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The CMA heap's name in devtmpfs can vary depending on how the heap is defined. Its name defaults to "reserved", but if a CMA area is defined in the devicetree, the heap takes on the devicetree node's name, such as "default-pool" or "linux,cma". To simplify naming, unconditionally name it "default_cma_region", but keep a legacy node in place backed by the same underlying allocator for backwards compatibility. Reviewed-by: Maxime Ripard <mripard@kernel.org> Signed-off-by: Jared Kangas <jkangas@redhat.com> Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org> Link: https://lore.kernel.org/r/20250610131231.1724627-4-jkangas@redhat.com
24 lines
847 B
Text
24 lines
847 B
Text
config DMABUF_HEAPS_SYSTEM
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bool "DMA-BUF System Heap"
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depends on DMABUF_HEAPS
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help
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Choose this option to enable the system dmabuf heap. The system heap
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is backed by pages from the buddy allocator. If in doubt, say Y.
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config DMABUF_HEAPS_CMA
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bool "DMA-BUF CMA Heap"
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depends on DMABUF_HEAPS && DMA_CMA
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help
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Choose this option to enable dma-buf CMA heap. This heap is backed
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by the Contiguous Memory Allocator (CMA). If your system has these
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regions, you should say Y here.
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config DMABUF_HEAPS_CMA_LEGACY
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bool "Legacy DMA-BUF CMA Heap"
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default y
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depends on DMABUF_HEAPS_CMA
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help
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Add a duplicate CMA-backed dma-buf heap with legacy naming derived
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from the CMA area's devicetree node, or "reserved" if the area is not
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defined in the devicetree. This uses the same underlying allocator as
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CONFIG_DMABUF_HEAPS_CMA.
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