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| author | Kefeng Wang <wangkefeng.wang@huawei.com> | 2021-07-30 20:48:41 +0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2021-08-13 21:33:54 -0700 |
| commit | 8ba1a8b77ba1eb3aef441ed2caf28ab2b1261f5f (patch) | |
| tree | 5a6d9c34e704f2af9542ad72f0292b2ded901859 /arch/riscv/mm/init.c | |
| parent | fb31f0a499332a053477ed57312b214e42476e6d (diff) | |
| download | lwn-8ba1a8b77ba1eb3aef441ed2caf28ab2b1261f5f.tar.gz lwn-8ba1a8b77ba1eb3aef441ed2caf28ab2b1261f5f.zip | |
riscv: Support allocating gigantic hugepages using CMA
This patch adds support to allocate gigantic hugepages using CMA by
specifying the hugetlb_cma= kernel parameter. This is only supported on
RV64.
Reviewed-by: Alexandre Ghiti <alex@ghiti.fr>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/mm/init.c')
| -rw-r--r-- | arch/riscv/mm/init.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index 888dff9530b8..248f9ec393c1 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -19,6 +19,7 @@ #include <linux/set_memory.h> #include <linux/dma-map-ops.h> #include <linux/crash_dump.h> +#include <linux/hugetlb.h> #include <asm/fixmap.h> #include <asm/tlbflush.h> @@ -202,6 +203,8 @@ static void __init setup_bootmem(void) early_init_fdt_scan_reserved_mem(); dma_contiguous_reserve(dma32_phys_limit); + if (IS_ENABLED(CONFIG_64BIT)) + hugetlb_cma_reserve(PUD_SHIFT - PAGE_SHIFT); memblock_allow_resize(); } |