diff options
Diffstat (limited to 'arch/s390/include/asm/pgtable.h')
| -rw-r--r-- | arch/s390/include/asm/pgtable.h | 186 |
1 files changed, 116 insertions, 70 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 4a2930844d43..ac01463038f1 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -57,6 +57,10 @@ extern unsigned long zero_page_mask; (((unsigned long)(vaddr)) &zero_page_mask)))) #define __HAVE_COLOR_ZERO_PAGE +/* TODO: s390 cannot support io_remap_pfn_range... */ +#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ + remap_pfn_range(vma, vaddr, pfn, size, prot) + #endif /* !__ASSEMBLY__ */ /* @@ -302,6 +306,7 @@ extern unsigned long MODULES_END; #define RCP_HC_BIT 0x00200000UL #define RCP_GR_BIT 0x00040000UL #define RCP_GC_BIT 0x00020000UL +#define RCP_IN_BIT 0x00002000UL /* IPTE notify bit */ /* User dirty / referenced bit for KVM's migration feature */ #define KVM_UR_BIT 0x00008000UL @@ -344,6 +349,7 @@ extern unsigned long MODULES_END; #define _REGION3_ENTRY_CO 0x100 /* change-recording override */ /* Bits in the segment table entry */ +#define _SEGMENT_ENTRY_ORIGIN_LARGE ~0xfffffUL /* large page address */ #define _SEGMENT_ENTRY_ORIGIN ~0x7ffUL/* segment table origin */ #define _SEGMENT_ENTRY_RO 0x200 /* page protection bit */ #define _SEGMENT_ENTRY_INV 0x20 /* invalid segment table entry */ @@ -368,6 +374,7 @@ extern unsigned long MODULES_END; #define RCP_HC_BIT 0x0020000000000000UL #define RCP_GR_BIT 0x0004000000000000UL #define RCP_GC_BIT 0x0002000000000000UL +#define RCP_IN_BIT 0x0000200000000000UL /* IPTE notify bit */ /* User dirty / referenced bit for KVM's migration feature */ #define KVM_UR_BIT 0x0000800000000000UL @@ -419,6 +426,13 @@ extern unsigned long MODULES_END; #define __S110 PAGE_RW #define __S111 PAGE_RW +/* + * Segment entry (large page) protection definitions. + */ +#define SEGMENT_NONE __pgprot(_HPAGE_TYPE_NONE) +#define SEGMENT_RO __pgprot(_HPAGE_TYPE_RO) +#define SEGMENT_RW __pgprot(_HPAGE_TYPE_RW) + static inline int mm_exclusive(struct mm_struct *mm) { return likely(mm == current->active_mm && @@ -632,7 +646,7 @@ static inline pgste_t pgste_update_all(pte_t *ptep, pgste_t pgste) unsigned long address, bits; unsigned char skey; - if (!pte_present(*ptep)) + if (pte_val(*ptep) & _PAGE_INVALID) return pgste; address = pte_val(*ptep) & PAGE_MASK; skey = page_get_storage_key(address); @@ -666,7 +680,7 @@ static inline pgste_t pgste_update_young(pte_t *ptep, pgste_t pgste) #ifdef CONFIG_PGSTE int young; - if (!pte_present(*ptep)) + if (pte_val(*ptep) & _PAGE_INVALID) return pgste; /* Get referenced bit from storage key */ young = page_reset_referenced(pte_val(*ptep) & PAGE_MASK); @@ -692,7 +706,7 @@ static inline void pgste_set_key(pte_t *ptep, pgste_t pgste, pte_t entry) unsigned long address; unsigned long okey, nkey; - if (!pte_present(entry)) + if (pte_val(entry) & _PAGE_INVALID) return; address = pte_val(entry) & PAGE_MASK; okey = nkey = page_get_storage_key(address); @@ -734,35 +748,67 @@ struct gmap { /** * struct gmap_rmap - reverse mapping for segment table entries - * @next: pointer to the next gmap_rmap structure in the list + * @gmap: pointer to the gmap_struct * @entry: pointer to a segment table entry + * @vmaddr: virtual address in the guest address space */ struct gmap_rmap { struct list_head list; + struct gmap *gmap; unsigned long *entry; + unsigned long vmaddr; }; /** * struct gmap_pgtable - gmap information attached to a page table * @vmaddr: address of the 1MB segment in the process virtual memory - * @mapper: list of segment table entries maping a page table + * @mapper: list of segment table entries mapping a page table */ struct gmap_pgtable { unsigned long vmaddr; struct list_head mapper; }; +/** + * struct gmap_notifier - notify function block for page invalidation + * @notifier_call: address of callback function + */ +struct gmap_notifier { + struct list_head list; + void (*notifier_call)(struct gmap *gmap, unsigned long address); +}; + struct gmap *gmap_alloc(struct mm_struct *mm); void gmap_free(struct gmap *gmap); void gmap_enable(struct gmap *gmap); void gmap_disable(struct gmap *gmap); int gmap_map_segment(struct gmap *gmap, unsigned long from, - unsigned long to, unsigned long length); + unsigned long to, unsigned long len); int gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len); +unsigned long __gmap_translate(unsigned long address, struct gmap *); +unsigned long gmap_translate(unsigned long address, struct gmap *); unsigned long __gmap_fault(unsigned long address, struct gmap *); unsigned long gmap_fault(unsigned long address, struct gmap *); void gmap_discard(unsigned long from, unsigned long to, struct gmap *); +void gmap_register_ipte_notifier(struct gmap_notifier *); +void gmap_unregister_ipte_notifier(struct gmap_notifier *); +int gmap_ipte_notify(struct gmap *, unsigned long start, unsigned long len); +void gmap_do_ipte_notify(struct mm_struct *, unsigned long addr, pte_t *); + +static inline pgste_t pgste_ipte_notify(struct mm_struct *mm, + unsigned long addr, + pte_t *ptep, pgste_t pgste) +{ +#ifdef CONFIG_PGSTE + if (pgste_val(pgste) & RCP_IN_BIT) { + pgste_val(pgste) &= ~RCP_IN_BIT; + gmap_do_ipte_notify(mm, addr, ptep); + } +#endif + return pgste; +} + /* * Certain architectures need to do special things when PTEs * within a page table are directly modified. Thus, the following @@ -907,26 +953,6 @@ static inline pte_t pte_mkspecial(pte_t pte) #ifdef CONFIG_HUGETLB_PAGE static inline pte_t pte_mkhuge(pte_t pte) { - /* - * PROT_NONE needs to be remapped from the pte type to the ste type. - * The HW invalid bit is also different for pte and ste. The pte - * invalid bit happens to be the same as the ste _SEGMENT_ENTRY_LARGE - * bit, so we don't have to clear it. - */ - if (pte_val(pte) & _PAGE_INVALID) { - if (pte_val(pte) & _PAGE_SWT) - pte_val(pte) |= _HPAGE_TYPE_NONE; - pte_val(pte) |= _SEGMENT_ENTRY_INV; - } - /* - * Clear SW pte bits, there are no SW bits in a segment table entry. - */ - pte_val(pte) &= ~(_PAGE_SWT | _PAGE_SWX | _PAGE_SWC | - _PAGE_SWR | _PAGE_SWW); - /* - * Also set the change-override bit because we don't need dirty bit - * tracking for hugetlbfs pages. - */ pte_val(pte) |= (_SEGMENT_ENTRY_LARGE | _SEGMENT_ENTRY_CO); return pte; } @@ -1038,8 +1064,10 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, pte_t pte; mm->context.flush_mm = 1; - if (mm_has_pgste(mm)) + if (mm_has_pgste(mm)) { pgste = pgste_get_lock(ptep); + pgste = pgste_ipte_notify(mm, address, ptep, pgste); + } pte = *ptep; if (!mm_exclusive(mm)) @@ -1058,15 +1086,21 @@ static inline pte_t ptep_modify_prot_start(struct mm_struct *mm, unsigned long address, pte_t *ptep) { + pgste_t pgste; pte_t pte; mm->context.flush_mm = 1; - if (mm_has_pgste(mm)) - pgste_get_lock(ptep); + if (mm_has_pgste(mm)) { + pgste = pgste_get_lock(ptep); + pgste_ipte_notify(mm, address, ptep, pgste); + } pte = *ptep; if (!mm_exclusive(mm)) __ptep_ipte(address, ptep); + + if (mm_has_pgste(mm)) + pgste = pgste_update_all(&pte, pgste); return pte; } @@ -1074,9 +1108,13 @@ static inline void ptep_modify_prot_commit(struct mm_struct *mm, unsigned long address, pte_t *ptep, pte_t pte) { + pgste_t pgste; + if (mm_has_pgste(mm)) { + pgste = *(pgste_t *)(ptep + PTRS_PER_PTE); + pgste_set_key(ptep, pgste, pte); pgste_set_pte(ptep, pte); - pgste_set_unlock(ptep, *(pgste_t *)(ptep + PTRS_PER_PTE)); + pgste_set_unlock(ptep, pgste); } else *ptep = pte; } @@ -1088,8 +1126,10 @@ static inline pte_t ptep_clear_flush(struct vm_area_struct *vma, pgste_t pgste; pte_t pte; - if (mm_has_pgste(vma->vm_mm)) + if (mm_has_pgste(vma->vm_mm)) { pgste = pgste_get_lock(ptep); + pgste = pgste_ipte_notify(vma->vm_mm, address, ptep, pgste); + } pte = *ptep; __ptep_ipte(address, ptep); @@ -1117,8 +1157,11 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, pgste_t pgste; pte_t pte; - if (mm_has_pgste(mm)) + if (mm_has_pgste(mm)) { pgste = pgste_get_lock(ptep); + if (!full) + pgste = pgste_ipte_notify(mm, address, ptep, pgste); + } pte = *ptep; if (!full) @@ -1141,8 +1184,10 @@ static inline pte_t ptep_set_wrprotect(struct mm_struct *mm, if (pte_write(pte)) { mm->context.flush_mm = 1; - if (mm_has_pgste(mm)) + if (mm_has_pgste(mm)) { pgste = pgste_get_lock(ptep); + pgste = pgste_ipte_notify(mm, address, ptep, pgste); + } if (!mm_exclusive(mm)) __ptep_ipte(address, ptep); @@ -1166,8 +1211,10 @@ static inline int ptep_set_access_flags(struct vm_area_struct *vma, if (pte_same(*ptep, entry)) return 0; - if (mm_has_pgste(vma->vm_mm)) + if (mm_has_pgste(vma->vm_mm)) { pgste = pgste_get_lock(ptep); + pgste = pgste_ipte_notify(vma->vm_mm, address, ptep, pgste); + } __ptep_ipte(address, ptep); @@ -1271,31 +1318,7 @@ static inline void __pmd_idte(unsigned long address, pmd_t *pmdp) } } -#ifdef CONFIG_TRANSPARENT_HUGEPAGE - -#define SEGMENT_NONE __pgprot(_HPAGE_TYPE_NONE) -#define SEGMENT_RO __pgprot(_HPAGE_TYPE_RO) -#define SEGMENT_RW __pgprot(_HPAGE_TYPE_RW) - -#define __HAVE_ARCH_PGTABLE_DEPOSIT -extern void pgtable_trans_huge_deposit(struct mm_struct *mm, pgtable_t pgtable); - -#define __HAVE_ARCH_PGTABLE_WITHDRAW -extern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm); - -static inline int pmd_trans_splitting(pmd_t pmd) -{ - return pmd_val(pmd) & _SEGMENT_ENTRY_SPLIT; -} - -static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr, - pmd_t *pmdp, pmd_t entry) -{ - if (!(pmd_val(entry) & _SEGMENT_ENTRY_INV) && MACHINE_HAS_EDAT1) - pmd_val(entry) |= _SEGMENT_ENTRY_CO; - *pmdp = entry; -} - +#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLB_PAGE) static inline unsigned long massage_pgprot_pmd(pgprot_t pgprot) { /* @@ -1316,10 +1339,11 @@ static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) return pmd; } -static inline pmd_t pmd_mkhuge(pmd_t pmd) +static inline pmd_t mk_pmd_phys(unsigned long physpage, pgprot_t pgprot) { - pmd_val(pmd) |= _SEGMENT_ENTRY_LARGE; - return pmd; + pmd_t __pmd; + pmd_val(__pmd) = physpage + massage_pgprot_pmd(pgprot); + return __pmd; } static inline pmd_t pmd_mkwrite(pmd_t pmd) @@ -1329,6 +1353,34 @@ static inline pmd_t pmd_mkwrite(pmd_t pmd) pmd_val(pmd) &= ~_SEGMENT_ENTRY_RO; return pmd; } +#endif /* CONFIG_TRANSPARENT_HUGEPAGE || CONFIG_HUGETLB_PAGE */ + +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + +#define __HAVE_ARCH_PGTABLE_DEPOSIT +extern void pgtable_trans_huge_deposit(struct mm_struct *mm, pgtable_t pgtable); + +#define __HAVE_ARCH_PGTABLE_WITHDRAW +extern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm); + +static inline int pmd_trans_splitting(pmd_t pmd) +{ + return pmd_val(pmd) & _SEGMENT_ENTRY_SPLIT; +} + +static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr, + pmd_t *pmdp, pmd_t entry) +{ + if (!(pmd_val(entry) & _SEGMENT_ENTRY_INV) && MACHINE_HAS_EDAT1) + pmd_val(entry) |= _SEGMENT_ENTRY_CO; + *pmdp = entry; +} + +static inline pmd_t pmd_mkhuge(pmd_t pmd) +{ + pmd_val(pmd) |= _SEGMENT_ENTRY_LARGE; + return pmd; +} static inline pmd_t pmd_wrprotect(pmd_t pmd) { @@ -1425,13 +1477,6 @@ static inline void pmdp_set_wrprotect(struct mm_struct *mm, } } -static inline pmd_t mk_pmd_phys(unsigned long physpage, pgprot_t pgprot) -{ - pmd_t __pmd; - pmd_val(__pmd) = physpage + massage_pgprot_pmd(pgprot); - return __pmd; -} - #define pfn_pmd(pfn, pgprot) mk_pmd_phys(__pa((pfn) << PAGE_SHIFT), (pgprot)) #define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot)) @@ -1531,7 +1576,8 @@ extern int s390_enable_sie(void); /* * No page table caches to initialise */ -#define pgtable_cache_init() do { } while (0) +static inline void pgtable_cache_init(void) { } +static inline void check_pgt_cache(void) { } #include <asm-generic/pgtable.h> |