From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> We map kernel pages into all addresses space, so they can be marked as global. This allows hardware to avoid flushing the kernel mappings when moving between address spaces. Signed-off-by: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> Reviewed-by: Anup Patel <anup@xxxxxxxxxxxxxx> Reviewed-by: Christoph Hellwig <hch@xxxxxx> Cc: Palmer Dabbelt <palmerdabbelt@xxxxxxxxxx> --- arch/riscv/include/asm/pgtable.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 9469f46..346a3c6 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -134,7 +134,8 @@ | _PAGE_WRITE \ | _PAGE_PRESENT \ | _PAGE_ACCESSED \ - | _PAGE_DIRTY) + | _PAGE_DIRTY \ + | _PAGE_GLOBAL) #define PAGE_KERNEL __pgprot(_PAGE_KERNEL) #define PAGE_KERNEL_READ __pgprot(_PAGE_KERNEL & ~_PAGE_WRITE) -- 2.7.4
