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Arnd BergmannandSumit Semwal
f7606400f1
While system heap and system_cc_shared heap share a lot of code
and hence the same source file, their users have different needs.
system heap users need it to be a loadable module, while
system_cc_shared heap users don't.
Building as a loadable module breaks system_cc_shared heap on
powerpc and s390 due to un-exported set_memory_encrypted /
set_memory_decrypted functions.
Fix these by reorganising code to put the system_cc_shared heap
under a new Kconfig symbol, which allows either building both
into the kernel, or leave encryption up to the consumers of the
system heap.
Fixes: fd55edff8a ("dma-buf: heaps: system: Turn the heap into a module")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
[sumits: updated DMABUF_HEAPS_CC_SYSTEM to DMABUF_HEAPS_SYSTEM_CC_SHARED]
Reviewed-by: T.J. Mercier <tjmercier@google.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://patch.msgid.link/20260610142329.3836808-1-sumit.semwal@linaro.org
23 lines
830 B
Plaintext
23 lines
830 B
Plaintext
config DMABUF_HEAPS_SYSTEM
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tristate "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_SYSTEM_CC_SHARED
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bool "DMA-BUF System Heap for decrypted CoCo VMs"
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depends on DMABUF_HEAPS && ARCH_HAS_MEM_ENCRYPT && DMABUF_HEAPS_SYSTEM=y
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help
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Choose this option to enable the system_cc_shared dmabuf heap. This
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allows allocating shared (decrypted) memory for confidential computing
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(CoCo) VMs.
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config DMABUF_HEAPS_CMA
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tristate "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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