From patchwork Tue Nov 12 17:03:37 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kirti Wankhede X-Patchwork-Id: 1193723 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=nvidia.com header.i=@nvidia.com header.b="WnTSTsCx"; dkim-atps=neutral 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 ozlabs.org (Postfix) with ESMTPS id 47CFND5zD8z9sNx for ; Wed, 13 Nov 2019 04:38:52 +1100 (AEDT) Received: from localhost ([::1]:38184 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iUa7t-0000u0-SK for incoming@patchwork.ozlabs.org; Tue, 12 Nov 2019 12:38:49 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:34212) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iUa7B-0000r6-MZ for qemu-devel@nongnu.org; Tue, 12 Nov 2019 12:38:06 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iUa7A-0005J0-MH for qemu-devel@nongnu.org; Tue, 12 Nov 2019 12:38:05 -0500 Received: from hqemgate16.nvidia.com ([216.228.121.65]:8017) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iUa7A-0005Im-Dr for qemu-devel@nongnu.org; Tue, 12 Nov 2019 12:38:04 -0500 Received: from hqpgpgate102.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Tue, 12 Nov 2019 09:32:03 -0800 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate102.nvidia.com (PGP Universal service); Tue, 12 Nov 2019 09:32:59 -0800 X-PGP-Universal: processed; by hqpgpgate102.nvidia.com on Tue, 12 Nov 2019 09:32:59 -0800 Received: from HQMAIL109.nvidia.com (172.20.187.15) by HQMAIL105.nvidia.com (172.20.187.12) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 12 Nov 2019 17:32:58 +0000 Received: from HQMAIL105.nvidia.com (172.20.187.12) by HQMAIL109.nvidia.com (172.20.187.15) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 12 Nov 2019 17:32:58 +0000 Received: from kwankhede-dev.nvidia.com (10.124.1.5) by HQMAIL105.nvidia.com (172.20.187.12) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Tue, 12 Nov 2019 17:32:52 +0000 From: Kirti Wankhede To: , Subject: [PATCH v9 Kernel 2/5] vfio iommu: Add ioctl defination to get dirty pages bitmap. Date: Tue, 12 Nov 2019 22:33:37 +0530 Message-ID: <1573578220-7530-3-git-send-email-kwankhede@nvidia.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1573578220-7530-1-git-send-email-kwankhede@nvidia.com> References: <1573578220-7530-1-git-send-email-kwankhede@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1573579923; bh=hsCfdH2jXMq4AsAY8CLWysoECSs3dz6mo7Od5e+A1nQ=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=WnTSTsCxfyZuYr5B4jwHp9VwBUAYt/aX9LHKlO7qDzEQQVLICYR9bndQww9nBlKY/ 8al3gR/WhXoaK+QVlD/K1JX87hLjrMNBQPCjl6fKrbMQEXIHUnPZGpnldCR1nOdQCh 3ZdbeSWle/0T/c+0oKSnItWSrUPo8bQ0xo3rJQv2kFAKpaBqa1a3xB62rgUSL5W7g9 3fFaoXY+D+Qey5pKGRp81hzCc6UPydO3A/rHdQf1NXLOXg/Il/b7Th2+VCKa/hhBGq 1Y3qDQimx4/P8ISQice0xZo75koOuD7ADdzddcEoUr7SF+IOra6aisNXTrbbXL/8uc fzGZuIHwuILTg== X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 216.228.121.65 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: Zhengxiao.zx@Alibaba-inc.com, kevin.tian@intel.com, yi.l.liu@intel.com, yan.y.zhao@intel.com, kvm@vger.kernel.org, eskultet@redhat.com, ziye.yang@intel.com, qemu-devel@nongnu.org, cohuck@redhat.com, shuangtai.tst@alibaba-inc.com, dgilbert@redhat.com, zhi.a.wang@intel.com, mlevitsk@redhat.com, pasic@linux.ibm.com, aik@ozlabs.ru, Kirti Wankhede , eauger@redhat.com, felipe@nutanix.com, jonathan.davies@nutanix.com, changpeng.liu@intel.com, Ken.Xue@amd.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" All pages pinned by vendor driver through vfio_pin_pages API should be considered as dirty during migration. IOMMU container maintains a list of all such pinned pages. Added an ioctl defination to get bitmap of such pinned pages for requested IO virtual address range. Signed-off-by: Kirti Wankhede Reviewed-by: Neo Jia --- include/uapi/linux/vfio.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 35b09427ad9f..6fd3822aa610 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -902,6 +902,29 @@ struct vfio_iommu_type1_dma_unmap { #define VFIO_IOMMU_ENABLE _IO(VFIO_TYPE, VFIO_BASE + 15) #define VFIO_IOMMU_DISABLE _IO(VFIO_TYPE, VFIO_BASE + 16) +/** + * VFIO_IOMMU_GET_DIRTY_BITMAP - _IOWR(VFIO_TYPE, VFIO_BASE + 17, + * struct vfio_iommu_type1_dirty_bitmap) + * + * IOCTL to get dirty pages bitmap for IOMMU container during migration. + * Get dirty pages bitmap of given IO virtual addresses range using + * struct vfio_iommu_type1_dirty_bitmap. Caller sets argsz, which is size of + * struct vfio_iommu_type1_dirty_bitmap. User should allocate memory to get + * bitmap and should set size of allocated memory in bitmap_size field. + * One bit is used to represent per page consecutively starting from iova + * offset. Bit set indicates page at that offset from iova is dirty. + */ +struct vfio_iommu_type1_dirty_bitmap { + __u32 argsz; + __u32 flags; + __u64 iova; /* IO virtual address */ + __u64 size; /* Size of iova range */ + __u64 bitmap_size; /* in bytes */ + void __user *bitmap; /* one bit per page */ +}; + +#define VFIO_IOMMU_GET_DIRTY_BITMAP _IO(VFIO_TYPE, VFIO_BASE + 17) + /* -------- Additional API for SPAPR TCE (Server POWERPC) IOMMU -------- */ /*