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=-9.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 A01EBC00454 for ; Wed, 11 Dec 2019 15:26:56 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (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 76183222C4 for ; Wed, 11 Dec 2019 15:26:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="oCZkrgaf" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 76183222C4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 53BBD86F88; Wed, 11 Dec 2019 15:26:56 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ZRq11Ne+VZQO; Wed, 11 Dec 2019 15:26:55 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by hemlock.osuosl.org (Postfix) with ESMTP id AFCE886F8D; Wed, 11 Dec 2019 15:26:55 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 9D980C1796; Wed, 11 Dec 2019 15:26:55 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id D06E0C0881 for ; Wed, 11 Dec 2019 15:26:53 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id D86A786BE2 for ; Wed, 11 Dec 2019 15:26:52 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id UZE-UzhZH5uj for ; Wed, 11 Dec 2019 15:26:52 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by hemlock.osuosl.org (Postfix) with ESMTPS id 59137869FE for ; Wed, 11 Dec 2019 15:26:52 +0000 (UTC) Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 748F422B48; Wed, 11 Dec 2019 15:26:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576078012; bh=dAvEyrdOLPuy69abLBwLiuLHza6QgT3/miqzjjbp3oE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oCZkrgaf1vwUj/GKrLsb+40dLV+61nOZT58IpjYT08qD8qmDOwCMym1Dhhv9y1R2U Ee8b9q/KD2hxd6f8yjZo7X6lSt7ZPmXDMuqgonULtrhoYkI5hA+DXfMQAWJh2Bbxrg hy5BS4hSJ6NDpBCFl9D2aAlGgIc6xZNDryMRoZmU= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 07/79] iommu/tegra-smmu: Fix page tables in > 4 GiB memory Date: Wed, 11 Dec 2019 10:25:31 -0500 Message-Id: <20191211152643.23056-7-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191211152643.23056-1-sashal@kernel.org> References: <20191211152643.23056-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Cc: Sasha Levin , linux-tegra@vger.kernel.org, iommu@lists.linux-foundation.org, Thierry Reding , Joerg Roedel X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" From: Thierry Reding [ Upstream commit 96d3ab802e4930a29a33934373157d6dff1b2c7e ] Page tables that reside in physical memory beyond the 4 GiB boundary are currently not working properly. The reason is that when the physical address for page directory entries is read, it gets truncated at 32 bits and can cause crashes when passing that address to the DMA API. Fix this by first casting the PDE value to a dma_addr_t and then using the page frame number mask for the SMMU instance to mask out the invalid bits, which are typically used for mapping attributes, etc. Signed-off-by: Thierry Reding Signed-off-by: Joerg Roedel Signed-off-by: Sasha Levin --- drivers/iommu/tegra-smmu.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 121d3cb7ddd1d..fa0ecb5e63809 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -164,9 +164,9 @@ static bool smmu_dma_addr_valid(struct tegra_smmu *smmu, dma_addr_t addr) return (addr & smmu->pfn_mask) == addr; } -static dma_addr_t smmu_pde_to_dma(u32 pde) +static dma_addr_t smmu_pde_to_dma(struct tegra_smmu *smmu, u32 pde) { - return pde << 12; + return (dma_addr_t)(pde & smmu->pfn_mask) << 12; } static void smmu_flush_ptc_all(struct tegra_smmu *smmu) @@ -551,6 +551,7 @@ static u32 *tegra_smmu_pte_lookup(struct tegra_smmu_as *as, unsigned long iova, dma_addr_t *dmap) { unsigned int pd_index = iova_pd_index(iova); + struct tegra_smmu *smmu = as->smmu; struct page *pt_page; u32 *pd; @@ -559,7 +560,7 @@ static u32 *tegra_smmu_pte_lookup(struct tegra_smmu_as *as, unsigned long iova, return NULL; pd = page_address(as->pd); - *dmap = smmu_pde_to_dma(pd[pd_index]); + *dmap = smmu_pde_to_dma(smmu, pd[pd_index]); return tegra_smmu_pte_offset(pt_page, iova); } @@ -601,7 +602,7 @@ static u32 *as_get_pte(struct tegra_smmu_as *as, dma_addr_t iova, } else { u32 *pd = page_address(as->pd); - *dmap = smmu_pde_to_dma(pd[pde]); + *dmap = smmu_pde_to_dma(smmu, pd[pde]); } return tegra_smmu_pte_offset(as->pts[pde], iova); @@ -626,7 +627,7 @@ static void tegra_smmu_pte_put_use(struct tegra_smmu_as *as, unsigned long iova) if (--as->count[pde] == 0) { struct tegra_smmu *smmu = as->smmu; u32 *pd = page_address(as->pd); - dma_addr_t pte_dma = smmu_pde_to_dma(pd[pde]); + dma_addr_t pte_dma = smmu_pde_to_dma(smmu, pd[pde]); tegra_smmu_set_pde(as, iova, 0); -- 2.20.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu