* [PATCH v3] riscv: Add support to allocate gigantic hugepages using CMA
@ 2021-07-30 12:48 Kefeng Wang
2021-08-14 5:00 ` Palmer Dabbelt
0 siblings, 1 reply; 2+ messages in thread
From: Kefeng Wang @ 2021-07-30 12:48 UTC (permalink / raw)
To: Palmer Dabbelt, linux-riscv
Cc: palmerdabbelt, paul.walmsley, aou, Kefeng Wang, Alexandre Ghiti
Commit 9e953cda5cdf ("riscv: Introduce huge page support for32/64bit
kernel") adds support gigantic hugepage support for RV64.
This patch adds support to allocate gigantic hugepages using CMA by
specifying the hugetlb_cma= kernel parameter on RV64.
Cc: Alexandre Ghiti <alex@ghiti.fr>
Reviewed-by: Alexandre Ghiti <alex@ghiti.fr>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
v3: Update changelog and add Reviewed-by.
arch/riscv/mm/init.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index a14bf3910eec..e547e53cddd2 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>
@@ -216,6 +217,8 @@ 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();
}
--
2.26.2
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^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v3] riscv: Add support to allocate gigantic hugepages using CMA
2021-07-30 12:48 [PATCH v3] riscv: Add support to allocate gigantic hugepages using CMA Kefeng Wang
@ 2021-08-14 5:00 ` Palmer Dabbelt
0 siblings, 0 replies; 2+ messages in thread
From: Palmer Dabbelt @ 2021-08-14 5:00 UTC (permalink / raw)
To: wangkefeng.wang; +Cc: linux-riscv, Paul Walmsley, aou, wangkefeng.wang, alex
On Fri, 30 Jul 2021 05:48:41 PDT (-0700), wangkefeng.wang@huawei.com wrote:
> Commit 9e953cda5cdf ("riscv: Introduce huge page support for32/64bit
> kernel") adds support gigantic hugepage support for RV64.
>
> This patch adds support to allocate gigantic hugepages using CMA by
> specifying the hugetlb_cma= kernel parameter on RV64.
>
> Cc: Alexandre Ghiti <alex@ghiti.fr>
> Reviewed-by: Alexandre Ghiti <alex@ghiti.fr>
> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
> ---
> v3: Update changelog and add Reviewed-by.
> arch/riscv/mm/init.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
> index a14bf3910eec..e547e53cddd2 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>
> @@ -216,6 +217,8 @@ 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();
> }
Thanks. This is on for-next. I cleaned up the commit text a bit.
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2021-08-14 5:00 ` Palmer Dabbelt
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