From: David Stevens <stevensd@chromium.org>
To: Robin Murphy <robin.murphy@arm.com>, Will Deacon <will@kernel.org>
Cc: Joerg Roedel <joro@8bytes.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 v3 0/5] Fixes for dma-iommu swiotlb bounce buffers
Date: Wed, 11 Aug 2021 11:42:42 +0900 [thread overview]
Message-ID: <20210811024247.1144246-1-stevensd@google.com> (raw)
From: David Stevens <stevensd@chromium.org>
This patch set includes various fixes for dma-iommu's swiotlb bounce
buffers for untrusted devices. There are three fixes for correctness
issues, one performance issue, and one general cleanup.
The min_align_mask issue was found when running fio on an untrusted nvme
device with bs=512. The other issues were found via code inspection, so
I don't have any specific use cases where things were not working, nor
any concrete performance numbers.
v2 -> v3:
- Add new patch to address min_align_mask bug
- Set SKIP_CPU_SYNC flag after syncing in map/unmap
- Properly call arch_sync_dma_for_cpu in iommu_dma_sync_sg_for_cpu
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 (5):
dma-iommu: fix sync_sg with swiotlb
dma-iommu: fix arch_sync_dma for map
dma-iommu: add SKIP_CPU_SYNC after syncing
dma-iommu: Check CONFIG_SWIOTLB more broadly
dma-iommu: account for min_align_mask
drivers/iommu/dma-iommu.c | 97 +++++++++++++++++++++------------------
1 file changed, 53 insertions(+), 44 deletions(-)
--
2.32.0.605.g8dce9f2422-goog
next reply other threads:[~2021-08-11 2:44 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-11 2:42 David Stevens [this message]
2021-08-11 2:42 ` [PATCH v3 1/5] dma-iommu: fix sync_sg with swiotlb David Stevens
2021-08-11 5:57 ` Christoph Hellwig
2021-08-11 18:22 ` Robin Murphy
2021-08-11 2:42 ` [PATCH v3 2/5] dma-iommu: fix arch_sync_dma for map David Stevens
2021-08-11 6:01 ` Christoph Hellwig
2021-08-11 18:47 ` Robin Murphy
2021-08-12 9:21 ` David Stevens
2021-08-12 10:38 ` Robin Murphy
2021-08-11 2:42 ` [PATCH v3 3/5] dma-iommu: add SKIP_CPU_SYNC after syncing David Stevens
2021-08-11 6:07 ` Christoph Hellwig
2021-08-11 19:00 ` Robin Murphy
2021-08-11 2:42 ` [PATCH v3 4/5] dma-iommu: Check CONFIG_SWIOTLB more broadly David Stevens
2021-08-11 19:02 ` Robin Murphy
2021-08-11 2:42 ` [PATCH v3 5/5] dma-iommu: account for min_align_mask David Stevens
2021-08-11 9:26 ` Mi, Dapeng1
2021-08-11 19:12 ` Robin Murphy
2021-08-12 1:45 ` David Stevens
2021-08-12 9:57 ` Robin Murphy
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210811024247.1144246-1-stevensd@google.com \
--to=stevensd@chromium.org \
--cc=baolu.lu@linux.intel.com \
--cc=iommu@lists.linux-foundation.org \
--cc=joro@8bytes.org \
--cc=linux-kernel@vger.kernel.org \
--cc=murphyt7@tcd.ie \
--cc=robin.murphy@arm.com \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).