diff options
Diffstat (limited to 'arch/riscv/include')
| -rw-r--r-- | arch/riscv/include/asm/pgtable.h | 19 | ||||
| -rw-r--r-- | arch/riscv/include/asm/set_memory.h | 1 | ||||
| -rw-r--r-- | arch/riscv/include/asm/text-patching.h (renamed from arch/riscv/include/asm/patch.h) | 0 | ||||
| -rw-r--r-- | arch/riscv/include/asm/uprobes.h | 2 |
4 files changed, 21 insertions, 1 deletions
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index e79f15293492..5d7f3e8c2e50 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -963,6 +963,25 @@ void misc_mem_init(void); extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) +/* + * Use set_p*_safe(), and elide TLB flushing, when confident that *no* + * TLB flush will be required as a result of the "set". For example, use + * in scenarios where it is known ahead of time that the routine is + * setting non-present entries, or re-setting an existing entry to the + * same value. Otherwise, use the typical "set" helpers and flush the + * TLB. + */ +#define set_p4d_safe(p4dp, p4d) \ +({ \ + WARN_ON_ONCE(p4d_present(*p4dp) && !p4d_same(*p4dp, p4d)); \ + set_p4d(p4dp, p4d); \ +}) + +#define set_pgd_safe(pgdp, pgd) \ +({ \ + WARN_ON_ONCE(pgd_present(*pgdp) && !pgd_same(*pgdp, pgd)); \ + set_pgd(pgdp, pgd); \ +}) #endif /* !__ASSEMBLY__ */ #endif /* _ASM_RISCV_PGTABLE_H */ diff --git a/arch/riscv/include/asm/set_memory.h b/arch/riscv/include/asm/set_memory.h index ab92fc84e1fc..ea263d3683ef 100644 --- a/arch/riscv/include/asm/set_memory.h +++ b/arch/riscv/include/asm/set_memory.h @@ -42,6 +42,7 @@ static inline int set_kernel_memory(char *startp, char *endp, int set_direct_map_invalid_noflush(struct page *page); int set_direct_map_default_noflush(struct page *page); +int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid); bool kernel_page_present(struct page *page); #endif /* __ASSEMBLY__ */ diff --git a/arch/riscv/include/asm/patch.h b/arch/riscv/include/asm/text-patching.h index 7228e266b9a1..7228e266b9a1 100644 --- a/arch/riscv/include/asm/patch.h +++ b/arch/riscv/include/asm/text-patching.h diff --git a/arch/riscv/include/asm/uprobes.h b/arch/riscv/include/asm/uprobes.h index 3fc7deda9190..5008f76cdc27 100644 --- a/arch/riscv/include/asm/uprobes.h +++ b/arch/riscv/include/asm/uprobes.h @@ -4,7 +4,7 @@ #define _ASM_RISCV_UPROBES_H #include <asm/probes.h> -#include <asm/patch.h> +#include <asm/text-patching.h> #include <asm/bug.h> #define MAX_UINSN_BYTES 8 |