07 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53808) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kBbBN-0000GS-6z for qemu-devel@nongnu.org; Fri, 28 Aug 2020 06:00:29 -0400 Received: from szxga06-in.huawei.com ([45.249.212.32]:41174 helo=huawei.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kBbBC-0000Io-VN for qemu-devel@nongnu.org; Fri, 28 Aug 2020 06:00:28 -0400 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 4D8D67CC6A9C9C0E95B8; Fri, 28 Aug 2020 18:00:06 +0800 (CST) Received: from localhost (10.174.149.106) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.487.0; Fri, 28 Aug 2020 17:59:57 +0800 From: Wang Xin To: Subject: [PATCH 2/2] misc/ivshmem: Mark shared memory regions as no vhost Date: Fri, 28 Aug 2020 17:59:53 +0800 Message-ID: <20200828095953.2276-3-wangxinxin.wang@huawei.com> X-Mailer: git-send-email 2.26.0.windows.1 In-Reply-To: <20200828095953.2276-1-wangxinxin.wang@huawei.com> References: <20200828095953.2276-1-wangxinxin.wang@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.149.106] X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.32; envelope-from=wangxinxin.wang@huawei.com; helo=huawei.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/28 06:00:07 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Wang Xin , jianjay.zhou@huawei.com, weidong.huang@huawei.com, dgilbert@redhat.com, mst@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Since ivshmem_bar2 not normal RAM in Guest, and it shouldn't have vhost DMAing into them, exclude it from the vhost sections, mark the shared memory regions as novhost. Signed-off-by: Wang Xin --- hw/misc/ivshmem.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c index 2b6882face..1f3a7a1dfc 100644 --- a/hw/misc/ivshmem.c +++ b/hw/misc/ivshmem.c @@ -499,6 +499,7 @@ static void process_msg_shmem(IVShmemState *s, int fd, Error **errp) } s->ivshmem_bar2 = &s->server_bar2; + memory_region_set_no_vhost(s->ivshmem_bar2, true); } static void process_msg_disconnect(IVShmemState *s, uint16_t posn, @@ -855,6 +856,7 @@ static void ivshmem_common_realize(PCIDevice *dev, Error **errp) s->ivshmem_bar2 = host_memory_backend_get_memory(s->hostmem); host_memory_backend_set_mapped(s->hostmem, true); + memory_region_set_no_vhost(s->ivshmem_bar2, true); } else { Chardev *chr = qemu_chr_fe_get_driver(&s->server_chr); assert(chr);