On Wed, Apr 24, 2019 at 1:21 PM damon <[email protected]> wrote:
>
> Use the number of addresses to define the relevant macros.
>
> Signed-off-by: damon <[email protected]>
> ---
> arch/riscv/include/asm/pgtable-32.h | 2 ++
> arch/riscv/include/asm/pgtable-64.h | 3 ++-
> arch/riscv/include/asm/pgtable.h | 8 ++++++--
> 3 files changed, 10 insertions(+), 3 deletions(-)
>
> diff --git a/arch/riscv/include/asm/pgtable-32.h
> b/arch/riscv/include/asm/pgtable-32.h
> index d61974b7..433886b 100644
> --- a/arch/riscv/include/asm/pgtable-32.h
> +++ b/arch/riscv/include/asm/pgtable-32.h
> @@ -17,6 +17,8 @@
> #include <asm-generic/pgtable-nopmd.h>
> #include <linux/const.h>
>
> +#define __PAGETABLE_PMD_FOLDED 1
The __PAGETABLE_PMD_FOLDED is already defined in
asm-generic/pgtable-nopmd.h so we don't need to define it here.
> +#define MAX_USER_VA_BITS 32
> /* Size of region mapped by a page global directory */
> #define PGDIR_SHIFT 22
> #define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT)
> diff --git a/arch/riscv/include/asm/pgtable-64.h
> b/arch/riscv/include/asm/pgtable-64.h
> index 7aa0ea9..a56d4d0 100644
> --- a/arch/riscv/include/asm/pgtable-64.h
> +++ b/arch/riscv/include/asm/pgtable-64.h
> @@ -16,6 +16,7 @@
>
> #include <linux/const.h>
>
> +#define MAX_USER_VA_BITS 39
> #define PGDIR_SHIFT 30
> /* Size of region mapped by a page global directory */
> #define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT)
> @@ -34,7 +35,7 @@
> #define pmd_val(x) ((x).pmd)
> #define __pmd(x) ((pmd_t) { (x) })
>
> -#define PTRS_PER_PMD (PAGE_SIZE / sizeof(pmd_t))
> +#define PTRS_PER_PMD (1 << (PGDIR_SHIFT - PMD_SHIFT))
>
> static inline int pud_present(pud_t pud)
> {
> diff --git a/arch/riscv/include/asm/pgtable.h
> b/arch/riscv/include/asm/pgtable.h
> index 1141364..9148043 100644
> --- a/arch/riscv/include/asm/pgtable.h
> +++ b/arch/riscv/include/asm/pgtable.h
> @@ -33,9 +33,13 @@
> #endif /* CONFIG_64BIT */
>
> /* Number of entries in the page global directory */
> -#define PTRS_PER_PGD (PAGE_SIZE / sizeof(pgd_t))
> +#define PTRS_PER_PGD (1 << (MAX_USER_VA_BITS - PGDIR_SHIFT))
> /* Number of entries in the page table */
> -#define PTRS_PER_PTE (PAGE_SIZE / sizeof(pte_t))
> +#ifdef __PAGETABLE_PMD_FOLDED
> +#define PTRS_PER_PTE (1 << (PGDIR_SHIFT - PAGE_SHIFT))
> +#else
> +#define PTRS_PER_PTE (1 << (PMD_SHIFT - PAGE_SHIFT))
> +#endif
>
> /* Number of PGD entries that a user-mode program can use */
> #define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
> --
> 1.9.1
>
Apart from above, looks good to me.
Reviewed-by: Anup Patel <[email protected]>
Regards,
Anup
