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From: David Stevens <stevensd@chromium.org>
To: Robin Murphy <robin.murphy@arm.com>
Cc: Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
	Lu Baolu <baolu.lu@linux.intel.com>, Tom Murphy <murphyt7@tcd.ie>,
	iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
	David Stevens <stevensd@chromium.org>
Subject: [PATCH v2 0/4] Fixes for dma-iommu swiotlb bounce buffers
Date: Fri,  9 Jul 2021 12:34:58 +0900	[thread overview]
Message-ID: <20210709033502.3545820-1-stevensd@google.com> (raw)

From: David Stevens <stevensd@chromium.org>

This patch set includes two fixes for bugs caused by mixing up the
original buffer's physical address and bounce buffer's physical address.
It also includes a performance fix that avoids an extra copy, as well as
a general cleanup fix.

The issues were found via code inspection, so I don't have any specific
use cases where things were not working, or any performance numbers.

v1 -> v2:
 - Split fixes into dedicated patches
 - Less invasive changes to fix arch_sync when mapping
 - Leave dev_is_untrusted check for strict iommu

David Stevens (4):
  dma-iommu: fix sync_sg with swiotlb
  dma-iommu: fix arch_sync_dma for map with swiotlb
  dma-iommu: pass SKIP_CPU_SYNC to swiotlb unmap
  dma-iommu: Check CONFIG_SWIOTLB more broadly

 drivers/iommu/dma-iommu.c | 63 ++++++++++++++++++++-------------------
 1 file changed, 33 insertions(+), 30 deletions(-)

-- 
2.32.0.93.g670b81a890-goog


             reply	other threads:[~2021-07-09  3:35 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-09  3:34 David Stevens [this message]
2021-07-09  3:34 ` [PATCH v2 1/4] dma-iommu: fix sync_sg with swiotlb David Stevens
2021-08-02 13:30   ` Will Deacon
2021-08-05  3:40     ` David Stevens
2021-07-09  3:35 ` [PATCH v2 2/4] dma-iommu: fix arch_sync_dma for map " David Stevens
2021-08-02 13:40   ` Will Deacon
2021-08-02 13:50     ` Will Deacon
2021-07-09  3:35 ` [PATCH v2 3/4] dma-iommu: pass SKIP_CPU_SYNC to swiotlb unmap David Stevens
2021-08-02 13:54   ` Will Deacon
2021-08-05  5:26     ` David Stevens
2021-08-06 11:38       ` Will Deacon
2021-07-09  3:35 ` [PATCH v2 4/4] dma-iommu: Check CONFIG_SWIOTLB more broadly David Stevens

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