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| author | Michal Simek <michal.simek@xilinx.com> | 2020-01-14 10:05:24 +0100 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2020-02-04 11:38:59 +0100 |
| commit | 2602276d3d3811b1a48c48113042cd75fcbfc27d (patch) | |
| tree | fb0f41091be5c56b4aba8dec76ee7d1d399cd1d5 /arch | |
| parent | def3f7cefe4e81c296090e1722a76551142c227c (diff) | |
| download | linux-2602276d3d3811b1a48c48113042cd75fcbfc27d.tar.bz2 | |
microblaze: Wire CMA allocator
Based on commit 04e3543e228f ("microblaze: use the generic dma coherent
remap allocator")
CMA can be easily enabled by calling dma_contiguous_reserve() at the end of
mmu_init(). High limit is end of lowmem space which is completely unused at
this point of time.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/microblaze/Kconfig | 1 | ||||
| -rw-r--r-- | arch/microblaze/configs/mmu_defconfig | 2 | ||||
| -rw-r--r-- | arch/microblaze/mm/init.c | 4 |
3 files changed, 7 insertions, 0 deletions
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index 5f46ebe7bfe3..e6289294e7fc 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -27,6 +27,7 @@ config MICROBLAZE select HAVE_ARCH_HASH select HAVE_ARCH_KGDB select HAVE_DEBUG_KMEMLEAK + select HAVE_DMA_CONTIGUOUS select HAVE_DYNAMIC_FTRACE select HAVE_FTRACE_MCOUNT_RECORD select HAVE_FUNCTION_GRAPH_TRACER diff --git a/arch/microblaze/configs/mmu_defconfig b/arch/microblaze/configs/mmu_defconfig index dd63766c2d19..9b8a50f30662 100644 --- a/arch/microblaze/configs/mmu_defconfig +++ b/arch/microblaze/configs/mmu_defconfig @@ -26,6 +26,7 @@ CONFIG_MODULE_UNLOAD=y # CONFIG_BLK_DEV_BSG is not set CONFIG_PARTITION_ADVANCED=y # CONFIG_EFI_PARTITION is not set +CONFIG_CMA=y CONFIG_NET=y CONFIG_PACKET=y CONFIG_UNIX=y @@ -82,6 +83,7 @@ CONFIG_NFS_FS=y CONFIG_CIFS=y CONFIG_CIFS_STATS2=y CONFIG_ENCRYPTED_KEYS=y +CONFIG_DMA_CMA=y CONFIG_DEBUG_INFO=y CONFIG_KGDB=y CONFIG_KGDB_TESTS=y diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c index 050fc621c920..1056f1674065 100644 --- a/arch/microblaze/mm/init.c +++ b/arch/microblaze/mm/init.c @@ -7,6 +7,7 @@ * for more details. */ +#include <linux/dma-contiguous.h> #include <linux/memblock.h> #include <linux/init.h> #include <linux/kernel.h> @@ -345,6 +346,9 @@ asmlinkage void __init mmu_init(void) /* This will also cause that unflatten device tree will be allocated * inside 768MB limit */ memblock_set_current_limit(memory_start + lowmem_size - 1); + + /* CMA initialization */ + dma_contiguous_reserve(memory_start + lowmem_size - 1); } /* This is only called until mem_init is done. */ |