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: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-01 16:08 [PATCH v3 00/11] dma-buf: heaps: Add support for Tegra VPR Thierry Reding
2026-07-01 16:08 ` [PATCH v3 01/11] dt-bindings: reserved-memory: Document " Thierry Reding
2026-07-01 16:15 ` sashiko-bot
2026-07-01 19:53 ` Rob Herring (Arm)
2026-07-02 12:58 ` Thierry Reding
2026-07-08 21:18 ` Rob Herring
2026-07-01 16:08 ` [PATCH v3 02/11] dt-bindings: display: tegra: Document memory regions Thierry Reding
2026-07-01 16:13 ` sashiko-bot
2026-07-01 19:53 ` Rob Herring (Arm)
2026-07-02 13:47 ` Thierry Reding
2026-07-01 16:08 ` [PATCH v3 03/11] dt-bindings: gpu: host1x: Document memory-regions for NVDEC Thierry Reding
2026-07-01 16:16 ` sashiko-bot
2026-07-01 16:08 ` [PATCH v3 04/11] arm64/mm: Add set_memory_device() and set_memory_normal() Thierry Reding
2026-07-01 16:23 ` sashiko-bot
2026-07-02 9:18 ` Will Deacon
2026-07-02 13:46 ` Thierry Reding
2026-07-02 16:41 ` Thierry Reding
2026-07-03 17:13 ` Will Deacon
2026-07-06 13:49 ` Thierry Reding
2026-07-07 11:27 ` Will Deacon
2026-07-07 13:17 ` Robin Murphy
2026-07-07 13:36 ` Mike Rapoport
2026-07-07 14:15 ` Robin Murphy
2026-07-08 6:22 ` Mike Rapoport
2026-07-08 12:50 ` Thierry Reding
2026-07-07 12:15 ` Robin Murphy
2026-07-08 6:08 ` Mike Rapoport
2026-07-08 6:36 ` Reserving memory on ACPI systems (was: [PATCH v3 04/11] arm64/mm: Add set_memory_device() and set_memory_normal()) Mike Rapoport
2026-07-01 16:08 ` [PATCH v3 05/11] bitmap: Add bitmap_allocate() function Thierry Reding
2026-07-01 16:08 ` [PATCH v3 06/11] mm/cma: Allow dynamically creating CMA areas Thierry Reding
2026-07-01 16:26 ` sashiko-bot
2026-07-03 18:29 ` David Hildenbrand (Arm)
2026-07-07 10:02 ` Marek Szyprowski
2026-07-08 8:35 ` David Hildenbrand (Arm) [this message]
2026-07-08 8:59 ` David Hildenbrand (Arm)
2026-07-08 23:49 ` T.J. Mercier
2026-07-01 16:08 ` [PATCH v3 07/11] dma-buf: heaps: Add debugfs support Thierry Reding
2026-07-01 16:27 ` sashiko-bot
2026-07-03 12:14 ` Maxime Ripard
2026-07-01 16:08 ` [PATCH v3 08/11] dma-buf: heaps: Add support for Tegra VPR Thierry Reding
2026-07-01 16:34 ` sashiko-bot
2026-07-01 16:08 ` [PATCH v3 09/11] arm64: tegra: Add VPR placeholder node on Tegra234 Thierry Reding
2026-07-01 16:08 ` [PATCH v3 10/11] arm64: tegra: Hook up VPR to host1x Thierry Reding
2026-07-01 22:46 ` sashiko-bot
2026-07-01 16:08 ` [PATCH v3 11/11] arm64: tegra: Add VPR placeholder node on Tegra264 Thierry Reding
2026-07-01 16:32 ` sashiko-bot
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