From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 084D6C433B4 for ; Fri, 7 May 2021 10:25:11 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 75BE46145D for ; Fri, 7 May 2021 10:25:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 75BE46145D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-ID:Date: Subject:CC:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ttTbIBPKacPcED5eWyOuFc9FJhVPJv3fPncWFrvVKpc=; b=G8/TwKweAP7+orrLrrrrS+TEn 7Godv3TTmcAz9kCCqJ1IpdlY4grv8J6z66N8THPREYUw8ld98UZ4GZKNyUNfnt9sZHnqpJ73KClQy yptVHlxtJrTr7Ih/avZcUWRyVmIaZoYsBCx4FwXHEWoFOH8ImanoH/WOVIYPWZv1kQ1adtUZLVToQ 3aLIs0J83+KYRyANpbbS3HLnlGuwf090siWjbmhj9M/rLR76fUNMoNKBY9UmgF0U85L4aWvuOI2i9 EgCPQbZeIXaekGXrS+Z7JzmPjDv31fPIHxLLabPsSaES4kIMrUCZQMqQ5+cRpHRegqB5IENBpKjhy UUtwYjC4Q==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lexda-006nSm-PP; Fri, 07 May 2021 10:23:14 +0000 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lexdD-006nNe-2c for linux-arm-kernel@desiato.infradead.org; Fri, 07 May 2021 10:22:51 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Type:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:CC:To:From:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=TXFuJ3nOwBWW6UzXlhi3/nV/nXHxTOPdx5RuSMGcNIY=; b=o8gML5F3um0D75hWZEAs1Cqe69 Iut2JiX0cm+e+BQaiaR8pzlQtv1xdM7rgKFV/0d5Y4Tqw7c1g8VkWpVmgz9JfeZSN5WNy2qBe6g/D g0ukFqLqpQ4Mi93ZzxSbN0c4vK86Yh55eSvfLwX7SsLdkC3OzAIG0s+3b9MuIPt30D/m9l2aw53O9 wWM2JqxsoOVbdcNRezVb6iDFZBlg0ExDntVseDpPAA54MMPTMgGGoP049V32CHqU1SCTItR13P7VB rgJfQbjp5v/uDOt1WJJSztufR2dfmexLBNOmlaeax/gZB5xUGnX6evKWxb5SYIKpG6/pNUTNDXMJV 7jm50vZQ==; Received: from szxga04-in.huawei.com ([45.249.212.190]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lexd8-006m7W-KH for linux-arm-kernel@lists.infradead.org; Fri, 07 May 2021 10:22:49 +0000 Received: from DGGEMS408-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4Fc5z26gNgzqTB4; Fri, 7 May 2021 18:19:26 +0800 (CST) Received: from DESKTOP-5IS4806.china.huawei.com (10.174.187.224) by DGGEMS408-HUB.china.huawei.com (10.3.19.208) with Microsoft SMTP Server id 14.3.498.0; Fri, 7 May 2021 18:22:35 +0800 From: Keqian Zhu To: , , , Robin Murphy , "Will Deacon" , Joerg Roedel , "Jean-Philippe Brucker" , Lu Baolu , "Yi Sun" , Tian Kevin CC: Alex Williamson , Kirti Wankhede , Cornelia Huck , Jonathan Cameron , , , , Subject: [RFC PATCH v4 05/13] iommu/io-pgtable-arm: Add and realize sync_dirty_log ops Date: Fri, 7 May 2021 18:22:03 +0800 Message-ID: <20210507102211.8836-6-zhukeqian1@huawei.com> X-Mailer: git-send-email 2.8.4.windows.1 In-Reply-To: <20210507102211.8836-1-zhukeqian1@huawei.com> References: <20210507102211.8836-1-zhukeqian1@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.187.224] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210507_032247_052933_95FFF6BA X-CRM114-Status: GOOD ( 15.67 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Kunkun Jiang During dirty log tracking, user will try to retrieve dirty log from iommu if it supports hardware dirty log. Scan leaf TTD and treat it is dirty if it's writable. As we just set DBM bit for stage1 mapping, so check whether AP[2] is not set. Co-developed-by: Keqian Zhu Signed-off-by: Kunkun Jiang --- drivers/iommu/io-pgtable-arm.c | 89 ++++++++++++++++++++++++++++++++++ include/linux/io-pgtable.h | 4 ++ 2 files changed, 93 insertions(+) diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c index b9f6e3370032..155d440099ab 100644 --- a/drivers/iommu/io-pgtable-arm.c +++ b/drivers/iommu/io-pgtable-arm.c @@ -877,6 +877,94 @@ static size_t arm_lpae_merge_page(struct io_pgtable_ops *ops, unsigned long iova return __arm_lpae_merge_page(data, iova, paddr, size, lvl, ptep, prot); } +static int __arm_lpae_sync_dirty_log(struct arm_lpae_io_pgtable *data, + unsigned long iova, size_t size, + int lvl, arm_lpae_iopte *ptep, + unsigned long *bitmap, + unsigned long base_iova, + unsigned long bitmap_pgshift) +{ + arm_lpae_iopte pte; + struct io_pgtable *iop = &data->iop; + size_t base, next_size; + unsigned long offset; + int nbits, ret; + + if (WARN_ON(lvl == ARM_LPAE_MAX_LEVELS)) + return -EINVAL; + + ptep += ARM_LPAE_LVL_IDX(iova, lvl, data); + pte = READ_ONCE(*ptep); + if (WARN_ON(!pte)) + return -EINVAL; + + if (size == ARM_LPAE_BLOCK_SIZE(lvl, data)) { + if (iopte_leaf(pte, lvl, iop->fmt)) { + if (pte & ARM_LPAE_PTE_AP_RDONLY) + return 0; + + /* It is writable, set the bitmap */ + nbits = size >> bitmap_pgshift; + offset = (iova - base_iova) >> bitmap_pgshift; + bitmap_set(bitmap, offset, nbits); + return 0; + } + /* Current level is table, traverse next level */ + next_size = ARM_LPAE_BLOCK_SIZE(lvl + 1, data); + ptep = iopte_deref(pte, data); + for (base = 0; base < size; base += next_size) { + ret = __arm_lpae_sync_dirty_log(data, iova + base, + next_size, lvl + 1, ptep, bitmap, + base_iova, bitmap_pgshift); + if (ret) + return ret; + } + return 0; + } else if (iopte_leaf(pte, lvl, iop->fmt)) { + if (pte & ARM_LPAE_PTE_AP_RDONLY) + return 0; + + /* Though the size is too small, also set bitmap */ + nbits = size >> bitmap_pgshift; + offset = (iova - base_iova) >> bitmap_pgshift; + bitmap_set(bitmap, offset, nbits); + return 0; + } + + /* Keep on walkin */ + ptep = iopte_deref(pte, data); + return __arm_lpae_sync_dirty_log(data, iova, size, lvl + 1, ptep, + bitmap, base_iova, bitmap_pgshift); +} + +static int arm_lpae_sync_dirty_log(struct io_pgtable_ops *ops, + unsigned long iova, size_t size, + unsigned long *bitmap, + unsigned long base_iova, + unsigned long bitmap_pgshift) +{ + struct arm_lpae_io_pgtable *data = io_pgtable_ops_to_data(ops); + struct io_pgtable_cfg *cfg = &data->iop.cfg; + arm_lpae_iopte *ptep = data->pgd; + int lvl = data->start_level; + long iaext = (s64)iova >> cfg->ias; + + if (WARN_ON(!size || (size & cfg->pgsize_bitmap) != size)) + return -EINVAL; + + if (cfg->quirks & IO_PGTABLE_QUIRK_ARM_TTBR1) + iaext = ~iaext; + if (WARN_ON(iaext)) + return -EINVAL; + + if (data->iop.fmt != ARM_64_LPAE_S1 && + data->iop.fmt != ARM_32_LPAE_S1) + return -EINVAL; + + return __arm_lpae_sync_dirty_log(data, iova, size, lvl, ptep, + bitmap, base_iova, bitmap_pgshift); +} + static void arm_lpae_restrict_pgsizes(struct io_pgtable_cfg *cfg) { unsigned long granule, page_sizes; @@ -957,6 +1045,7 @@ arm_lpae_alloc_pgtable(struct io_pgtable_cfg *cfg) .iova_to_phys = arm_lpae_iova_to_phys, .split_block = arm_lpae_split_block, .merge_page = arm_lpae_merge_page, + .sync_dirty_log = arm_lpae_sync_dirty_log, }; return data; diff --git a/include/linux/io-pgtable.h b/include/linux/io-pgtable.h index e77576d946a2..329fa99d9d96 100644 --- a/include/linux/io-pgtable.h +++ b/include/linux/io-pgtable.h @@ -171,6 +171,10 @@ struct io_pgtable_ops { size_t size); size_t (*merge_page)(struct io_pgtable_ops *ops, unsigned long iova, phys_addr_t phys, size_t size, int prot); + int (*sync_dirty_log)(struct io_pgtable_ops *ops, + unsigned long iova, size_t size, + unsigned long *bitmap, unsigned long base_iova, + unsigned long bitmap_pgshift); }; /** -- 2.19.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel