From patchwork Sun Jan 29 02:50:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Longpeng(Mike)" X-Patchwork-Id: 49932 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp1588187wrn; Sat, 28 Jan 2023 19:02:59 -0800 (PST) X-Google-Smtp-Source: AK7set8iu9mAORCxCmC9EZ8b+V9hRN9N4NnWlfO36UH/EeGlkouDDCDBPnIVj5Tkqj1YZd1uOY8W X-Received: by 2002:aa7:8f16:0:b0:593:b491:40b8 with SMTP id x22-20020aa78f16000000b00593b49140b8mr262591pfr.4.1674961379187; Sat, 28 Jan 2023 19:02:59 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1674961379; cv=none; d=google.com; s=arc-20160816; b=ePsxl8EZRyejbidynNIkhjSPt1JSIil5ysVN6NeyfcpF9FFUROEgZgPHFX1i0ZcjGR 4Hh7eN2yW56xZlGyhaDPRZ8IJR9hHBGH+uSb9QKblmt9Yozd6EEeBLFKs9bzqzW4xDf3 SeO0IKmIwEDqNLtfeuP7Q5ctWMhNJYdES3adaz+f5/07gReDFWDF3ZX+ePeIMsVuhUaT xNN8iHn/gzpAuKzpBKoAfdZw8wTITFHBNcbF1iVAPy9rZaA9++/mWONm0hEwCStlK8wV 2Nbu3ht9It53BHh/sYbHmLUTrwXCLRR3/d3sVpEoAi/4yX4R+eXYDFGuVl7gMUTJuflk htzQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=BP1jSVzxrgksQs+95NEJhJsuniEFEackCzl696n0iHU=; b=dmanflnJ8gc3+p854SfSgx/z7dZpf1TnIkLytfg0fFrB14hJqvWn3LSBvTUGw8dE92 vviAL9eH3YwzC/QiTN/7FdXkLGNHrO+oeNuFWPzE4O1jt3Q64OlQfEHGWNxd+In3yfkQ P9VqNm3f2Vd4/M4ccAOkIO91s8OAHmW/zVM7E3Yl1if22gkj4K21oVIetdkLUrDGOl0P uYqXbXzLWVOWfFv35+naknNVDDnd/+nyG9uWhoQ9rVam2Z5H8VUQszYcmY35J02id/zo a3uu42AAwgGDzzxrBSNW/4BDPpAna5KTLQUdWAvqHemmcsKm9y1eFy5FUDJ8enx5haQ6 SYIQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=huawei.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id i22-20020aa78d96000000b00571a5c5eaa5si9171003pfr.150.2023.01.28.19.02.45; Sat, 28 Jan 2023 19:02:59 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=huawei.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234327AbjA2Cup (ORCPT + 99 others); Sat, 28 Jan 2023 21:50:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34868 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231946AbjA2Cuo (ORCPT ); Sat, 28 Jan 2023 21:50:44 -0500 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 154AF1B575 for ; Sat, 28 Jan 2023 18:50:42 -0800 (PST) Received: from kwepemi100025.china.huawei.com (unknown [172.30.72.55]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4P4G5N519fzfZ4C; Sun, 29 Jan 2023 10:50:32 +0800 (CST) Received: from DESKTOP-27KDQMV.china.huawei.com (10.174.148.223) by kwepemi100025.china.huawei.com (7.221.188.158) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Sun, 29 Jan 2023 10:50:38 +0800 From: "Longpeng(Mike)" To: , CC: , , , , , , , , Longpeng Subject: [PATCH v3 1/2] vdpa: support specify the pgprot of vq notification area Date: Sun, 29 Jan 2023 10:50:33 +0800 Message-ID: <20230129025034.2000-2-longpeng2@huawei.com> X-Mailer: git-send-email 2.25.0.windows.1 In-Reply-To: <20230129025034.2000-1-longpeng2@huawei.com> References: <20230129025034.2000-1-longpeng2@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.148.223] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To kwepemi100025.china.huawei.com (7.221.188.158) X-CFilter-Loop: Reflected X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1756324303269554956?= X-GMAIL-MSGID: =?utf-8?q?1756324303269554956?= From: Longpeng Adds get_vq_notification_pgprot operation to vdpa_config_ops to support specify the pgprot of vq norification area. It's an optional operation, the vdpa framework will treat the pgprot of vq notification area as noncached as default as usual. Acked-by: Jason Wang --- drivers/vhost/vdpa.c | 4 +++- include/linux/vdpa.h | 9 +++++++++ 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index 166044642fd5..036fe88425c8 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -1263,7 +1263,9 @@ static vm_fault_t vhost_vdpa_fault(struct vm_fault *vmf) notify = ops->get_vq_notification(vdpa, index); - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + vma->vm_page_prot = ops->get_vq_notification_pgprot ? + ops->get_vq_notification_pgprot(vdpa, index, vma->vm_page_prot) : + pgprot_noncached(vma->vm_page_prot); if (remap_pfn_range(vma, vmf->address & PAGE_MASK, PFN_DOWN(notify.addr), PAGE_SIZE, vma->vm_page_prot)) diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index 6d0f5e4e82c2..07fcf5e6abc8 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -169,6 +169,12 @@ struct vdpa_map_file { * @vdev: vdpa device * @idx: virtqueue index * Returns the notifcation area + * @get_vq_notification_pgprot: Get the pgprot of the vq's notification area (optional) + * @vdev: vdpa device + * @idx: virtqueue index + * @prot: original page protection value of the + * notification area + * Returns pgprot_t: the pgprot of the notification area * @get_vq_irq: Get the irq number of a virtqueue (optional, * but must implemented if require vq irq offloading) * @vdev: vdpa device @@ -305,6 +311,9 @@ struct vdpa_config_ops { struct netlink_ext_ack *extack); struct vdpa_notification_area (*get_vq_notification)(struct vdpa_device *vdev, u16 idx); + pgprot_t (*get_vq_notification_pgprot)(struct vdpa_device *vdev, + u16 idx, + pgprot_t prot); /* vq irq is not expected to be changed once DRIVER_OK is set */ int (*get_vq_irq)(struct vdpa_device *vdev, u16 idx);