diff options
Diffstat (limited to 'arch/riscv/include/asm/pgtable-64.h')
| -rw-r--r-- | arch/riscv/include/asm/pgtable-64.h | 79 |
1 files changed, 75 insertions, 4 deletions
diff --git a/arch/riscv/include/asm/pgtable-64.h b/arch/riscv/include/asm/pgtable-64.h index 7e246e9f8d70..e4ff3e0ab887 100644 --- a/arch/riscv/include/asm/pgtable-64.h +++ b/arch/riscv/include/asm/pgtable-64.h @@ -6,7 +6,9 @@ #ifndef _ASM_RISCV_PGTABLE_64_H #define _ASM_RISCV_PGTABLE_64_H +#include <linux/bits.h> #include <linux/const.h> +#include <asm/errata_list.h> extern bool pgtable_l4_enabled; extern bool pgtable_l5_enabled; @@ -65,6 +67,71 @@ typedef struct { #define PTRS_PER_PMD (PAGE_SIZE / sizeof(pmd_t)) +/* + * rv64 PTE format: + * | 63 | 62 61 | 60 54 | 53 10 | 9 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 + * N MT RSV PFN reserved for SW D A G U X W R V + */ +#define _PAGE_PFN_MASK GENMASK(53, 10) + +/* + * [62:61] Svpbmt Memory Type definitions: + * + * 00 - PMA Normal Cacheable, No change to implied PMA memory type + * 01 - NC Non-cacheable, idempotent, weakly-ordered Main Memory + * 10 - IO Non-cacheable, non-idempotent, strongly-ordered I/O memory + * 11 - Rsvd Reserved for future standard use + */ +#define _PAGE_NOCACHE_SVPBMT (1UL << 61) +#define _PAGE_IO_SVPBMT (1UL << 62) +#define _PAGE_MTMASK_SVPBMT (_PAGE_NOCACHE_SVPBMT | _PAGE_IO_SVPBMT) + +/* + * [63:59] T-Head Memory Type definitions: + * + * 00000 - NC Weakly-ordered, Non-cacheable, Non-bufferable, Non-shareable, Non-trustable + * 01110 - PMA Weakly-ordered, Cacheable, Bufferable, Shareable, Non-trustable + * 10000 - IO Strongly-ordered, Non-cacheable, Non-bufferable, Non-shareable, Non-trustable + */ +#define _PAGE_PMA_THEAD ((1UL << 62) | (1UL << 61) | (1UL << 60)) +#define _PAGE_NOCACHE_THEAD 0UL +#define _PAGE_IO_THEAD (1UL << 63) +#define _PAGE_MTMASK_THEAD (_PAGE_PMA_THEAD | _PAGE_IO_THEAD | (1UL << 59)) + +static inline u64 riscv_page_mtmask(void) +{ + u64 val; + + ALT_SVPBMT(val, _PAGE_MTMASK); + return val; +} + +static inline u64 riscv_page_nocache(void) +{ + u64 val; + + ALT_SVPBMT(val, _PAGE_NOCACHE); + return val; +} + +static inline u64 riscv_page_io(void) +{ + u64 val; + + ALT_SVPBMT(val, _PAGE_IO); + return val; +} + +#define _PAGE_NOCACHE riscv_page_nocache() +#define _PAGE_IO riscv_page_io() +#define _PAGE_MTMASK riscv_page_mtmask() + +/* Set of bits to preserve across pte_modify() */ +#define _PAGE_CHG_MASK (~(unsigned long)(_PAGE_PRESENT | _PAGE_READ | \ + _PAGE_WRITE | _PAGE_EXEC | \ + _PAGE_USER | _PAGE_GLOBAL | \ + _PAGE_MTMASK)) + static inline int pud_present(pud_t pud) { return (pud_val(pud) & _PAGE_PRESENT); @@ -108,12 +175,12 @@ static inline unsigned long _pud_pfn(pud_t pud) static inline pmd_t *pud_pgtable(pud_t pud) { - return (pmd_t *)pfn_to_virt(pud_val(pud) >> _PAGE_PFN_SHIFT); + return (pmd_t *)pfn_to_virt(__page_val_to_pfn(pud_val(pud))); } static inline struct page *pud_page(pud_t pud) { - return pfn_to_page(pud_val(pud) >> _PAGE_PFN_SHIFT); + return pfn_to_page(__page_val_to_pfn(pud_val(pud))); } #define mm_p4d_folded mm_p4d_folded @@ -138,12 +205,16 @@ static inline bool mm_pud_folded(struct mm_struct *mm) static inline pmd_t pfn_pmd(unsigned long pfn, pgprot_t prot) { - return __pmd((pfn << _PAGE_PFN_SHIFT) | pgprot_val(prot)); + unsigned long prot_val = pgprot_val(prot); + + ALT_THEAD_PMA(prot_val); + + return __pmd((pfn << _PAGE_PFN_SHIFT) | prot_val); } static inline unsigned long _pmd_pfn(pmd_t pmd) { - return pmd_val(pmd) >> _PAGE_PFN_SHIFT; + return __page_val_to_pfn(pmd_val(pmd)); } #define mk_pmd(page, prot) pfn_pmd(page_to_pfn(page), prot) |