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-rw-r--r--arch/s390/lib/uaccess_pt.c7
-rw-r--r--arch/s390/mm/init.c4
-rw-r--r--arch/s390/mm/vmem.c34
-rw-r--r--include/asm-s390/page.h4
-rw-r--r--include/asm-s390/pgalloc.h32
-rw-r--r--include/asm-s390/pgtable.h123
-rw-r--r--include/asm-s390/tlb.h2
7 files changed, 127 insertions, 79 deletions
diff --git a/arch/s390/lib/uaccess_pt.c b/arch/s390/lib/uaccess_pt.c
index dc37ea827f4..7e8efaade2e 100644
--- a/arch/s390/lib/uaccess_pt.c
+++ b/arch/s390/lib/uaccess_pt.c
@@ -18,13 +18,18 @@
static inline pte_t *follow_table(struct mm_struct *mm, unsigned long addr)
{
pgd_t *pgd;
+ pud_t *pud;
pmd_t *pmd;
pgd = pgd_offset(mm, addr);
if (pgd_none(*pgd) || unlikely(pgd_bad(*pgd)))
return NULL;
- pmd = pmd_offset(pgd, addr);
+ pud = pud_offset(pgd, addr);
+ if (pud_none(*pud) || unlikely(pud_bad(*pud)))
+ return NULL;
+
+ pmd = pmd_offset(pud, addr);
if (pmd_none(*pmd) || unlikely(pmd_bad(*pmd)))
return NULL;
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 90ec058aa7d..b234bb4a6da 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -81,6 +81,7 @@ void show_mem(void)
static void __init setup_ro_region(void)
{
pgd_t *pgd;
+ pud_t *pud;
pmd_t *pmd;
pte_t *pte;
pte_t new_pte;
@@ -91,7 +92,8 @@ static void __init setup_ro_region(void)
for (; address < end; address += PAGE_SIZE) {
pgd = pgd_offset_k(address);
- pmd = pmd_offset(pgd, address);
+ pud = pud_offset(pgd, address);
+ pmd = pmd_offset(pud, address);
pte = pte_offset_kernel(pmd, address);
new_pte = mk_pte_phys(address, __pgprot(_PAGE_RO));
*pte = new_pte;
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index 1bd51d84048..fb9c5a85aa5 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -73,6 +73,8 @@ static void __init_refok *vmem_alloc_pages(unsigned int order)
return alloc_bootmem_pages((1 << order) * PAGE_SIZE);
}
+#define vmem_pud_alloc() ({ BUG(); ((pud_t *) NULL); })
+
static inline pmd_t *vmem_pmd_alloc(void)
{
pmd_t *pmd = NULL;
@@ -103,6 +105,7 @@ static int vmem_add_range(unsigned long start, unsigned long size)
{
unsigned long address;
pgd_t *pg_dir;
+ pud_t *pu_dir;
pmd_t *pm_dir;
pte_t *pt_dir;
pte_t pte;
@@ -111,13 +114,21 @@ static int vmem_add_range(unsigned long start, unsigned long size)
for (address = start; address < start + size; address += PAGE_SIZE) {
pg_dir = pgd_offset_k(address);
if (pgd_none(*pg_dir)) {
+ pu_dir = vmem_pud_alloc();
+ if (!pu_dir)
+ goto out;
+ pgd_populate_kernel(&init_mm, pg_dir, pu_dir);
+ }
+
+ pu_dir = pud_offset(pg_dir, address);
+ if (pud_none(*pu_dir)) {
pm_dir = vmem_pmd_alloc();
if (!pm_dir)
goto out;
- pgd_populate_kernel(&init_mm, pg_dir, pm_dir);
+ pud_populate_kernel(&init_mm, pu_dir, pm_dir);
}
- pm_dir = pmd_offset(pg_dir, address);
+ pm_dir = pmd_offset(pu_dir, address);
if (pmd_none(*pm_dir)) {
pt_dir = vmem_pte_alloc();
if (!pt_dir)
@@ -143,6 +154,7 @@ static void vmem_remove_range(unsigned long start, unsigned long size)
{
unsigned long address;
pgd_t *pg_dir;
+ pud_t *pu_dir;
pmd_t *pm_dir;
pte_t *pt_dir;
pte_t pte;
@@ -150,9 +162,10 @@ static void vmem_remove_range(unsigned long start, unsigned long size)
pte_val(pte) = _PAGE_TYPE_EMPTY;
for (address = start; address < start + size; address += PAGE_SIZE) {
pg_dir = pgd_offset_k(address);
- if (pgd_none(*pg_dir))
+ pu_dir = pud_offset(pg_dir, address);
+ if (pud_none(*pu_dir))
continue;
- pm_dir = pmd_offset(pg_dir, address);
+ pm_dir = pmd_offset(pu_dir, address);
if (pmd_none(*pm_dir))
continue;
pt_dir = pte_offset_kernel(pm_dir, address);
@@ -169,6 +182,7 @@ static int vmem_add_mem_map(unsigned long start, unsigned long size)
unsigned long address, start_addr, end_addr;
struct page *map_start, *map_end;
pgd_t *pg_dir;
+ pud_t *pu_dir;
pmd_t *pm_dir;
pte_t *pt_dir;
pte_t pte;
@@ -183,13 +197,21 @@ static int vmem_add_mem_map(unsigned long start, unsigned long size)
for (address = start_addr; address < end_addr; address += PAGE_SIZE) {
pg_dir = pgd_offset_k(address);
if (pgd_none(*pg_dir)) {
+ pu_dir = vmem_pud_alloc();
+ if (!pu_dir)
+ goto out;
+ pgd_populate_kernel(&init_mm, pg_dir, pu_dir);
+ }
+
+ pu_dir = pud_offset(pg_dir, address);
+ if (pud_none(*pu_dir)) {
pm_dir = vmem_pmd_alloc();
if (!pm_dir)
goto out;
- pgd_populate_kernel(&init_mm, pg_dir, pm_dir);
+ pud_populate_kernel(&init_mm, pu_dir, pm_dir);
}
- pm_dir = pmd_offset(pg_dir, address);
+ pm_dir = pmd_offset(pu_dir, address);
if (pmd_none(*pm_dir)) {
pt_dir = vmem_pte_alloc();
if (!pt_dir)
diff --git a/include/asm-s390/page.h b/include/asm-s390/page.h
index ceec3826a67..584d0ee3c7f 100644
--- a/include/asm-s390/page.h
+++ b/include/asm-s390/page.h
@@ -82,6 +82,7 @@ typedef struct { unsigned long pte; } pte_t;
#ifndef __s390x__
typedef struct { unsigned long pmd; } pmd_t;
+typedef struct { unsigned long pud; } pud_t;
typedef struct {
unsigned long pgd0;
unsigned long pgd1;
@@ -90,6 +91,7 @@ typedef struct {
} pgd_t;
#define pmd_val(x) ((x).pmd)
+#define pud_val(x) ((x).pud)
#define pgd_val(x) ((x).pgd0)
#else /* __s390x__ */
@@ -98,10 +100,12 @@ typedef struct {
unsigned long pmd0;
unsigned long pmd1;
} pmd_t;
+typedef struct { unsigned long pud; } pud_t;
typedef struct { unsigned long pgd; } pgd_t;
#define pmd_val(x) ((x).pmd0)
#define pmd_val1(x) ((x).pmd1)
+#define pud_val(x) ((x).pud)
#define pgd_val(x) ((x).pgd)
#endif /* __s390x__ */
diff --git a/include/asm-s390/pgalloc.h b/include/asm-s390/pgalloc.h
index 229b0bd5933..709dd174095 100644
--- a/include/asm-s390/pgalloc.h
+++ b/include/asm-s390/pgalloc.h
@@ -56,11 +56,17 @@ static inline unsigned long pgd_entry_type(struct mm_struct *mm)
return _SEGMENT_ENTRY_EMPTY;
}
+#define pud_alloc_one(mm,address) ({ BUG(); ((pud_t *)2); })
+#define pud_free(x) do { } while (0)
+
#define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); })
#define pmd_free(x) do { } while (0)
-#define pgd_populate(mm, pmd, pte) BUG()
-#define pgd_populate_kernel(mm, pmd, pte) BUG()
+#define pgd_populate(mm, pgd, pud) BUG()
+#define pgd_populate_kernel(mm, pgd, pud) BUG()
+
+#define pud_populate(mm, pud, pmd) BUG()
+#define pud_populate_kernel(mm, pud, pmd) BUG()
#else /* __s390x__ */
@@ -69,6 +75,9 @@ static inline unsigned long pgd_entry_type(struct mm_struct *mm)
return _REGION3_ENTRY_EMPTY;
}
+#define pud_alloc_one(mm,address) ({ BUG(); ((pud_t *)2); })
+#define pud_free(x) do { } while (0)
+
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long vmaddr)
{
unsigned long *crst = crst_table_alloc(mm, s390_noexec);
@@ -78,20 +87,23 @@ static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long vmaddr)
}
#define pmd_free(pmd) crst_table_free((unsigned long *) pmd)
-static inline void pgd_populate_kernel(struct mm_struct *mm,
- pgd_t *pgd, pmd_t *pmd)
+#define pgd_populate(mm, pgd, pud) BUG()
+#define pgd_populate_kernel(mm, pgd, pud) BUG()
+
+static inline void pud_populate_kernel(struct mm_struct *mm,
+ pud_t *pud, pmd_t *pmd)
{
- pgd_val(*pgd) = _REGION3_ENTRY | __pa(pmd);
+ pud_val(*pud) = _REGION3_ENTRY | __pa(pmd);
}
-static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
+static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
{
- pgd_t *shadow_pgd = get_shadow_table(pgd);
+ pud_t *shadow_pud = get_shadow_table(pud);
pmd_t *shadow_pmd = get_shadow_table(pmd);
- if (shadow_pgd && shadow_pmd)
- pgd_populate_kernel(mm, shadow_pgd, shadow_pmd);
- pgd_populate_kernel(mm, pgd, pmd);
+ if (shadow_pud && shadow_pmd)
+ pud_populate_kernel(mm, shadow_pud, shadow_pmd);
+ pud_populate_kernel(mm, pud, pmd);
}
#endif /* __s390x__ */
diff --git a/include/asm-s390/pgtable.h b/include/asm-s390/pgtable.h
index f9f59a805e5..f2cc25b74ad 100644
--- a/include/asm-s390/pgtable.h
+++ b/include/asm-s390/pgtable.h
@@ -13,8 +13,6 @@
#ifndef _ASM_S390_PGTABLE_H
#define _ASM_S390_PGTABLE_H
-#include <asm-generic/4level-fixup.h>
-
/*
* The Linux memory management assumes a three-level page table setup. For
* s390 31 bit we "fold" the mid level into the top-level page table, so
@@ -60,14 +58,18 @@ extern char empty_zero_page[PAGE_SIZE];
*/
#ifndef __s390x__
# define PMD_SHIFT 22
+# define PUD_SHIFT 22
# define PGDIR_SHIFT 22
#else /* __s390x__ */
# define PMD_SHIFT 21
+# define PUD_SHIFT 31
# define PGDIR_SHIFT 31
#endif /* __s390x__ */
#define PMD_SIZE (1UL << PMD_SHIFT)
#define PMD_MASK (~(PMD_SIZE-1))
+#define PUD_SIZE (1UL << PUD_SHIFT)
+#define PUD_MASK (~(PUD_SIZE-1))
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE-1))
@@ -80,10 +82,12 @@ extern char empty_zero_page[PAGE_SIZE];
#ifndef __s390x__
# define PTRS_PER_PTE 1024
# define PTRS_PER_PMD 1
+# define PTRS_PER_PUD 1
# define PTRS_PER_PGD 512
#else /* __s390x__ */
# define PTRS_PER_PTE 512
# define PTRS_PER_PMD 1024
+# define PTRS_PER_PUD 1
# define PTRS_PER_PGD 2048
#endif /* __s390x__ */
@@ -93,6 +97,8 @@ extern char empty_zero_page[PAGE_SIZE];
printk("%s:%d: bad pte %p.\n", __FILE__, __LINE__, (void *) pte_val(e))
#define pmd_ERROR(e) \
printk("%s:%d: bad pmd %p.\n", __FILE__, __LINE__, (void *) pmd_val(e))
+#define pud_ERROR(e) \
+ printk("%s:%d: bad pud %p.\n", __FILE__, __LINE__, (void *) pud_val(e))
#define pgd_ERROR(e) \
printk("%s:%d: bad pgd %p.\n", __FILE__, __LINE__, (void *) pgd_val(e))
@@ -192,7 +198,7 @@ extern unsigned long vmalloc_end;
* I Segment-Invalid Bit: Segment is not available for address-translation
* TT Type 01
* TF
- * TL Table lenght
+ * TL Table length
*
* The 64 bit regiontable origin of S390 has following format:
* | region table origon | DTTL
@@ -435,22 +441,30 @@ static inline int pgd_present(pgd_t pgd) { return 1; }
static inline int pgd_none(pgd_t pgd) { return 0; }
static inline int pgd_bad(pgd_t pgd) { return 0; }
+static inline int pud_present(pud_t pud) { return 1; }
+static inline int pud_none(pud_t pud) { return 0; }
+static inline int pud_bad(pud_t pud) { return 0; }
+
#else /* __s390x__ */
-static inline int pgd_present(pgd_t pgd)
+static inline int pgd_present(pgd_t pgd) { return 1; }
+static inline int pgd_none(pgd_t pgd) { return 0; }
+static inline int pgd_bad(pgd_t pgd) { return 0; }
+
+static inline int pud_present(pud_t pud)
{
- return pgd_val(pgd) & _REGION_ENTRY_ORIGIN;
+ return pud_val(pud) & _REGION_ENTRY_ORIGIN;
}
-static inline int pgd_none(pgd_t pgd)
+static inline int pud_none(pud_t pud)
{
- return pgd_val(pgd) & _REGION_ENTRY_INV;
+ return pud_val(pud) & _REGION_ENTRY_INV;
}
-static inline int pgd_bad(pgd_t pgd)
+static inline int pud_bad(pud_t pud)
{
unsigned long mask = ~_REGION_ENTRY_ORIGIN & ~_REGION_ENTRY_INV;
- return (pgd_val(pgd) & mask) != _REGION3_ENTRY;
+ return (pud_val(pud) & mask) != _REGION3_ENTRY;
}
#endif /* __s390x__ */
@@ -526,7 +540,8 @@ static inline int pte_young(pte_t pte)
#ifndef __s390x__
-static inline void pgd_clear(pgd_t * pgdp) { }
+#define pgd_clear(pgd) do { } while (0)
+#define pud_clear(pud) do { } while (0)
static inline void pmd_clear_kernel(pmd_t * pmdp)
{
@@ -538,18 +553,20 @@ static inline void pmd_clear_kernel(pmd_t * pmdp)
#else /* __s390x__ */
-static inline void pgd_clear_kernel(pgd_t * pgdp)
+#define pgd_clear(pgd) do { } while (0)
+
+static inline void pud_clear_kernel(pud_t *pud)
{
- pgd_val(*pgdp) = _REGION3_ENTRY_EMPTY;
+ pud_val(*pud) = _REGION3_ENTRY_EMPTY;
}
-static inline void pgd_clear(pgd_t * pgdp)
+static inline void pud_clear(pud_t * pud)
{
- pgd_t *shadow_pgd = get_shadow_table(pgdp);
+ pud_t *shadow = get_shadow_table(pud);
- pgd_clear_kernel(pgdp);
- if (shadow_pgd)
- pgd_clear_kernel(shadow_pgd);
+ pud_clear_kernel(pud);
+ if (shadow)
+ pud_clear_kernel(shadow);
}
static inline void pmd_clear_kernel(pmd_t * pmdp)
@@ -810,63 +827,48 @@ static inline pte_t mk_pte(struct page *page, pgprot_t pgprot)
return mk_pte_phys(physpage, pgprot);
}
-static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot)
-{
- unsigned long physpage = __pa((pfn) << PAGE_SHIFT);
-
- return mk_pte_phys(physpage, pgprot);
-}
-
-#ifdef __s390x__
-
-static inline pmd_t pfn_pmd(unsigned long pfn, pgprot_t pgprot)
-{
- unsigned long physpage = __pa((pfn) << PAGE_SHIFT);
-
- return __pmd(physpage + pgprot_val(pgprot));
-}
-
-#endif /* __s390x__ */
-
-#define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT)
-#define pte_page(x) pfn_to_page(pte_pfn(x))
+#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
+#define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1))
+#define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
+#define pte_index(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE-1))
-#define pmd_page_vaddr(pmd) (pmd_val(pmd) & PAGE_MASK)
+#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
+#define pgd_offset_k(address) pgd_offset(&init_mm, address)
-#define pmd_page(pmd) pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)
+#ifndef __s390x__
-#define pgd_page_vaddr(pgd) (pgd_val(pgd) & PAGE_MASK)
+#define pmd_deref(pmd) (pmd_val(pmd) & _SEGMENT_ENTRY_ORIGIN)
+#define pud_deref(pmd) ({ BUG(); 0UL; })
+#define pgd_deref(pmd) ({ BUG(); 0UL; })
-#define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT)
+#define pud_offset(pgd, address) ((pud_t *) pgd)
+#define pmd_offset(pud, address) ((pmd_t *) pud + pmd_index(address))
-/* to find an entry in a page-table-directory */
-#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
-#define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address))
+#else /* __s390x__ */
-/* to find an entry in a kernel page-table-directory */
-#define pgd_offset_k(address) pgd_offset(&init_mm, address)
+#define pmd_deref(pmd) (pmd_val(pmd) & _SEGMENT_ENTRY_ORIGIN)
+#define pud_deref(pud) (pud_val(pud) & _REGION_ENTRY_ORIGIN)
+#define pgd_deref(pgd) ({ BUG(); 0UL; })
-#ifndef __s390x__
+#define pud_offset(pgd, address) ((pud_t *) pgd)
-/* Find an entry in the second-level page table.. */
-static inline pmd_t * pmd_offset(pgd_t * dir, unsigned long address)
+static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
{
- return (pmd_t *) dir;
+ pmd_t *pmd = (pmd_t *) pud_deref(*pud);
+ return pmd + pmd_index(address);
}
-#else /* __s390x__ */
+#endif /* __s390x__ */
-/* Find an entry in the second-level page table.. */
-#define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
-#define pmd_offset(dir,addr) \
- ((pmd_t *) pgd_page_vaddr(*(dir)) + pmd_index(addr))
+#define pfn_pte(pfn,pgprot) mk_pte_phys(__pa((pfn) << PAGE_SHIFT),(pgprot))
+#define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT)
+#define pte_page(x) pfn_to_page(pte_pfn(x))
-#endif /* __s390x__ */
+#define pmd_page(pmd) pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)
-/* Find an entry in the third-level page table.. */
-#define pte_index(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE-1))
-#define pte_offset_kernel(pmd, address) \
- ((pte_t *) pmd_page_vaddr(*(pmd)) + pte_index(address))
+/* Find an entry in the lowest level page table.. */
+#define pte_offset(pmd, addr) ((pte_t *) pmd_deref(*(pmd)) + pte_index(addr))
+#define pte_offset_kernel(pmd, address) pte_offset(pmd,address)
#define pte_offset_map(pmd, address) pte_offset_kernel(pmd, address)
#define pte_offset_map_nested(pmd, address) pte_offset_kernel(pmd, address)
#define pte_unmap(pte) do { } while (0)
@@ -959,4 +961,3 @@ extern void memmap_init(unsigned long, int, unsigned long, unsigned long);
#include <asm-generic/pgtable.h>
#endif /* _S390_PAGE_H */
-
diff --git a/include/asm-s390/tlb.h b/include/asm-s390/tlb.h
index 55ae45ef31b..618693cfc10 100644
--- a/include/asm-s390/tlb.h
+++ b/include/asm-s390/tlb.h
@@ -121,6 +121,8 @@ static inline void pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
#endif
}
+#define pud_free_tlb(tlb, pud) do { } while (0)
+
#define tlb_start_vma(tlb, vma) do { } while (0)
#define tlb_end_vma(tlb, vma) do { } while (0)
#define tlb_remove_tlb_entry(tlb, ptep, addr) do { } while (0)
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-01 09:07:48 +0000