From: Catalin Marinas <catalin.marinas@arm•com>
To: Baruch Siach <baruch@tkos•co.il>
Cc: "Christoph Hellwig" <hch@lst•de>,
"Marek Szyprowski" <m.szyprowski@samsung•com>,
"Will Deacon" <will@kernel•org>,
"Robin Murphy" <robin.murphy@arm•com>,
iommu@lists•linux.dev, linux-arm-kernel@lists•infradead.org,
linux-kernel@vger•kernel.org, linuxppc-dev@lists•ozlabs.org,
linux-s390@vger•kernel.org, "Petr Tesařík" <petr@tesarici•cz>,
"Ramon Fried" <ramon@neureality•ai>,
"Elad Nachman" <enachman@marvell•com>
Subject: Re: [PATCH v6 RESED 1/2] dma: replace zone_dma_bits by zone_dma_limit
Date: Mon, 12 Aug 2024 12:22:10 +0100 [thread overview]
Message-ID: <ZrnwYrZiHJ11xrlr@arm.com> (raw)
In-Reply-To: <17c067618b93e5d71f19c37826d54db4299621a3.1723359916.git.baruch@tkos.co.il>
On Sun, Aug 11, 2024 at 10:09:35AM +0300, Baruch Siach wrote:
> From: Catalin Marinas <catalin.marinas@arm•com>
>
> Hardware DMA limit might not be power of 2. When RAM range starts above
> 0, say 4GB, DMA limit of 30 bits should end at 5GB. A single high bit
> can not encode this limit.
>
> Use plain address for DMA zone limit.
>
> Since DMA zone can now potentially span beyond 4GB physical limit of
> DMA32, make sure to use DMA zone for GFP_DMA32 allocations in that case.
>
> Signed-off-by: Catalin Marinas <catalin.marinas@arm•com>
> Co-developed-by: Baruch Siach <baruch@tkos•co.il>
> Signed-off-by: Baruch Siach <baruch@tkos•co.il>
You might want to say that no functional change is expected with this
patch. The patch looks fine.
Reviewed-by: Catalin Marinas <catalin.marinas@arm•com>
next prev parent reply other threads:[~2024-08-12 11:48 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-11 7:09 [PATCH v6 RESED 0/2] dma: support DMA zone starting above 4GB Baruch Siach
2024-08-11 7:09 ` [PATCH v6 RESED 1/2] dma: replace zone_dma_bits by zone_dma_limit Baruch Siach
2024-08-12 5:52 ` Petr Tesarik
2024-08-12 11:22 ` Catalin Marinas [this message]
2024-08-16 11:52 ` Will Deacon
2024-08-16 14:37 ` Petr Tesařík
2024-08-26 19:28 ` Marek Szyprowski
2024-08-27 4:52 ` Baruch Siach
2024-08-27 6:14 ` Marek Szyprowski
2024-08-27 7:03 ` Baruch Siach
2024-08-27 7:46 ` Marek Szyprowski
2024-08-29 13:42 ` Neil Armstrong
2024-08-29 14:38 ` Robin Murphy
2024-08-29 14:54 ` neil.armstrong
2024-08-11 7:09 ` [PATCH v6 RESED 2/2] arm64: support DMA zone above 4GB Baruch Siach
2024-08-12 5:54 ` Petr Tesarik
2024-08-22 4:18 ` [PATCH v6 RESED 0/2] dma: support DMA zone starting " Christoph Hellwig
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=ZrnwYrZiHJ11xrlr@arm.com \
--to=catalin.marinas@arm$(echo .)com \
--cc=baruch@tkos$(echo .)co.il \
--cc=enachman@marvell$(echo .)com \
--cc=hch@lst$(echo .)de \
--cc=iommu@lists$(echo .)linux.dev \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
--cc=linux-kernel@vger$(echo .)kernel.org \
--cc=linux-s390@vger$(echo .)kernel.org \
--cc=linuxppc-dev@lists$(echo .)ozlabs.org \
--cc=m.szyprowski@samsung$(echo .)com \
--cc=petr@tesarici$(echo .)cz \
--cc=ramon@neureality$(echo .)ai \
--cc=robin.murphy@arm$(echo .)com \
--cc=will@kernel$(echo .)org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
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