From nobody Sat Apr 27 00:52:07 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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=fail(p=none dis=none) header.from=huawei.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1631584625810712.6577061646532; Mon, 13 Sep 2021 18:57:05 -0700 (PDT) Received: from localhost ([::1]:51424 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mPxh2-0008Et-Rm for importer@patchew.org; Mon, 13 Sep 2021 21:57:04 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39998) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mPxeD-0004TE-UJ for qemu-devel@nongnu.org; Mon, 13 Sep 2021 21:54:09 -0400 Received: from szxga01-in.huawei.com ([45.249.212.187]:2535) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mPxeB-0005cJ-RI for qemu-devel@nongnu.org; Mon, 13 Sep 2021 21:54:09 -0400 Received: from dggemv711-chm.china.huawei.com (unknown [172.30.72.57]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4H7mZl38KVzVkJY; Tue, 14 Sep 2021 09:53:03 +0800 (CST) Received: from dggema765-chm.china.huawei.com (10.1.198.207) by dggemv711-chm.china.huawei.com (10.1.198.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2308.8; Tue, 14 Sep 2021 09:54:02 +0800 Received: from DESKTOP-6NKE0BC.china.huawei.com (10.174.185.210) by dggema765-chm.china.huawei.com (10.1.198.207) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.8; Tue, 14 Sep 2021 09:54:02 +0800 From: Kunkun Jiang To: Alex Williamson , Eric Auger , Kirti Wankhede , "open list:All patches CC here" Subject: [PATCH v2 2/2] vfio/common: Add trace point when a MMIO RAM section less than PAGE_SIZE Date: Tue, 14 Sep 2021 09:53:26 +0800 Message-ID: <20210914015326.1494-3-jiangkunkun@huawei.com> X-Mailer: git-send-email 2.26.2.windows.1 In-Reply-To: <20210914015326.1494-1-jiangkunkun@huawei.com> References: <20210914015326.1494-1-jiangkunkun@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.174.185.210] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggema765-chm.china.huawei.com (10.1.198.207) X-CFilter-Loop: Reflected 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=45.249.212.187; envelope-from=jiangkunkun@huawei.com; helo=szxga01-in.huawei.com 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_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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: wanghaibin.wang@huawei.com, Kunkun Jiang , tangnianyao@huawei.com, ganqixin@huawei.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1631584627608100001 Content-Type: text/plain; charset="utf-8" The MSI-X structures of some devices and other non-MSI-X structures are in the same BAR. They may share one host page, especially in the case of large page granularity, such as 64K. For example, MSIX-Table size of 82599 NIC is 0x30 and the offset in Bar 3(size 64KB) is 0x0. If host page size is 64KB. vfio_listener_region_add() will be called to map the remaining range (0x30-0xffff). And it will return early at 'int128_ge((int128_make64(iova), llend))' and hasn't any message. Let's add a trace point to informed users like commit 5c08600547c0 ("vfio: Use a trace point when a RAM section cannot be DMA mapped") did. Signed-off-by: Kunkun Jiang --- hw/vfio/common.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 8728d4d5c2..2fc6213c0f 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -892,6 +892,13 @@ static void vfio_listener_region_add(MemoryListener *l= istener, llend =3D int128_and(llend, int128_exts64(qemu_real_host_page_mask)); =20 if (int128_ge(int128_make64(iova), llend)) { + if (memory_region_is_ram_device(section->mr)) { + trace_vfio_listener_region_add_no_dma_map( + memory_region_name(section->mr), + section->offset_within_address_space, + int128_getlo(section->size), + qemu_real_host_page_size); + } return; } end =3D int128_get64(int128_sub(llend, int128_one())); --=20 2.23.0