Messages in this thread Patch in this message | | | From | Jiuyang Liu <> | Subject | [PATCH] implement flush_cache_vmap for RISC-V | Date | Mon, 12 Apr 2021 00:05:30 +0000 |
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This patch implements flush_cache_vmap for RISC-V, since it modifies PTE. Without this patch, SFENCE.VMA won't be added to related codes, which might introduce a bug in the out-of-order micro-architecture implementations.
Signed-off-by: Jiuyang Liu <liu@jiuyang.me> Reviewed-by: Alexandre Ghiti <alex@ghiti.fr> Reviewed-by: Palmer Dabbelt <palmer@dabbelt.com> --- arch/riscv/include/asm/cacheflush.h | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/arch/riscv/include/asm/cacheflush.h b/arch/riscv/include/asm/cacheflush.h index 23ff70350992..3fd528badc35 100644 --- a/arch/riscv/include/asm/cacheflush.h +++ b/arch/riscv/include/asm/cacheflush.h @@ -30,6 +30,12 @@ static inline void flush_dcache_page(struct page *page) #define flush_icache_user_page(vma, pg, addr, len) \ flush_icache_mm(vma->vm_mm, 0) +/* + * flush_cache_vmap is invoked after map_kernel_range() has installed the page + * table entries, which modifies PTE, SFENCE.VMA should be inserted. + */ +#define flush_cache_vmap(start, end) flush_tlb_all() + #ifndef CONFIG_SMP #define flush_icache_all() local_flush_icache_all() -- 2.31.1
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