From: Christoph Hellwig <hch@infradead.org>
To: "T.J. Mercier" <tjmercier@google.com>
Cc: Robin Murphy <robin.murphy@arm.com>,
Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Catalin Marinas <catalin.marinas@arm.com>,
isaacmanjarres@google.com, iommu@lists.linux.dev,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] iommu/dma: Respect SWIOTLB force_bounce
Date: Wed, 1 May 2024 22:07:35 -0700 [thread overview]
Message-ID: <ZjMfl2G377qexhi-@infradead.org> (raw)
In-Reply-To: <20240501201319.586289-1-tjmercier@google.com>
On Wed, May 01, 2024 at 08:13:18PM +0000, T.J. Mercier wrote:
> iommu_dma_map_page and iommu_dma_map_sg conditionally use SWIOTLB, but
> checking if force_bounce is set for the device is not part of that
> condition. Check if devices have requested to force SWIOTLB use as part
> of deciding to take the existing SWIOTLB paths.
This fails to explain why you'd want this somewhat surprising behavior,
and why you consider it a bug fix.
next prev parent reply other threads:[~2024-05-02 5:07 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-01 20:13 T.J. Mercier
2024-05-02 5:07 ` Christoph Hellwig [this message]
2024-05-02 12:50 ` Robin Murphy
2024-05-02 16:02 ` T.J. Mercier
2024-05-02 16:54 ` Robin Murphy
2024-05-02 17:54 ` T.J. Mercier
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=ZjMfl2G377qexhi-@infradead.org \
--to=hch@infradead.org \
--cc=akpm@linux-foundation.org \
--cc=catalin.marinas@arm.com \
--cc=iommu@lists.linux.dev \
--cc=isaacmanjarres@google.com \
--cc=joro@8bytes.org \
--cc=linux-kernel@vger.kernel.org \
--cc=robin.murphy@arm.com \
--cc=tjmercier@google.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
all inboxes | Powered by JetHome®