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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 86503C433F5 for ; Wed, 17 Nov 2021 17:13:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6100D61A62 for ; Wed, 17 Nov 2021 17:13:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239320AbhKQRQF (ORCPT ); Wed, 17 Nov 2021 12:16:05 -0500 Received: from marcansoft.com ([212.63.210.85]:33428 "EHLO mail.marcansoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231313AbhKQRQE (ORCPT ); Wed, 17 Nov 2021 12:16:04 -0500 Received: from [127.0.0.1] (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: hector@marcansoft.com) by mail.marcansoft.com (Postfix) with ESMTPSA id 586F441F12; Wed, 17 Nov 2021 17:13:02 +0000 (UTC) From: Hector Martin To: Sven Peter , Will Deacon Cc: Alyssa Rosenzweig , Robin Murphy , Joerg Roedel , linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Hector Martin Subject: [PATCH] iommu/io-pgtable-arm: Fix table descriptor paddr formatting Date: Thu, 18 Nov 2021 02:12:13 +0900 Message-Id: <20211117171213.243584-1-marcan@marcan.st> X-Mailer: git-send-email 2.33.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Table descriptors were being installed without properly formatting the address using paddr_to_iopte, which does not match up with the iopte_deref in __arm_lpae_map. This is incorrect for the LPAE pte format, as it does not handle the high bits properly. This was found on Apple T6000 DARTs, which require a new pte format (different shift); adding support for that to paddr_to_iopte/iopte_to_paddr caused it to break badly, as even <48-bit addresses would end up incorrect in that case. Signed-off-by: Hector Martin --- drivers/iommu/io-pgtable-arm.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c index dd9e47189d0d..b636e2737607 100644 --- a/drivers/iommu/io-pgtable-arm.c +++ b/drivers/iommu/io-pgtable-arm.c @@ -315,12 +315,12 @@ static int arm_lpae_init_pte(struct arm_lpae_io_pgtable *data, static arm_lpae_iopte arm_lpae_install_table(arm_lpae_iopte *table, arm_lpae_iopte *ptep, arm_lpae_iopte curr, - struct io_pgtable_cfg *cfg) + struct arm_lpae_io_pgtable *data) { arm_lpae_iopte old, new; - new = __pa(table) | ARM_LPAE_PTE_TYPE_TABLE; - if (cfg->quirks & IO_PGTABLE_QUIRK_ARM_NS) + new = paddr_to_iopte(__pa(table), data) | ARM_LPAE_PTE_TYPE_TABLE; + if (data->iop.cfg.quirks & IO_PGTABLE_QUIRK_ARM_NS) new |= ARM_LPAE_PTE_NSTABLE; /* @@ -332,11 +332,11 @@ static arm_lpae_iopte arm_lpae_install_table(arm_lpae_iopte *table, old = cmpxchg64_relaxed(ptep, curr, new); - if (cfg->coherent_walk || (old & ARM_LPAE_PTE_SW_SYNC)) + if (data->iop.cfg.coherent_walk || (old & ARM_LPAE_PTE_SW_SYNC)) return old; /* Even if it's not ours, there's no point waiting; just kick it */ - __arm_lpae_sync_pte(ptep, 1, cfg); + __arm_lpae_sync_pte(ptep, 1, &data->iop.cfg); if (old == curr) WRITE_ONCE(*ptep, new | ARM_LPAE_PTE_SW_SYNC); @@ -380,7 +380,7 @@ static int __arm_lpae_map(struct arm_lpae_io_pgtable *data, unsigned long iova, if (!cptep) return -ENOMEM; - pte = arm_lpae_install_table(cptep, ptep, 0, cfg); + pte = arm_lpae_install_table(cptep, ptep, 0, data); if (pte) __arm_lpae_free_pages(cptep, tblsz, cfg); } else if (!cfg->coherent_walk && !(pte & ARM_LPAE_PTE_SW_SYNC)) { @@ -592,7 +592,7 @@ static size_t arm_lpae_split_blk_unmap(struct arm_lpae_io_pgtable *data, __arm_lpae_init_pte(data, blk_paddr, pte, lvl, 1, &tablep[i]); } - pte = arm_lpae_install_table(tablep, ptep, blk_pte, cfg); + pte = arm_lpae_install_table(tablep, ptep, blk_pte, data); if (pte != blk_pte) { __arm_lpae_free_pages(tablep, tablesz, cfg); /* -- 2.33.0