From: "David Hildenbrand (Arm)" <david@kernel.org>
To: "Marek Szyprowski" <m.szyprowski@samsung.com>,
"Thierry Reding" <thierry.reding@kernel.org>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Jonathan Hunter" <jonathanh@nvidia.com>,
"Mikko Perttunen" <mperttunen@nvidia.com>,
"Yury Norov" <yury.norov@gmail.com>,
"Rasmus Villemoes" <linux@rasmusvillemoes.dk>,
"Russell King" <linux@armlinux.org.uk>,
"Alexander Gordeev" <agordeev@linux.ibm.com>,
"Gerald Schaefer" <gerald.schaefer@linux.ibm.com>,
"Heiko Carstens" <hca@linux.ibm.com>,
"Vasily Gorbik" <gor@linux.ibm.com>,
"Christian Borntraeger" <borntraeger@linux.ibm.com>,
"Sven Schnelle" <svens@linux.ibm.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Lorenzo Stoakes" <ljs@kernel.org>,
"Liam R. Howlett" <liam@infradead.org>,
"Vlastimil Babka" <vbabka@kernel.org>,
"Mike Rapoport" <rppt@kernel.org>,
"Suren Baghdasaryan" <surenb@google.com>,
"Michal Hocko" <mhocko@suse.com>,
"Robin Murphy" <robin.murphy@arm.com>,
"Sumit Semwal" <sumit.semwal@linaro.org>,
"Benjamin Gaignard" <benjamin.gaignard@collabora.com>,
"Brian Starkey" <Brian.Starkey@arm.com>,
"John Stultz" <jstultz@google.com>,
"T.J. Mercier" <tjmercier@google.com>,
"Christian König" <christian.koenig@amd.com>,
"Steven Rostedt" <rostedt@goodmis.org>,
"Masami Hiramatsu" <mhiramat@kernel.org>,
"Mathieu Desnoyers" <mathieu.desnoyers@efficios.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Will Deacon" <will@kernel.org>
Cc: devicetree@vger.kernel.org, linux-tegra@vger.kernel.org,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
linux-media@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org,
linux-mm@kvack.org, iommu@lists.linux.dev,
linaro-mm-sig@lists.linaro.org,
linux-trace-kernel@vger.kernel.org
Subject: Re: [PATCH v3 06/11] mm/cma: Allow dynamically creating CMA areas
Date: Wed, 8 Jul 2026 10:35:03 +0200 [thread overview]
Message-ID: <e212caac-6c30-448a-9e10-32fff8b842f6@kernel.org> (raw)
In-Reply-To: <3f47aeab-33b1-4966-a5ce-5d6d5261e0e2@samsung.com>
On 7/7/26 12:02, Marek Szyprowski wrote:
> On 01.07.2026 18:08, Thierry Reding wrote:
>> From: Thierry Reding <treding@nvidia.com>
>>
>> There is no technical reason why there should be a limited number of CMA
>> regions, so extract some code into helpers and use them to create extra
>> functions (cma_create() and cma_free()) that allow creating and freeing,
>> respectively, CMA regions dynamically at runtime.
>
>
> Well, the technical reason for not creating cma regions dynamically at
> runtime is that on some architectures (like 32bit ARM) the early fixup
> for the region is needed to make it functional for DMA.
Can you point me at the code that does that? Thanks!
--
Cheers,
David
next prev parent reply other threads:[~2026-07-08 8:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20260701-tegra-vpr-v3-0-d80f7b871bb4@nvidia.com>
[not found] ` <CGME20260701160902eucas1p1214af933ba0f54b85630a3a4e5a4689c@eucas1p1.samsung.com>
[not found] ` <20260701-tegra-vpr-v3-6-d80f7b871bb4@nvidia.com>
2026-07-07 10:02 ` [PATCH v3 06/11] mm/cma: Allow dynamically creating CMA areas Marek Szyprowski
2026-07-08 8:35 ` David Hildenbrand (Arm) [this message]
2026-07-09 5:56 ` Marek Szyprowski
2026-07-09 10:08 ` David Hildenbrand (Arm)
2026-07-09 15:59 ` Thierry Reding
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