Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * S390 version |
Heiko Carstens | a53c8fa | 2012-07-20 11:15:04 +0200 | [diff] [blame] | 3 | * Copyright IBM Corp. 1999, 2000 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * Author(s): Hartmut Penner (hp@de.ibm.com) |
| 5 | * Ulrich Weigand (weigand@de.ibm.com) |
| 6 | * Martin Schwidefsky (schwidefsky@de.ibm.com) |
| 7 | * |
| 8 | * Derived from "include/asm-i386/pgtable.h" |
| 9 | */ |
| 10 | |
| 11 | #ifndef _ASM_S390_PGTABLE_H |
| 12 | #define _ASM_S390_PGTABLE_H |
| 13 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | /* |
Martin Schwidefsky | a1c843b | 2015-04-22 13:55:59 +0200 | [diff] [blame] | 15 | * The Linux memory management assumes a three-level page table setup. |
| 16 | * For s390 64 bit we use up to four of the five levels the hardware |
| 17 | * provides (region first tables are not used). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | * |
| 19 | * The "pgd_xxx()" functions are trivial for a folded two-level |
| 20 | * setup: the pgd is never bad, and a pmd always exists (as it's folded |
| 21 | * into the pgd entry) |
| 22 | * |
| 23 | * This file contains the functions and defines necessary to modify and use |
| 24 | * the S390 page table tree. |
| 25 | */ |
| 26 | #ifndef __ASSEMBLY__ |
Heiko Carstens | 9789db0 | 2008-07-14 09:59:11 +0200 | [diff] [blame] | 27 | #include <linux/sched.h> |
Heiko Carstens | 2dcea57 | 2006-09-29 01:58:41 -0700 | [diff] [blame] | 28 | #include <linux/mm_types.h> |
Martin Schwidefsky | abf09be | 2012-11-07 13:17:37 +0100 | [diff] [blame] | 29 | #include <linux/page-flags.h> |
Martin Schwidefsky | 527e30b | 2014-04-30 16:04:25 +0200 | [diff] [blame] | 30 | #include <linux/radix-tree.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <asm/bug.h> |
Martin Schwidefsky | b2fa47e | 2011-05-23 10:24:40 +0200 | [diff] [blame] | 32 | #include <asm/page.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | extern pgd_t swapper_pg_dir[] __attribute__ ((aligned (4096))); |
| 35 | extern void paging_init(void); |
Heiko Carstens | 2b67fc4 | 2007-02-05 21:16:47 +0100 | [diff] [blame] | 36 | extern void vmem_map_init(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
| 38 | /* |
| 39 | * The S390 doesn't have any external MMU info: the kernel page |
| 40 | * tables contain all the necessary information. |
| 41 | */ |
Russell King | 4b3073e | 2009-12-18 16:40:18 +0000 | [diff] [blame] | 42 | #define update_mmu_cache(vma, address, ptep) do { } while (0) |
David Miller | b113da6 | 2012-10-08 16:34:25 -0700 | [diff] [blame] | 43 | #define update_mmu_cache_pmd(vma, address, ptep) do { } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
| 45 | /* |
Martin Schwidefsky | 238ec4e | 2010-10-25 16:10:07 +0200 | [diff] [blame] | 46 | * ZERO_PAGE is a global shared page that is always zero; used |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | * for zero-mapped memory areas etc.. |
| 48 | */ |
Martin Schwidefsky | 238ec4e | 2010-10-25 16:10:07 +0200 | [diff] [blame] | 49 | |
| 50 | extern unsigned long empty_zero_page; |
| 51 | extern unsigned long zero_page_mask; |
| 52 | |
| 53 | #define ZERO_PAGE(vaddr) \ |
| 54 | (virt_to_page((void *)(empty_zero_page + \ |
| 55 | (((unsigned long)(vaddr)) &zero_page_mask)))) |
Kirill A. Shutemov | 816422a | 2012-12-12 13:52:36 -0800 | [diff] [blame] | 56 | #define __HAVE_COLOR_ZERO_PAGE |
Martin Schwidefsky | 238ec4e | 2010-10-25 16:10:07 +0200 | [diff] [blame] | 57 | |
Linus Torvalds | 4f2e290 | 2013-04-17 08:46:19 -0700 | [diff] [blame] | 58 | /* TODO: s390 cannot support io_remap_pfn_range... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #endif /* !__ASSEMBLY__ */ |
| 60 | |
| 61 | /* |
| 62 | * PMD_SHIFT determines the size of the area a second-level page |
| 63 | * table can map |
| 64 | * PGDIR_SHIFT determines what a third-level page table entry can map |
| 65 | */ |
Heiko Carstens | 5a79859 | 2015-02-12 13:08:27 +0100 | [diff] [blame] | 66 | #define PMD_SHIFT 20 |
| 67 | #define PUD_SHIFT 31 |
| 68 | #define PGDIR_SHIFT 42 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
| 70 | #define PMD_SIZE (1UL << PMD_SHIFT) |
| 71 | #define PMD_MASK (~(PMD_SIZE-1)) |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame] | 72 | #define PUD_SIZE (1UL << PUD_SHIFT) |
| 73 | #define PUD_MASK (~(PUD_SIZE-1)) |
Martin Schwidefsky | 5a216a2 | 2008-02-09 18:24:36 +0100 | [diff] [blame] | 74 | #define PGDIR_SIZE (1UL << PGDIR_SHIFT) |
| 75 | #define PGDIR_MASK (~(PGDIR_SIZE-1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
| 77 | /* |
| 78 | * entries per page directory level: the S390 is two-level, so |
| 79 | * we don't really have any PMD directory physically. |
| 80 | * for S390 segment-table entries are combined to one PGD |
| 81 | * that leads to 1024 pte per pgd |
| 82 | */ |
Martin Schwidefsky | 146e4b3 | 2008-02-09 18:24:35 +0100 | [diff] [blame] | 83 | #define PTRS_PER_PTE 256 |
Martin Schwidefsky | 146e4b3 | 2008-02-09 18:24:35 +0100 | [diff] [blame] | 84 | #define PTRS_PER_PMD 2048 |
Martin Schwidefsky | 5a216a2 | 2008-02-09 18:24:36 +0100 | [diff] [blame] | 85 | #define PTRS_PER_PUD 2048 |
Martin Schwidefsky | 146e4b3 | 2008-02-09 18:24:35 +0100 | [diff] [blame] | 86 | #define PTRS_PER_PGD 2048 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
Kirill A. Shutemov | d016bf7 | 2015-02-11 15:26:41 -0800 | [diff] [blame] | 88 | #define FIRST_USER_ADDRESS 0UL |
Hugh Dickins | d455a36 | 2005-04-19 13:29:23 -0700 | [diff] [blame] | 89 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | #define pte_ERROR(e) \ |
| 91 | printk("%s:%d: bad pte %p.\n", __FILE__, __LINE__, (void *) pte_val(e)) |
| 92 | #define pmd_ERROR(e) \ |
| 93 | printk("%s:%d: bad pmd %p.\n", __FILE__, __LINE__, (void *) pmd_val(e)) |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame] | 94 | #define pud_ERROR(e) \ |
| 95 | printk("%s:%d: bad pud %p.\n", __FILE__, __LINE__, (void *) pud_val(e)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | #define pgd_ERROR(e) \ |
| 97 | printk("%s:%d: bad pgd %p.\n", __FILE__, __LINE__, (void *) pgd_val(e)) |
| 98 | |
| 99 | #ifndef __ASSEMBLY__ |
| 100 | /* |
Martin Schwidefsky | a1c843b | 2015-04-22 13:55:59 +0200 | [diff] [blame] | 101 | * The vmalloc and module area will always be on the topmost area of the |
| 102 | * kernel mapping. We reserve 128GB (64bit) for vmalloc and modules. |
Heiko Carstens | c972cc6 | 2012-10-05 16:52:18 +0200 | [diff] [blame] | 103 | * On 64 bit kernels we have a 2GB area at the top of the vmalloc area where |
| 104 | * modules will reside. That makes sure that inter module branches always |
| 105 | * happen without trampolines and in addition the placement within a 2GB frame |
| 106 | * is branch prediction unit friendly. |
Heiko Carstens | 8b62bc9 | 2006-12-04 15:40:56 +0100 | [diff] [blame] | 107 | */ |
Heiko Carstens | 239a6425 | 2009-06-12 10:26:33 +0200 | [diff] [blame] | 108 | extern unsigned long VMALLOC_START; |
Martin Schwidefsky | 14045eb | 2011-12-27 11:27:07 +0100 | [diff] [blame] | 109 | extern unsigned long VMALLOC_END; |
| 110 | extern struct page *vmemmap; |
Heiko Carstens | 239a6425 | 2009-06-12 10:26:33 +0200 | [diff] [blame] | 111 | |
Martin Schwidefsky | 14045eb | 2011-12-27 11:27:07 +0100 | [diff] [blame] | 112 | #define VMEM_MAX_PHYS ((unsigned long) vmemmap) |
Christian Borntraeger | 5fd9c6e | 2008-01-26 14:11:00 +0100 | [diff] [blame] | 113 | |
Heiko Carstens | c972cc6 | 2012-10-05 16:52:18 +0200 | [diff] [blame] | 114 | extern unsigned long MODULES_VADDR; |
| 115 | extern unsigned long MODULES_END; |
| 116 | #define MODULES_VADDR MODULES_VADDR |
| 117 | #define MODULES_END MODULES_END |
| 118 | #define MODULES_LEN (1UL << 31) |
Heiko Carstens | c972cc6 | 2012-10-05 16:52:18 +0200 | [diff] [blame] | 119 | |
Heiko Carstens | c933146 | 2014-10-15 12:17:38 +0200 | [diff] [blame] | 120 | static inline int is_module_addr(void *addr) |
| 121 | { |
Heiko Carstens | c933146 | 2014-10-15 12:17:38 +0200 | [diff] [blame] | 122 | BUILD_BUG_ON(MODULES_LEN > (1UL << 31)); |
| 123 | if (addr < (void *)MODULES_VADDR) |
| 124 | return 0; |
| 125 | if (addr > (void *)MODULES_END) |
| 126 | return 0; |
Heiko Carstens | c933146 | 2014-10-15 12:17:38 +0200 | [diff] [blame] | 127 | return 1; |
| 128 | } |
| 129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | * A 64 bit pagetable entry of S390 has following format: |
Christian Borntraeger | 6a985c6 | 2009-12-07 12:52:11 +0100 | [diff] [blame] | 132 | * | PFRA |0IPC| OS | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | * 0000000000111111111122222222223333333333444444444455555555556666 |
| 134 | * 0123456789012345678901234567890123456789012345678901234567890123 |
| 135 | * |
| 136 | * I Page-Invalid Bit: Page is not available for address-translation |
| 137 | * P Page-Protection Bit: Store access not possible for page |
Christian Borntraeger | 6a985c6 | 2009-12-07 12:52:11 +0100 | [diff] [blame] | 138 | * C Change-bit override: HW is not required to set change bit |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | * |
| 140 | * A 64 bit segmenttable entry of S390 has following format: |
| 141 | * | P-table origin | TT |
| 142 | * 0000000000111111111122222222223333333333444444444455555555556666 |
| 143 | * 0123456789012345678901234567890123456789012345678901234567890123 |
| 144 | * |
| 145 | * I Segment-Invalid Bit: Segment is not available for address-translation |
| 146 | * C Common-Segment Bit: Segment is not private (PoP 3-30) |
| 147 | * P Page-Protection Bit: Store access not possible for page |
| 148 | * TT Type 00 |
| 149 | * |
| 150 | * A 64 bit region table entry of S390 has following format: |
| 151 | * | S-table origin | TF TTTL |
| 152 | * 0000000000111111111122222222223333333333444444444455555555556666 |
| 153 | * 0123456789012345678901234567890123456789012345678901234567890123 |
| 154 | * |
| 155 | * I Segment-Invalid Bit: Segment is not available for address-translation |
| 156 | * TT Type 01 |
| 157 | * TF |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame] | 158 | * TL Table length |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | * |
| 160 | * The 64 bit regiontable origin of S390 has following format: |
| 161 | * | region table origon | DTTL |
| 162 | * 0000000000111111111122222222223333333333444444444455555555556666 |
| 163 | * 0123456789012345678901234567890123456789012345678901234567890123 |
| 164 | * |
| 165 | * X Space-Switch event: |
| 166 | * G Segment-Invalid Bit: |
| 167 | * P Private-Space Bit: |
| 168 | * S Storage-Alteration: |
| 169 | * R Real space |
| 170 | * TL Table-Length: |
| 171 | * |
| 172 | * A storage key has the following format: |
| 173 | * | ACC |F|R|C|0| |
| 174 | * 0 3 4 5 6 7 |
| 175 | * ACC: access key |
| 176 | * F : fetch protection bit |
| 177 | * R : referenced bit |
| 178 | * C : changed bit |
| 179 | */ |
| 180 | |
| 181 | /* Hardware bits in the page table entry */ |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 182 | #define _PAGE_PROTECT 0x200 /* HW read-only bit */ |
Martin Schwidefsky | 8337748 | 2006-10-18 18:30:51 +0200 | [diff] [blame] | 183 | #define _PAGE_INVALID 0x400 /* HW invalid bit */ |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 184 | #define _PAGE_LARGE 0x800 /* Bit to mark a large pte */ |
Martin Schwidefsky | 3610cce | 2007-10-22 12:52:47 +0200 | [diff] [blame] | 185 | |
| 186 | /* Software bits in the page table entry */ |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 187 | #define _PAGE_PRESENT 0x001 /* SW pte present bit */ |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 188 | #define _PAGE_YOUNG 0x004 /* SW pte young bit */ |
| 189 | #define _PAGE_DIRTY 0x008 /* SW pte dirty bit */ |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 190 | #define _PAGE_READ 0x010 /* SW pte read bit */ |
| 191 | #define _PAGE_WRITE 0x020 /* SW pte write bit */ |
| 192 | #define _PAGE_SPECIAL 0x040 /* SW associated with special page */ |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 193 | #define _PAGE_UNUSED 0x080 /* SW bit for pgste usage state */ |
Nick Piggin | a08cb62 | 2008-04-28 02:13:03 -0700 | [diff] [blame] | 194 | #define __HAVE_ARCH_PTE_SPECIAL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
Martin Schwidefsky | 5614dd9 | 2015-04-22 14:47:42 +0200 | [diff] [blame] | 196 | #ifdef CONFIG_MEM_SOFT_DIRTY |
| 197 | #define _PAGE_SOFT_DIRTY 0x002 /* SW pte soft dirty bit */ |
| 198 | #else |
| 199 | #define _PAGE_SOFT_DIRTY 0x000 |
| 200 | #endif |
| 201 | |
Nick Piggin | 138c902 | 2008-07-08 11:31:06 +0200 | [diff] [blame] | 202 | /* Set of bits not changed in pte_modify */ |
Heiko Carstens | 6a5c148 | 2014-09-22 08:50:51 +0200 | [diff] [blame] | 203 | #define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_SPECIAL | _PAGE_DIRTY | \ |
Martin Schwidefsky | 5614dd9 | 2015-04-22 14:47:42 +0200 | [diff] [blame] | 204 | _PAGE_YOUNG | _PAGE_SOFT_DIRTY) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | |
Martin Schwidefsky | 8337748 | 2006-10-18 18:30:51 +0200 | [diff] [blame] | 206 | /* |
Kirill A. Shutemov | 6e76d4b | 2015-02-10 14:11:04 -0800 | [diff] [blame] | 207 | * handle_pte_fault uses pte_present and pte_none to find out the pte type |
| 208 | * WITHOUT holding the page table lock. The _PAGE_PRESENT bit is used to |
| 209 | * distinguish present from not-present ptes. It is changed only with the page |
| 210 | * table lock held. |
Martin Schwidefsky | 8337748 | 2006-10-18 18:30:51 +0200 | [diff] [blame] | 211 | * |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 212 | * The following table gives the different possible bit combinations for |
Martin Schwidefsky | a1c843b | 2015-04-22 13:55:59 +0200 | [diff] [blame] | 213 | * the pte hardware and software bits in the last 12 bits of a pte |
| 214 | * (. unassigned bit, x don't care, t swap type): |
Martin Schwidefsky | 8337748 | 2006-10-18 18:30:51 +0200 | [diff] [blame] | 215 | * |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 216 | * 842100000000 |
| 217 | * 000084210000 |
| 218 | * 000000008421 |
Martin Schwidefsky | a1c843b | 2015-04-22 13:55:59 +0200 | [diff] [blame] | 219 | * .IR.uswrdy.p |
| 220 | * empty .10.00000000 |
| 221 | * swap .11..ttttt.0 |
| 222 | * prot-none, clean, old .11.xx0000.1 |
| 223 | * prot-none, clean, young .11.xx0001.1 |
| 224 | * prot-none, dirty, old .10.xx0010.1 |
| 225 | * prot-none, dirty, young .10.xx0011.1 |
| 226 | * read-only, clean, old .11.xx0100.1 |
| 227 | * read-only, clean, young .01.xx0101.1 |
| 228 | * read-only, dirty, old .11.xx0110.1 |
| 229 | * read-only, dirty, young .01.xx0111.1 |
| 230 | * read-write, clean, old .11.xx1100.1 |
| 231 | * read-write, clean, young .01.xx1101.1 |
| 232 | * read-write, dirty, old .10.xx1110.1 |
| 233 | * read-write, dirty, young .00.xx1111.1 |
| 234 | * HW-bits: R read-only, I invalid |
| 235 | * SW-bits: p present, y young, d dirty, r read, w write, s special, |
| 236 | * u unused, l large |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 237 | * |
Martin Schwidefsky | a1c843b | 2015-04-22 13:55:59 +0200 | [diff] [blame] | 238 | * pte_none is true for the bit pattern .10.00000000, pte == 0x400 |
| 239 | * pte_swap is true for the bit pattern .11..ooooo.0, (pte & 0x201) == 0x200 |
| 240 | * pte_present is true for the bit pattern .xx.xxxxxx.1, (pte & 0x001) == 0x001 |
Martin Schwidefsky | 8337748 | 2006-10-18 18:30:51 +0200 | [diff] [blame] | 241 | */ |
| 242 | |
Martin Schwidefsky | 3610cce | 2007-10-22 12:52:47 +0200 | [diff] [blame] | 243 | /* Bits in the segment/region table address-space-control-element */ |
| 244 | #define _ASCE_ORIGIN ~0xfffUL/* segment table origin */ |
| 245 | #define _ASCE_PRIVATE_SPACE 0x100 /* private space control */ |
| 246 | #define _ASCE_ALT_EVENT 0x80 /* storage alteration event control */ |
| 247 | #define _ASCE_SPACE_SWITCH 0x40 /* space switch event */ |
| 248 | #define _ASCE_REAL_SPACE 0x20 /* real space control */ |
| 249 | #define _ASCE_TYPE_MASK 0x0c /* asce table type mask */ |
| 250 | #define _ASCE_TYPE_REGION1 0x0c /* region first table type */ |
| 251 | #define _ASCE_TYPE_REGION2 0x08 /* region second table type */ |
| 252 | #define _ASCE_TYPE_REGION3 0x04 /* region third table type */ |
| 253 | #define _ASCE_TYPE_SEGMENT 0x00 /* segment table type */ |
| 254 | #define _ASCE_TABLE_LENGTH 0x03 /* region table length */ |
| 255 | |
| 256 | /* Bits in the region table entry */ |
| 257 | #define _REGION_ENTRY_ORIGIN ~0xfffUL/* region/segment table origin */ |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 258 | #define _REGION_ENTRY_PROTECT 0x200 /* region protection bit */ |
| 259 | #define _REGION_ENTRY_INVALID 0x20 /* invalid region table entry */ |
Martin Schwidefsky | 3610cce | 2007-10-22 12:52:47 +0200 | [diff] [blame] | 260 | #define _REGION_ENTRY_TYPE_MASK 0x0c /* region/segment table type mask */ |
| 261 | #define _REGION_ENTRY_TYPE_R1 0x0c /* region first table type */ |
| 262 | #define _REGION_ENTRY_TYPE_R2 0x08 /* region second table type */ |
| 263 | #define _REGION_ENTRY_TYPE_R3 0x04 /* region third table type */ |
| 264 | #define _REGION_ENTRY_LENGTH 0x03 /* region third length */ |
| 265 | |
| 266 | #define _REGION1_ENTRY (_REGION_ENTRY_TYPE_R1 | _REGION_ENTRY_LENGTH) |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 267 | #define _REGION1_ENTRY_EMPTY (_REGION_ENTRY_TYPE_R1 | _REGION_ENTRY_INVALID) |
Martin Schwidefsky | 3610cce | 2007-10-22 12:52:47 +0200 | [diff] [blame] | 268 | #define _REGION2_ENTRY (_REGION_ENTRY_TYPE_R2 | _REGION_ENTRY_LENGTH) |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 269 | #define _REGION2_ENTRY_EMPTY (_REGION_ENTRY_TYPE_R2 | _REGION_ENTRY_INVALID) |
Martin Schwidefsky | 3610cce | 2007-10-22 12:52:47 +0200 | [diff] [blame] | 270 | #define _REGION3_ENTRY (_REGION_ENTRY_TYPE_R3 | _REGION_ENTRY_LENGTH) |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 271 | #define _REGION3_ENTRY_EMPTY (_REGION_ENTRY_TYPE_R3 | _REGION_ENTRY_INVALID) |
Martin Schwidefsky | 3610cce | 2007-10-22 12:52:47 +0200 | [diff] [blame] | 272 | |
Heiko Carstens | 18da236 | 2012-10-08 09:18:26 +0200 | [diff] [blame] | 273 | #define _REGION3_ENTRY_LARGE 0x400 /* RTTE-format control, large page */ |
Heiko Carstens | 1819ed1 | 2013-02-16 11:47:27 +0100 | [diff] [blame] | 274 | #define _REGION3_ENTRY_RO 0x200 /* page protection bit */ |
Heiko Carstens | 18da236 | 2012-10-08 09:18:26 +0200 | [diff] [blame] | 275 | |
Martin Schwidefsky | 3610cce | 2007-10-22 12:52:47 +0200 | [diff] [blame] | 276 | /* Bits in the segment table entry */ |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 277 | #define _SEGMENT_ENTRY_BITS 0xfffffffffffffe33UL |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 278 | #define _SEGMENT_ENTRY_BITS_LARGE 0xfffffffffff0ff33UL |
Heiko Carstens | ea81531 | 2013-03-21 12:50:39 +0100 | [diff] [blame] | 279 | #define _SEGMENT_ENTRY_ORIGIN_LARGE ~0xfffffUL /* large page address */ |
Martin Schwidefsky | 3610cce | 2007-10-22 12:52:47 +0200 | [diff] [blame] | 280 | #define _SEGMENT_ENTRY_ORIGIN ~0x7ffUL/* segment table origin */ |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 281 | #define _SEGMENT_ENTRY_PROTECT 0x200 /* page protection bit */ |
| 282 | #define _SEGMENT_ENTRY_INVALID 0x20 /* invalid segment table entry */ |
Martin Schwidefsky | 3610cce | 2007-10-22 12:52:47 +0200 | [diff] [blame] | 283 | |
| 284 | #define _SEGMENT_ENTRY (0) |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 285 | #define _SEGMENT_ENTRY_EMPTY (_SEGMENT_ENTRY_INVALID) |
Martin Schwidefsky | 3610cce | 2007-10-22 12:52:47 +0200 | [diff] [blame] | 286 | |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 287 | #define _SEGMENT_ENTRY_DIRTY 0x2000 /* SW segment dirty bit */ |
| 288 | #define _SEGMENT_ENTRY_YOUNG 0x1000 /* SW segment young bit */ |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 289 | #define _SEGMENT_ENTRY_LARGE 0x0400 /* STE-format control, large page */ |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 290 | #define _SEGMENT_ENTRY_READ 0x0002 /* SW segment read bit */ |
| 291 | #define _SEGMENT_ENTRY_WRITE 0x0001 /* SW segment write bit */ |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 292 | |
Martin Schwidefsky | 5614dd9 | 2015-04-22 14:47:42 +0200 | [diff] [blame] | 293 | #ifdef CONFIG_MEM_SOFT_DIRTY |
| 294 | #define _SEGMENT_ENTRY_SOFT_DIRTY 0x4000 /* SW segment soft dirty bit */ |
| 295 | #else |
| 296 | #define _SEGMENT_ENTRY_SOFT_DIRTY 0x0000 /* SW segment soft dirty bit */ |
| 297 | #endif |
| 298 | |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 299 | /* |
| 300 | * Segment table entry encoding (R = read-only, I = invalid, y = young bit): |
Martin Schwidefsky | 13c6a79 | 2016-02-10 16:47:14 +0100 | [diff] [blame] | 301 | * dy..R...I...rw |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 302 | * prot-none, clean, old 00..1...1...00 |
| 303 | * prot-none, clean, young 01..1...1...00 |
| 304 | * prot-none, dirty, old 10..1...1...00 |
| 305 | * prot-none, dirty, young 11..1...1...00 |
Martin Schwidefsky | 13c6a79 | 2016-02-10 16:47:14 +0100 | [diff] [blame] | 306 | * read-only, clean, old 00..1...1...10 |
| 307 | * read-only, clean, young 01..1...0...10 |
| 308 | * read-only, dirty, old 10..1...1...10 |
| 309 | * read-only, dirty, young 11..1...0...10 |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 310 | * read-write, clean, old 00..1...1...11 |
| 311 | * read-write, clean, young 01..1...0...11 |
| 312 | * read-write, dirty, old 10..0...1...11 |
| 313 | * read-write, dirty, young 11..0...0...11 |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 314 | * The segment table origin is used to distinguish empty (origin==0) from |
| 315 | * read-write, old segment table entries (origin!=0) |
Martin Schwidefsky | a1c843b | 2015-04-22 13:55:59 +0200 | [diff] [blame] | 316 | * HW-bits: R read-only, I invalid |
| 317 | * SW-bits: y young, d dirty, r read, w write |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 318 | */ |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 319 | |
Martin Schwidefsky | 6c61cfe | 2011-06-06 14:14:42 +0200 | [diff] [blame] | 320 | /* Page status table bits for virtualization */ |
Martin Schwidefsky | 0d0dafc | 2013-05-17 14:41:33 +0200 | [diff] [blame] | 321 | #define PGSTE_ACC_BITS 0xf000000000000000UL |
| 322 | #define PGSTE_FP_BIT 0x0800000000000000UL |
| 323 | #define PGSTE_PCL_BIT 0x0080000000000000UL |
| 324 | #define PGSTE_HR_BIT 0x0040000000000000UL |
| 325 | #define PGSTE_HC_BIT 0x0020000000000000UL |
| 326 | #define PGSTE_GR_BIT 0x0004000000000000UL |
| 327 | #define PGSTE_GC_BIT 0x0002000000000000UL |
Martin Schwidefsky | 0a61b22 | 2013-10-18 12:03:41 +0200 | [diff] [blame] | 328 | #define PGSTE_UC_BIT 0x0000800000000000UL /* user dirty (migration) */ |
| 329 | #define PGSTE_IN_BIT 0x0000400000000000UL /* IPTE notify bit */ |
Martin Schwidefsky | 6c61cfe | 2011-06-06 14:14:42 +0200 | [diff] [blame] | 330 | |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 331 | /* Guest Page State used for virtualization */ |
| 332 | #define _PGSTE_GPS_ZERO 0x0000000080000000UL |
| 333 | #define _PGSTE_GPS_USAGE_MASK 0x0000000003000000UL |
| 334 | #define _PGSTE_GPS_USAGE_STABLE 0x0000000000000000UL |
| 335 | #define _PGSTE_GPS_USAGE_UNUSED 0x0000000001000000UL |
| 336 | |
Martin Schwidefsky | 3610cce | 2007-10-22 12:52:47 +0200 | [diff] [blame] | 337 | /* |
| 338 | * A user page table pointer has the space-switch-event bit, the |
| 339 | * private-space-control bit and the storage-alteration-event-control |
| 340 | * bit set. A kernel page table pointer doesn't need them. |
| 341 | */ |
| 342 | #define _ASCE_USER_BITS (_ASCE_SPACE_SWITCH | _ASCE_PRIVATE_SPACE | \ |
| 343 | _ASCE_ALT_EVENT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | /* |
Gerald Schaefer | 9282ed9 | 2006-09-20 15:59:37 +0200 | [diff] [blame] | 346 | * Page protection definitions. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | */ |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 348 | #define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_INVALID) |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 349 | #define PAGE_READ __pgprot(_PAGE_PRESENT | _PAGE_READ | \ |
| 350 | _PAGE_INVALID | _PAGE_PROTECT) |
| 351 | #define PAGE_WRITE __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ |
| 352 | _PAGE_INVALID | _PAGE_PROTECT) |
Gerald Schaefer | 9282ed9 | 2006-09-20 15:59:37 +0200 | [diff] [blame] | 353 | |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 354 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ |
| 355 | _PAGE_YOUNG | _PAGE_DIRTY) |
| 356 | #define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ |
| 357 | _PAGE_YOUNG | _PAGE_DIRTY) |
| 358 | #define PAGE_KERNEL_RO __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_YOUNG | \ |
| 359 | _PAGE_PROTECT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
| 361 | /* |
Martin Schwidefsky | 043d070 | 2011-05-23 10:24:23 +0200 | [diff] [blame] | 362 | * On s390 the page table entry has an invalid bit and a read-only bit. |
| 363 | * Read permission implies execute permission and write permission |
| 364 | * implies read permission. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | */ |
| 366 | /*xwr*/ |
Gerald Schaefer | 9282ed9 | 2006-09-20 15:59:37 +0200 | [diff] [blame] | 367 | #define __P000 PAGE_NONE |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 368 | #define __P001 PAGE_READ |
| 369 | #define __P010 PAGE_READ |
| 370 | #define __P011 PAGE_READ |
| 371 | #define __P100 PAGE_READ |
| 372 | #define __P101 PAGE_READ |
| 373 | #define __P110 PAGE_READ |
| 374 | #define __P111 PAGE_READ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | |
Gerald Schaefer | 9282ed9 | 2006-09-20 15:59:37 +0200 | [diff] [blame] | 376 | #define __S000 PAGE_NONE |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 377 | #define __S001 PAGE_READ |
| 378 | #define __S010 PAGE_WRITE |
| 379 | #define __S011 PAGE_WRITE |
| 380 | #define __S100 PAGE_READ |
| 381 | #define __S101 PAGE_READ |
| 382 | #define __S110 PAGE_WRITE |
| 383 | #define __S111 PAGE_WRITE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | |
Gerald Schaefer | 106c992 | 2013-04-29 15:07:23 -0700 | [diff] [blame] | 385 | /* |
| 386 | * Segment entry (large page) protection definitions. |
| 387 | */ |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 388 | #define SEGMENT_NONE __pgprot(_SEGMENT_ENTRY_INVALID | \ |
| 389 | _SEGMENT_ENTRY_PROTECT) |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 390 | #define SEGMENT_READ __pgprot(_SEGMENT_ENTRY_PROTECT | \ |
| 391 | _SEGMENT_ENTRY_READ) |
| 392 | #define SEGMENT_WRITE __pgprot(_SEGMENT_ENTRY_READ | \ |
| 393 | _SEGMENT_ENTRY_WRITE) |
Gerald Schaefer | 106c992 | 2013-04-29 15:07:23 -0700 | [diff] [blame] | 394 | |
Martin Schwidefsky | b2fa47e | 2011-05-23 10:24:40 +0200 | [diff] [blame] | 395 | static inline int mm_has_pgste(struct mm_struct *mm) |
| 396 | { |
| 397 | #ifdef CONFIG_PGSTE |
| 398 | if (unlikely(mm->context.has_pgste)) |
| 399 | return 1; |
| 400 | #endif |
| 401 | return 0; |
| 402 | } |
Dominik Dingel | 65eef335 | 2014-01-14 15:02:11 +0100 | [diff] [blame] | 403 | |
Martin Schwidefsky | 0b46e0a | 2015-04-15 13:23:26 +0200 | [diff] [blame] | 404 | static inline int mm_alloc_pgste(struct mm_struct *mm) |
| 405 | { |
| 406 | #ifdef CONFIG_PGSTE |
| 407 | if (unlikely(mm->context.alloc_pgste)) |
| 408 | return 1; |
| 409 | #endif |
| 410 | return 0; |
| 411 | } |
| 412 | |
Dominik Dingel | 2faee8f | 2014-10-23 12:08:38 +0200 | [diff] [blame] | 413 | /* |
| 414 | * In the case that a guest uses storage keys |
| 415 | * faults should no longer be backed by zero pages |
| 416 | */ |
| 417 | #define mm_forbids_zeropage mm_use_skey |
Dominik Dingel | 65eef335 | 2014-01-14 15:02:11 +0100 | [diff] [blame] | 418 | static inline int mm_use_skey(struct mm_struct *mm) |
| 419 | { |
| 420 | #ifdef CONFIG_PGSTE |
| 421 | if (mm->context.use_skey) |
| 422 | return 1; |
| 423 | #endif |
| 424 | return 0; |
| 425 | } |
| 426 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | /* |
| 428 | * pgd/pmd/pte query functions |
| 429 | */ |
Martin Schwidefsky | 5a216a2 | 2008-02-09 18:24:36 +0100 | [diff] [blame] | 430 | static inline int pgd_present(pgd_t pgd) |
| 431 | { |
Martin Schwidefsky | 6252d70 | 2008-02-09 18:24:37 +0100 | [diff] [blame] | 432 | if ((pgd_val(pgd) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R2) |
| 433 | return 1; |
Martin Schwidefsky | 5a216a2 | 2008-02-09 18:24:36 +0100 | [diff] [blame] | 434 | return (pgd_val(pgd) & _REGION_ENTRY_ORIGIN) != 0UL; |
| 435 | } |
| 436 | |
| 437 | static inline int pgd_none(pgd_t pgd) |
| 438 | { |
Martin Schwidefsky | 6252d70 | 2008-02-09 18:24:37 +0100 | [diff] [blame] | 439 | if ((pgd_val(pgd) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R2) |
| 440 | return 0; |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 441 | return (pgd_val(pgd) & _REGION_ENTRY_INVALID) != 0UL; |
Martin Schwidefsky | 5a216a2 | 2008-02-09 18:24:36 +0100 | [diff] [blame] | 442 | } |
| 443 | |
| 444 | static inline int pgd_bad(pgd_t pgd) |
| 445 | { |
Martin Schwidefsky | 6252d70 | 2008-02-09 18:24:37 +0100 | [diff] [blame] | 446 | /* |
| 447 | * With dynamic page table levels the pgd can be a region table |
| 448 | * entry or a segment table entry. Check for the bit that are |
| 449 | * invalid for either table entry. |
| 450 | */ |
Martin Schwidefsky | 5a216a2 | 2008-02-09 18:24:36 +0100 | [diff] [blame] | 451 | unsigned long mask = |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 452 | ~_SEGMENT_ENTRY_ORIGIN & ~_REGION_ENTRY_INVALID & |
Martin Schwidefsky | 5a216a2 | 2008-02-09 18:24:36 +0100 | [diff] [blame] | 453 | ~_REGION_ENTRY_TYPE_MASK & ~_REGION_ENTRY_LENGTH; |
| 454 | return (pgd_val(pgd) & mask) != 0; |
| 455 | } |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame] | 456 | |
| 457 | static inline int pud_present(pud_t pud) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | { |
Martin Schwidefsky | 6252d70 | 2008-02-09 18:24:37 +0100 | [diff] [blame] | 459 | if ((pud_val(pud) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R3) |
| 460 | return 1; |
Martin Schwidefsky | 0d01792 | 2007-12-17 16:25:48 +0100 | [diff] [blame] | 461 | return (pud_val(pud) & _REGION_ENTRY_ORIGIN) != 0UL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | } |
| 463 | |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame] | 464 | static inline int pud_none(pud_t pud) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | { |
Martin Schwidefsky | 6252d70 | 2008-02-09 18:24:37 +0100 | [diff] [blame] | 466 | if ((pud_val(pud) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R3) |
| 467 | return 0; |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 468 | return (pud_val(pud) & _REGION_ENTRY_INVALID) != 0UL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | } |
| 470 | |
Heiko Carstens | 18da236 | 2012-10-08 09:18:26 +0200 | [diff] [blame] | 471 | static inline int pud_large(pud_t pud) |
| 472 | { |
| 473 | if ((pud_val(pud) & _REGION_ENTRY_TYPE_MASK) != _REGION_ENTRY_TYPE_R3) |
| 474 | return 0; |
| 475 | return !!(pud_val(pud) & _REGION3_ENTRY_LARGE); |
| 476 | } |
| 477 | |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame] | 478 | static inline int pud_bad(pud_t pud) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | { |
Martin Schwidefsky | 6252d70 | 2008-02-09 18:24:37 +0100 | [diff] [blame] | 480 | /* |
| 481 | * With dynamic page table levels the pud can be a region table |
| 482 | * entry or a segment table entry. Check for the bit that are |
| 483 | * invalid for either table entry. |
| 484 | */ |
Martin Schwidefsky | 5a216a2 | 2008-02-09 18:24:36 +0100 | [diff] [blame] | 485 | unsigned long mask = |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 486 | ~_SEGMENT_ENTRY_ORIGIN & ~_REGION_ENTRY_INVALID & |
Martin Schwidefsky | 5a216a2 | 2008-02-09 18:24:36 +0100 | [diff] [blame] | 487 | ~_REGION_ENTRY_TYPE_MASK & ~_REGION_ENTRY_LENGTH; |
| 488 | return (pud_val(pud) & mask) != 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | } |
| 490 | |
Adrian Bunk | 4448aaf | 2005-11-08 21:34:42 -0800 | [diff] [blame] | 491 | static inline int pmd_present(pmd_t pmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | { |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 493 | return pmd_val(pmd) != _SEGMENT_ENTRY_INVALID; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | } |
| 495 | |
Adrian Bunk | 4448aaf | 2005-11-08 21:34:42 -0800 | [diff] [blame] | 496 | static inline int pmd_none(pmd_t pmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | { |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 498 | return pmd_val(pmd) == _SEGMENT_ENTRY_INVALID; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | } |
| 500 | |
Heiko Carstens | 378b1e7 | 2012-10-01 12:58:34 +0200 | [diff] [blame] | 501 | static inline int pmd_large(pmd_t pmd) |
| 502 | { |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 503 | return (pmd_val(pmd) & _SEGMENT_ENTRY_LARGE) != 0; |
Heiko Carstens | 378b1e7 | 2012-10-01 12:58:34 +0200 | [diff] [blame] | 504 | } |
| 505 | |
Martin Schwidefsky | 7cded34 | 2015-05-13 14:33:22 +0200 | [diff] [blame] | 506 | static inline unsigned long pmd_pfn(pmd_t pmd) |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 507 | { |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 508 | unsigned long origin_mask; |
| 509 | |
| 510 | origin_mask = _SEGMENT_ENTRY_ORIGIN; |
| 511 | if (pmd_large(pmd)) |
| 512 | origin_mask = _SEGMENT_ENTRY_ORIGIN_LARGE; |
| 513 | return (pmd_val(pmd) & origin_mask) >> PAGE_SHIFT; |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 514 | } |
| 515 | |
Adrian Bunk | 4448aaf | 2005-11-08 21:34:42 -0800 | [diff] [blame] | 516 | static inline int pmd_bad(pmd_t pmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | { |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 518 | if (pmd_large(pmd)) |
| 519 | return (pmd_val(pmd) & ~_SEGMENT_ENTRY_BITS_LARGE) != 0; |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 520 | return (pmd_val(pmd) & ~_SEGMENT_ENTRY_BITS) != 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | } |
| 522 | |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 523 | #define __HAVE_ARCH_PMD_WRITE |
| 524 | static inline int pmd_write(pmd_t pmd) |
| 525 | { |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 526 | return (pmd_val(pmd) & _SEGMENT_ENTRY_WRITE) != 0; |
| 527 | } |
| 528 | |
| 529 | static inline int pmd_dirty(pmd_t pmd) |
| 530 | { |
| 531 | int dirty = 1; |
| 532 | if (pmd_large(pmd)) |
| 533 | dirty = (pmd_val(pmd) & _SEGMENT_ENTRY_DIRTY) != 0; |
| 534 | return dirty; |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 535 | } |
| 536 | |
| 537 | static inline int pmd_young(pmd_t pmd) |
| 538 | { |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 539 | int young = 1; |
| 540 | if (pmd_large(pmd)) |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 541 | young = (pmd_val(pmd) & _SEGMENT_ENTRY_YOUNG) != 0; |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 542 | return young; |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 543 | } |
| 544 | |
Adrian Bunk | 4448aaf | 2005-11-08 21:34:42 -0800 | [diff] [blame] | 545 | static inline int pte_present(pte_t pte) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | { |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 547 | /* Bit pattern: (pte & 0x001) == 0x001 */ |
| 548 | return (pte_val(pte) & _PAGE_PRESENT) != 0; |
| 549 | } |
| 550 | |
| 551 | static inline int pte_none(pte_t pte) |
| 552 | { |
| 553 | /* Bit pattern: pte == 0x400 */ |
| 554 | return pte_val(pte) == _PAGE_INVALID; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | } |
| 556 | |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 557 | static inline int pte_swap(pte_t pte) |
| 558 | { |
Martin Schwidefsky | a1c843b | 2015-04-22 13:55:59 +0200 | [diff] [blame] | 559 | /* Bit pattern: (pte & 0x201) == 0x200 */ |
| 560 | return (pte_val(pte) & (_PAGE_PROTECT | _PAGE_PRESENT)) |
| 561 | == _PAGE_PROTECT; |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 562 | } |
| 563 | |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 564 | static inline int pte_special(pte_t pte) |
| 565 | { |
Nick Piggin | a08cb62 | 2008-04-28 02:13:03 -0700 | [diff] [blame] | 566 | return (pte_val(pte) & _PAGE_SPECIAL); |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 567 | } |
| 568 | |
Martin Schwidefsky | ba8a922 | 2007-10-22 12:52:44 +0200 | [diff] [blame] | 569 | #define __HAVE_ARCH_PTE_SAME |
Martin Schwidefsky | b2fa47e | 2011-05-23 10:24:40 +0200 | [diff] [blame] | 570 | static inline int pte_same(pte_t a, pte_t b) |
Christian Borntraeger | 5b7baf0 | 2008-03-25 18:47:12 +0100 | [diff] [blame] | 571 | { |
Martin Schwidefsky | b2fa47e | 2011-05-23 10:24:40 +0200 | [diff] [blame] | 572 | return pte_val(a) == pte_val(b); |
Christian Borntraeger | 5b7baf0 | 2008-03-25 18:47:12 +0100 | [diff] [blame] | 573 | } |
| 574 | |
Martin Schwidefsky | b54565b | 2014-09-23 14:01:34 +0200 | [diff] [blame] | 575 | #ifdef CONFIG_NUMA_BALANCING |
| 576 | static inline int pte_protnone(pte_t pte) |
| 577 | { |
| 578 | return pte_present(pte) && !(pte_val(pte) & _PAGE_READ); |
| 579 | } |
| 580 | |
| 581 | static inline int pmd_protnone(pmd_t pmd) |
| 582 | { |
| 583 | /* pmd_large(pmd) implies pmd_present(pmd) */ |
| 584 | return pmd_large(pmd) && !(pmd_val(pmd) & _SEGMENT_ENTRY_READ); |
| 585 | } |
| 586 | #endif |
| 587 | |
Martin Schwidefsky | 5614dd9 | 2015-04-22 14:47:42 +0200 | [diff] [blame] | 588 | static inline int pte_soft_dirty(pte_t pte) |
| 589 | { |
| 590 | return pte_val(pte) & _PAGE_SOFT_DIRTY; |
| 591 | } |
| 592 | #define pte_swp_soft_dirty pte_soft_dirty |
| 593 | |
| 594 | static inline pte_t pte_mksoft_dirty(pte_t pte) |
| 595 | { |
| 596 | pte_val(pte) |= _PAGE_SOFT_DIRTY; |
| 597 | return pte; |
| 598 | } |
| 599 | #define pte_swp_mksoft_dirty pte_mksoft_dirty |
| 600 | |
| 601 | static inline pte_t pte_clear_soft_dirty(pte_t pte) |
| 602 | { |
| 603 | pte_val(pte) &= ~_PAGE_SOFT_DIRTY; |
| 604 | return pte; |
| 605 | } |
| 606 | #define pte_swp_clear_soft_dirty pte_clear_soft_dirty |
| 607 | |
| 608 | static inline int pmd_soft_dirty(pmd_t pmd) |
| 609 | { |
| 610 | return pmd_val(pmd) & _SEGMENT_ENTRY_SOFT_DIRTY; |
| 611 | } |
| 612 | |
| 613 | static inline pmd_t pmd_mksoft_dirty(pmd_t pmd) |
| 614 | { |
| 615 | pmd_val(pmd) |= _SEGMENT_ENTRY_SOFT_DIRTY; |
| 616 | return pmd; |
| 617 | } |
| 618 | |
| 619 | static inline pmd_t pmd_clear_soft_dirty(pmd_t pmd) |
| 620 | { |
| 621 | pmd_val(pmd) &= ~_SEGMENT_ENTRY_SOFT_DIRTY; |
| 622 | return pmd; |
| 623 | } |
| 624 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | /* |
| 626 | * query functions pte_write/pte_dirty/pte_young only work if |
| 627 | * pte_present() is true. Undefined behaviour if not.. |
| 628 | */ |
Adrian Bunk | 4448aaf | 2005-11-08 21:34:42 -0800 | [diff] [blame] | 629 | static inline int pte_write(pte_t pte) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | { |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 631 | return (pte_val(pte) & _PAGE_WRITE) != 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | } |
| 633 | |
Adrian Bunk | 4448aaf | 2005-11-08 21:34:42 -0800 | [diff] [blame] | 634 | static inline int pte_dirty(pte_t pte) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | { |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 636 | return (pte_val(pte) & _PAGE_DIRTY) != 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | } |
| 638 | |
Adrian Bunk | 4448aaf | 2005-11-08 21:34:42 -0800 | [diff] [blame] | 639 | static inline int pte_young(pte_t pte) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | { |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 641 | return (pte_val(pte) & _PAGE_YOUNG) != 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | } |
| 643 | |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 644 | #define __HAVE_ARCH_PTE_UNUSED |
| 645 | static inline int pte_unused(pte_t pte) |
| 646 | { |
| 647 | return pte_val(pte) & _PAGE_UNUSED; |
| 648 | } |
| 649 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | /* |
| 651 | * pgd/pmd/pte modification functions |
| 652 | */ |
| 653 | |
Martin Schwidefsky | b2fa47e | 2011-05-23 10:24:40 +0200 | [diff] [blame] | 654 | static inline void pgd_clear(pgd_t *pgd) |
Martin Schwidefsky | 5a216a2 | 2008-02-09 18:24:36 +0100 | [diff] [blame] | 655 | { |
Martin Schwidefsky | 6252d70 | 2008-02-09 18:24:37 +0100 | [diff] [blame] | 656 | if ((pgd_val(*pgd) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R2) |
| 657 | pgd_val(*pgd) = _REGION2_ENTRY_EMPTY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | } |
| 659 | |
Martin Schwidefsky | 6252d70 | 2008-02-09 18:24:37 +0100 | [diff] [blame] | 660 | static inline void pud_clear(pud_t *pud) |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 661 | { |
Martin Schwidefsky | b2fa47e | 2011-05-23 10:24:40 +0200 | [diff] [blame] | 662 | if ((pud_val(*pud) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R3) |
| 663 | pud_val(*pud) = _REGION3_ENTRY_EMPTY; |
Gerald Schaefer | c1821c2 | 2007-02-05 21:18:17 +0100 | [diff] [blame] | 664 | } |
Martin Schwidefsky | 146e4b3 | 2008-02-09 18:24:35 +0100 | [diff] [blame] | 665 | |
Martin Schwidefsky | b2fa47e | 2011-05-23 10:24:40 +0200 | [diff] [blame] | 666 | static inline void pmd_clear(pmd_t *pmdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | { |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 668 | pmd_val(*pmdp) = _SEGMENT_ENTRY_INVALID; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | } |
| 670 | |
Adrian Bunk | 4448aaf | 2005-11-08 21:34:42 -0800 | [diff] [blame] | 671 | static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | { |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 673 | pte_val(*ptep) = _PAGE_INVALID; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | } |
| 675 | |
| 676 | /* |
| 677 | * The following pte modification functions only work if |
| 678 | * pte_present() is true. Undefined behaviour if not.. |
| 679 | */ |
Adrian Bunk | 4448aaf | 2005-11-08 21:34:42 -0800 | [diff] [blame] | 680 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | { |
Nick Piggin | 138c902 | 2008-07-08 11:31:06 +0200 | [diff] [blame] | 682 | pte_val(pte) &= _PAGE_CHG_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | pte_val(pte) |= pgprot_val(newprot); |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 684 | /* |
| 685 | * newprot for PAGE_NONE, PAGE_READ and PAGE_WRITE has the |
| 686 | * invalid bit set, clear it again for readable, young pages |
| 687 | */ |
| 688 | if ((pte_val(pte) & _PAGE_YOUNG) && (pte_val(pte) & _PAGE_READ)) |
| 689 | pte_val(pte) &= ~_PAGE_INVALID; |
| 690 | /* |
| 691 | * newprot for PAGE_READ and PAGE_WRITE has the page protection |
| 692 | * bit set, clear it again for writable, dirty pages |
| 693 | */ |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 694 | if ((pte_val(pte) & _PAGE_DIRTY) && (pte_val(pte) & _PAGE_WRITE)) |
| 695 | pte_val(pte) &= ~_PAGE_PROTECT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | return pte; |
| 697 | } |
| 698 | |
Adrian Bunk | 4448aaf | 2005-11-08 21:34:42 -0800 | [diff] [blame] | 699 | static inline pte_t pte_wrprotect(pte_t pte) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | { |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 701 | pte_val(pte) &= ~_PAGE_WRITE; |
| 702 | pte_val(pte) |= _PAGE_PROTECT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | return pte; |
| 704 | } |
| 705 | |
Adrian Bunk | 4448aaf | 2005-11-08 21:34:42 -0800 | [diff] [blame] | 706 | static inline pte_t pte_mkwrite(pte_t pte) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | { |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 708 | pte_val(pte) |= _PAGE_WRITE; |
| 709 | if (pte_val(pte) & _PAGE_DIRTY) |
| 710 | pte_val(pte) &= ~_PAGE_PROTECT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | return pte; |
| 712 | } |
| 713 | |
Adrian Bunk | 4448aaf | 2005-11-08 21:34:42 -0800 | [diff] [blame] | 714 | static inline pte_t pte_mkclean(pte_t pte) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | { |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 716 | pte_val(pte) &= ~_PAGE_DIRTY; |
| 717 | pte_val(pte) |= _PAGE_PROTECT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | return pte; |
| 719 | } |
| 720 | |
Adrian Bunk | 4448aaf | 2005-11-08 21:34:42 -0800 | [diff] [blame] | 721 | static inline pte_t pte_mkdirty(pte_t pte) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | { |
Martin Schwidefsky | 5614dd9 | 2015-04-22 14:47:42 +0200 | [diff] [blame] | 723 | pte_val(pte) |= _PAGE_DIRTY | _PAGE_SOFT_DIRTY; |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 724 | if (pte_val(pte) & _PAGE_WRITE) |
| 725 | pte_val(pte) &= ~_PAGE_PROTECT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | return pte; |
| 727 | } |
| 728 | |
Adrian Bunk | 4448aaf | 2005-11-08 21:34:42 -0800 | [diff] [blame] | 729 | static inline pte_t pte_mkold(pte_t pte) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | { |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 731 | pte_val(pte) &= ~_PAGE_YOUNG; |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 732 | pte_val(pte) |= _PAGE_INVALID; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | return pte; |
| 734 | } |
| 735 | |
Adrian Bunk | 4448aaf | 2005-11-08 21:34:42 -0800 | [diff] [blame] | 736 | static inline pte_t pte_mkyoung(pte_t pte) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | { |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 738 | pte_val(pte) |= _PAGE_YOUNG; |
| 739 | if (pte_val(pte) & _PAGE_READ) |
| 740 | pte_val(pte) &= ~_PAGE_INVALID; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | return pte; |
| 742 | } |
| 743 | |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 744 | static inline pte_t pte_mkspecial(pte_t pte) |
| 745 | { |
Nick Piggin | a08cb62 | 2008-04-28 02:13:03 -0700 | [diff] [blame] | 746 | pte_val(pte) |= _PAGE_SPECIAL; |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 747 | return pte; |
| 748 | } |
| 749 | |
Heiko Carstens | 84afdce | 2010-10-25 16:10:36 +0200 | [diff] [blame] | 750 | #ifdef CONFIG_HUGETLB_PAGE |
| 751 | static inline pte_t pte_mkhuge(pte_t pte) |
| 752 | { |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 753 | pte_val(pte) |= _PAGE_LARGE; |
Heiko Carstens | 84afdce | 2010-10-25 16:10:36 +0200 | [diff] [blame] | 754 | return pte; |
| 755 | } |
| 756 | #endif |
| 757 | |
Gerald Schaefer | 9282ed9 | 2006-09-20 15:59:37 +0200 | [diff] [blame] | 758 | static inline void __ptep_ipte(unsigned long address, pte_t *ptep) |
| 759 | { |
Martin Schwidefsky | 53e857f | 2012-09-10 13:00:09 +0200 | [diff] [blame] | 760 | unsigned long pto = (unsigned long) ptep; |
| 761 | |
Martin Schwidefsky | 53e857f | 2012-09-10 13:00:09 +0200 | [diff] [blame] | 762 | /* Invalidation + global TLB flush for the pte */ |
| 763 | asm volatile( |
| 764 | " ipte %2,%3" |
| 765 | : "=m" (*ptep) : "m" (*ptep), "a" (pto), "a" (address)); |
| 766 | } |
| 767 | |
Martin Schwidefsky | 1b948d6 | 2014-04-03 13:55:01 +0200 | [diff] [blame] | 768 | static inline void __ptep_ipte_local(unsigned long address, pte_t *ptep) |
| 769 | { |
| 770 | unsigned long pto = (unsigned long) ptep; |
| 771 | |
Martin Schwidefsky | 1b948d6 | 2014-04-03 13:55:01 +0200 | [diff] [blame] | 772 | /* Invalidation + local TLB flush for the pte */ |
| 773 | asm volatile( |
| 774 | " .insn rrf,0xb2210000,%2,%3,0,1" |
| 775 | : "=m" (*ptep) : "m" (*ptep), "a" (pto), "a" (address)); |
| 776 | } |
| 777 | |
Heiko Carstens | cfb0b24 | 2014-09-23 21:29:20 +0200 | [diff] [blame] | 778 | static inline void __ptep_ipte_range(unsigned long address, int nr, pte_t *ptep) |
| 779 | { |
| 780 | unsigned long pto = (unsigned long) ptep; |
| 781 | |
Heiko Carstens | cfb0b24 | 2014-09-23 21:29:20 +0200 | [diff] [blame] | 782 | /* Invalidate a range of ptes + global TLB flush of the ptes */ |
| 783 | do { |
| 784 | asm volatile( |
| 785 | " .insn rrf,0xb2210000,%2,%0,%1,0" |
| 786 | : "+a" (address), "+a" (nr) : "a" (pto) : "memory"); |
| 787 | } while (nr != 255); |
| 788 | } |
| 789 | |
Martin Schwidefsky | ba8a922 | 2007-10-22 12:52:44 +0200 | [diff] [blame] | 790 | /* |
| 791 | * This is hard to understand. ptep_get_and_clear and ptep_clear_flush |
| 792 | * both clear the TLB for the unmapped pte. The reason is that |
| 793 | * ptep_get_and_clear is used in common code (e.g. change_pte_range) |
| 794 | * to modify an active pte. The sequence is |
| 795 | * 1) ptep_get_and_clear |
| 796 | * 2) set_pte_at |
| 797 | * 3) flush_tlb_range |
| 798 | * On s390 the tlb needs to get flushed with the modification of the pte |
| 799 | * if the pte is active. The only way how this can be implemented is to |
| 800 | * have ptep_get_and_clear do the tlb flush. In exchange flush_tlb_range |
| 801 | * is a nop. |
| 802 | */ |
Martin Schwidefsky | ebde765 | 2016-03-08 11:08:09 +0100 | [diff] [blame] | 803 | pte_t ptep_xchg_direct(struct mm_struct *, unsigned long, pte_t *, pte_t); |
| 804 | pte_t ptep_xchg_lazy(struct mm_struct *, unsigned long, pte_t *, pte_t); |
| 805 | |
| 806 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG |
| 807 | static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, |
| 808 | unsigned long addr, pte_t *ptep) |
| 809 | { |
| 810 | pte_t pte = *ptep; |
| 811 | |
| 812 | pte = ptep_xchg_direct(vma->vm_mm, addr, ptep, pte_mkold(pte)); |
| 813 | return pte_young(pte); |
| 814 | } |
| 815 | |
| 816 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH |
| 817 | static inline int ptep_clear_flush_young(struct vm_area_struct *vma, |
| 818 | unsigned long address, pte_t *ptep) |
| 819 | { |
| 820 | return ptep_test_and_clear_young(vma, address, ptep); |
| 821 | } |
| 822 | |
Martin Schwidefsky | ba8a922 | 2007-10-22 12:52:44 +0200 | [diff] [blame] | 823 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR |
Martin Schwidefsky | b2fa47e | 2011-05-23 10:24:40 +0200 | [diff] [blame] | 824 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, |
Martin Schwidefsky | ebde765 | 2016-03-08 11:08:09 +0100 | [diff] [blame] | 825 | unsigned long addr, pte_t *ptep) |
Martin Schwidefsky | b2fa47e | 2011-05-23 10:24:40 +0200 | [diff] [blame] | 826 | { |
Martin Schwidefsky | ebde765 | 2016-03-08 11:08:09 +0100 | [diff] [blame] | 827 | return ptep_xchg_lazy(mm, addr, ptep, __pte(_PAGE_INVALID)); |
Martin Schwidefsky | b2fa47e | 2011-05-23 10:24:40 +0200 | [diff] [blame] | 828 | } |
| 829 | |
| 830 | #define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION |
Martin Schwidefsky | ebde765 | 2016-03-08 11:08:09 +0100 | [diff] [blame] | 831 | pte_t ptep_modify_prot_start(struct mm_struct *, unsigned long, pte_t *); |
| 832 | void ptep_modify_prot_commit(struct mm_struct *, unsigned long, pte_t *, pte_t); |
Martin Schwidefsky | ba8a922 | 2007-10-22 12:52:44 +0200 | [diff] [blame] | 833 | |
| 834 | #define __HAVE_ARCH_PTEP_CLEAR_FLUSH |
Martin Schwidefsky | f0e47c2 | 2007-07-17 04:03:03 -0700 | [diff] [blame] | 835 | static inline pte_t ptep_clear_flush(struct vm_area_struct *vma, |
Martin Schwidefsky | ebde765 | 2016-03-08 11:08:09 +0100 | [diff] [blame] | 836 | unsigned long addr, pte_t *ptep) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | { |
Martin Schwidefsky | ebde765 | 2016-03-08 11:08:09 +0100 | [diff] [blame] | 838 | return ptep_xchg_direct(vma->vm_mm, addr, ptep, __pte(_PAGE_INVALID)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | } |
| 840 | |
Martin Schwidefsky | ba8a922 | 2007-10-22 12:52:44 +0200 | [diff] [blame] | 841 | /* |
| 842 | * The batched pte unmap code uses ptep_get_and_clear_full to clear the |
| 843 | * ptes. Here an optimization is possible. tlb_gather_mmu flushes all |
| 844 | * tlbs of an mm if it can guarantee that the ptes of the mm_struct |
| 845 | * cannot be accessed while the batched unmap is running. In this case |
| 846 | * full==1 and a simple pte_clear is enough. See tlb.h. |
| 847 | */ |
| 848 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL |
| 849 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
Martin Schwidefsky | ebde765 | 2016-03-08 11:08:09 +0100 | [diff] [blame] | 850 | unsigned long addr, |
Martin Schwidefsky | ba8a922 | 2007-10-22 12:52:44 +0200 | [diff] [blame] | 851 | pte_t *ptep, int full) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | { |
Martin Schwidefsky | ebde765 | 2016-03-08 11:08:09 +0100 | [diff] [blame] | 853 | if (full) { |
| 854 | pte_t pte = *ptep; |
| 855 | *ptep = __pte(_PAGE_INVALID); |
| 856 | return pte; |
Martin Schwidefsky | d338363 | 2013-04-17 10:53:39 +0200 | [diff] [blame] | 857 | } |
Martin Schwidefsky | ebde765 | 2016-03-08 11:08:09 +0100 | [diff] [blame] | 858 | return ptep_xchg_lazy(mm, addr, ptep, __pte(_PAGE_INVALID)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | } |
| 860 | |
Martin Schwidefsky | ba8a922 | 2007-10-22 12:52:44 +0200 | [diff] [blame] | 861 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT |
Martin Schwidefsky | ebde765 | 2016-03-08 11:08:09 +0100 | [diff] [blame] | 862 | static inline void ptep_set_wrprotect(struct mm_struct *mm, |
| 863 | unsigned long addr, pte_t *ptep) |
Martin Schwidefsky | b2fa47e | 2011-05-23 10:24:40 +0200 | [diff] [blame] | 864 | { |
Martin Schwidefsky | b2fa47e | 2011-05-23 10:24:40 +0200 | [diff] [blame] | 865 | pte_t pte = *ptep; |
| 866 | |
Martin Schwidefsky | ebde765 | 2016-03-08 11:08:09 +0100 | [diff] [blame] | 867 | if (pte_write(pte)) |
| 868 | ptep_xchg_lazy(mm, addr, ptep, pte_wrprotect(pte)); |
Martin Schwidefsky | b2fa47e | 2011-05-23 10:24:40 +0200 | [diff] [blame] | 869 | } |
Martin Schwidefsky | ba8a922 | 2007-10-22 12:52:44 +0200 | [diff] [blame] | 870 | |
| 871 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
Martin Schwidefsky | b2fa47e | 2011-05-23 10:24:40 +0200 | [diff] [blame] | 872 | static inline int ptep_set_access_flags(struct vm_area_struct *vma, |
Martin Schwidefsky | ebde765 | 2016-03-08 11:08:09 +0100 | [diff] [blame] | 873 | unsigned long addr, pte_t *ptep, |
Martin Schwidefsky | b2fa47e | 2011-05-23 10:24:40 +0200 | [diff] [blame] | 874 | pte_t entry, int dirty) |
| 875 | { |
Martin Schwidefsky | ebde765 | 2016-03-08 11:08:09 +0100 | [diff] [blame] | 876 | if (pte_same(*ptep, entry)) |
Martin Schwidefsky | b2fa47e | 2011-05-23 10:24:40 +0200 | [diff] [blame] | 877 | return 0; |
Martin Schwidefsky | ebde765 | 2016-03-08 11:08:09 +0100 | [diff] [blame] | 878 | ptep_xchg_direct(vma->vm_mm, addr, ptep, entry); |
Martin Schwidefsky | b2fa47e | 2011-05-23 10:24:40 +0200 | [diff] [blame] | 879 | return 1; |
| 880 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | |
Martin Schwidefsky | 1e133ab | 2016-03-08 11:49:57 +0100 | [diff] [blame] | 882 | /* |
| 883 | * Additional functions to handle KVM guest page tables |
| 884 | */ |
| 885 | void ptep_set_pte_at(struct mm_struct *mm, unsigned long addr, |
| 886 | pte_t *ptep, pte_t entry); |
| 887 | void ptep_set_notify(struct mm_struct *mm, unsigned long addr, pte_t *ptep); |
| 888 | void ptep_notify(struct mm_struct *mm, unsigned long addr, pte_t *ptep); |
| 889 | void ptep_zap_unused(struct mm_struct *mm, unsigned long addr, |
| 890 | pte_t *ptep , int reset); |
| 891 | void ptep_zap_key(struct mm_struct *mm, unsigned long addr, pte_t *ptep); |
| 892 | |
| 893 | bool test_and_clear_guest_dirty(struct mm_struct *mm, unsigned long address); |
| 894 | int set_guest_storage_key(struct mm_struct *mm, unsigned long addr, |
| 895 | unsigned char key, bool nq); |
| 896 | unsigned char get_guest_storage_key(struct mm_struct *mm, unsigned long addr); |
Martin Schwidefsky | ebde765 | 2016-03-08 11:08:09 +0100 | [diff] [blame] | 897 | |
| 898 | /* |
| 899 | * Certain architectures need to do special things when PTEs |
| 900 | * within a page table are directly modified. Thus, the following |
| 901 | * hook is made available. |
| 902 | */ |
| 903 | static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, |
| 904 | pte_t *ptep, pte_t entry) |
| 905 | { |
| 906 | if (mm_has_pgste(mm)) |
Martin Schwidefsky | 1e133ab | 2016-03-08 11:49:57 +0100 | [diff] [blame] | 907 | ptep_set_pte_at(mm, addr, ptep, entry); |
Martin Schwidefsky | ebde765 | 2016-03-08 11:08:09 +0100 | [diff] [blame] | 908 | else |
| 909 | *ptep = entry; |
| 910 | } |
| 911 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | * Conversion functions: convert a page and protection to a page entry, |
| 914 | * and a page entry and page directory to the page they refer to. |
| 915 | */ |
| 916 | static inline pte_t mk_pte_phys(unsigned long physpage, pgprot_t pgprot) |
| 917 | { |
| 918 | pte_t __pte; |
| 919 | pte_val(__pte) = physpage + pgprot_val(pgprot); |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 920 | return pte_mkyoung(__pte); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | } |
| 922 | |
Heiko Carstens | 2dcea57 | 2006-09-29 01:58:41 -0700 | [diff] [blame] | 923 | static inline pte_t mk_pte(struct page *page, pgprot_t pgprot) |
| 924 | { |
Heiko Carstens | 0b2b6e1 | 2006-10-04 20:02:23 +0200 | [diff] [blame] | 925 | unsigned long physpage = page_to_phys(page); |
Martin Schwidefsky | abf09be | 2012-11-07 13:17:37 +0100 | [diff] [blame] | 926 | pte_t __pte = mk_pte_phys(physpage, pgprot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 928 | if (pte_write(__pte) && PageDirty(page)) |
| 929 | __pte = pte_mkdirty(__pte); |
Martin Schwidefsky | abf09be | 2012-11-07 13:17:37 +0100 | [diff] [blame] | 930 | return __pte; |
Heiko Carstens | 2dcea57 | 2006-09-29 01:58:41 -0700 | [diff] [blame] | 931 | } |
| 932 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1)) |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame] | 934 | #define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1)) |
| 935 | #define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) |
| 936 | #define pte_index(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE-1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame] | 938 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | #define pgd_offset_k(address) pgd_offset(&init_mm, address) |
| 940 | |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame] | 941 | #define pmd_deref(pmd) (pmd_val(pmd) & _SEGMENT_ENTRY_ORIGIN) |
| 942 | #define pud_deref(pud) (pud_val(pud) & _REGION_ENTRY_ORIGIN) |
Martin Schwidefsky | 5a216a2 | 2008-02-09 18:24:36 +0100 | [diff] [blame] | 943 | #define pgd_deref(pgd) (pgd_val(pgd) & _REGION_ENTRY_ORIGIN) |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame] | 944 | |
Martin Schwidefsky | 5a216a2 | 2008-02-09 18:24:36 +0100 | [diff] [blame] | 945 | static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address) |
| 946 | { |
Martin Schwidefsky | 6252d70 | 2008-02-09 18:24:37 +0100 | [diff] [blame] | 947 | pud_t *pud = (pud_t *) pgd; |
| 948 | if ((pgd_val(*pgd) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R2) |
| 949 | pud = (pud_t *) pgd_deref(*pgd); |
Martin Schwidefsky | 5a216a2 | 2008-02-09 18:24:36 +0100 | [diff] [blame] | 950 | return pud + pud_index(address); |
| 951 | } |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame] | 952 | |
| 953 | static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) |
| 954 | { |
Martin Schwidefsky | 6252d70 | 2008-02-09 18:24:37 +0100 | [diff] [blame] | 955 | pmd_t *pmd = (pmd_t *) pud; |
| 956 | if ((pud_val(*pud) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R3) |
| 957 | pmd = (pmd_t *) pud_deref(*pud); |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame] | 958 | return pmd + pmd_index(address); |
| 959 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame] | 961 | #define pfn_pte(pfn,pgprot) mk_pte_phys(__pa((pfn) << PAGE_SHIFT),(pgprot)) |
| 962 | #define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT) |
| 963 | #define pte_page(x) pfn_to_page(pte_pfn(x)) |
| 964 | |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 965 | #define pmd_page(pmd) pfn_to_page(pmd_pfn(pmd)) |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame] | 966 | |
| 967 | /* Find an entry in the lowest level page table.. */ |
| 968 | #define pte_offset(pmd, addr) ((pte_t *) pmd_deref(*(pmd)) + pte_index(addr)) |
| 969 | #define pte_offset_kernel(pmd, address) pte_offset(pmd,address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | #define pte_offset_map(pmd, address) pte_offset_kernel(pmd, address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | #define pte_unmap(pte) do { } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | |
Gerald Schaefer | 106c992 | 2013-04-29 15:07:23 -0700 | [diff] [blame] | 973 | #if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLB_PAGE) |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 974 | static inline unsigned long massage_pgprot_pmd(pgprot_t pgprot) |
| 975 | { |
Gerald Schaefer | d8e7a33 | 2012-10-25 17:42:50 +0200 | [diff] [blame] | 976 | /* |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 977 | * pgprot is PAGE_NONE, PAGE_READ, or PAGE_WRITE (see __Pxxx / __Sxxx) |
Gerald Schaefer | d8e7a33 | 2012-10-25 17:42:50 +0200 | [diff] [blame] | 978 | * Convert to segment table entry format. |
| 979 | */ |
| 980 | if (pgprot_val(pgprot) == pgprot_val(PAGE_NONE)) |
| 981 | return pgprot_val(SEGMENT_NONE); |
Martin Schwidefsky | e509861 | 2013-07-23 20:57:57 +0200 | [diff] [blame] | 982 | if (pgprot_val(pgprot) == pgprot_val(PAGE_READ)) |
| 983 | return pgprot_val(SEGMENT_READ); |
| 984 | return pgprot_val(SEGMENT_WRITE); |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 985 | } |
| 986 | |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 987 | static inline pmd_t pmd_wrprotect(pmd_t pmd) |
| 988 | { |
| 989 | pmd_val(pmd) &= ~_SEGMENT_ENTRY_WRITE; |
| 990 | pmd_val(pmd) |= _SEGMENT_ENTRY_PROTECT; |
| 991 | return pmd; |
| 992 | } |
| 993 | |
| 994 | static inline pmd_t pmd_mkwrite(pmd_t pmd) |
| 995 | { |
| 996 | pmd_val(pmd) |= _SEGMENT_ENTRY_WRITE; |
| 997 | if (pmd_large(pmd) && !(pmd_val(pmd) & _SEGMENT_ENTRY_DIRTY)) |
| 998 | return pmd; |
| 999 | pmd_val(pmd) &= ~_SEGMENT_ENTRY_PROTECT; |
| 1000 | return pmd; |
| 1001 | } |
| 1002 | |
| 1003 | static inline pmd_t pmd_mkclean(pmd_t pmd) |
| 1004 | { |
| 1005 | if (pmd_large(pmd)) { |
| 1006 | pmd_val(pmd) &= ~_SEGMENT_ENTRY_DIRTY; |
| 1007 | pmd_val(pmd) |= _SEGMENT_ENTRY_PROTECT; |
| 1008 | } |
| 1009 | return pmd; |
| 1010 | } |
| 1011 | |
| 1012 | static inline pmd_t pmd_mkdirty(pmd_t pmd) |
| 1013 | { |
| 1014 | if (pmd_large(pmd)) { |
Martin Schwidefsky | 5614dd9 | 2015-04-22 14:47:42 +0200 | [diff] [blame] | 1015 | pmd_val(pmd) |= _SEGMENT_ENTRY_DIRTY | |
| 1016 | _SEGMENT_ENTRY_SOFT_DIRTY; |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 1017 | if (pmd_val(pmd) & _SEGMENT_ENTRY_WRITE) |
| 1018 | pmd_val(pmd) &= ~_SEGMENT_ENTRY_PROTECT; |
| 1019 | } |
| 1020 | return pmd; |
| 1021 | } |
| 1022 | |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 1023 | static inline pmd_t pmd_mkyoung(pmd_t pmd) |
| 1024 | { |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 1025 | if (pmd_large(pmd)) { |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 1026 | pmd_val(pmd) |= _SEGMENT_ENTRY_YOUNG; |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 1027 | if (pmd_val(pmd) & _SEGMENT_ENTRY_READ) |
| 1028 | pmd_val(pmd) &= ~_SEGMENT_ENTRY_INVALID; |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 1029 | } |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 1030 | return pmd; |
| 1031 | } |
| 1032 | |
| 1033 | static inline pmd_t pmd_mkold(pmd_t pmd) |
| 1034 | { |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 1035 | if (pmd_large(pmd)) { |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 1036 | pmd_val(pmd) &= ~_SEGMENT_ENTRY_YOUNG; |
| 1037 | pmd_val(pmd) |= _SEGMENT_ENTRY_INVALID; |
| 1038 | } |
Martin Schwidefsky | 0944fe3 | 2013-07-23 22:11:42 +0200 | [diff] [blame] | 1039 | return pmd; |
| 1040 | } |
| 1041 | |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 1042 | static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) |
| 1043 | { |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 1044 | if (pmd_large(pmd)) { |
| 1045 | pmd_val(pmd) &= _SEGMENT_ENTRY_ORIGIN_LARGE | |
| 1046 | _SEGMENT_ENTRY_DIRTY | _SEGMENT_ENTRY_YOUNG | |
Kirill A. Shutemov | fecffad | 2016-01-15 16:53:24 -0800 | [diff] [blame] | 1047 | _SEGMENT_ENTRY_LARGE | _SEGMENT_ENTRY_SOFT_DIRTY; |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 1048 | pmd_val(pmd) |= massage_pgprot_pmd(newprot); |
| 1049 | if (!(pmd_val(pmd) & _SEGMENT_ENTRY_DIRTY)) |
| 1050 | pmd_val(pmd) |= _SEGMENT_ENTRY_PROTECT; |
| 1051 | if (!(pmd_val(pmd) & _SEGMENT_ENTRY_YOUNG)) |
| 1052 | pmd_val(pmd) |= _SEGMENT_ENTRY_INVALID; |
| 1053 | return pmd; |
| 1054 | } |
| 1055 | pmd_val(pmd) &= _SEGMENT_ENTRY_ORIGIN; |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 1056 | pmd_val(pmd) |= massage_pgprot_pmd(newprot); |
| 1057 | return pmd; |
| 1058 | } |
| 1059 | |
Gerald Schaefer | 106c992 | 2013-04-29 15:07:23 -0700 | [diff] [blame] | 1060 | static inline pmd_t mk_pmd_phys(unsigned long physpage, pgprot_t pgprot) |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 1061 | { |
Gerald Schaefer | 106c992 | 2013-04-29 15:07:23 -0700 | [diff] [blame] | 1062 | pmd_t __pmd; |
| 1063 | pmd_val(__pmd) = physpage + massage_pgprot_pmd(pgprot); |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 1064 | return __pmd; |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 1065 | } |
| 1066 | |
Gerald Schaefer | 106c992 | 2013-04-29 15:07:23 -0700 | [diff] [blame] | 1067 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE || CONFIG_HUGETLB_PAGE */ |
| 1068 | |
Martin Schwidefsky | 1b948d6 | 2014-04-03 13:55:01 +0200 | [diff] [blame] | 1069 | static inline void __pmdp_csp(pmd_t *pmdp) |
| 1070 | { |
| 1071 | register unsigned long reg2 asm("2") = pmd_val(*pmdp); |
| 1072 | register unsigned long reg3 asm("3") = pmd_val(*pmdp) | |
| 1073 | _SEGMENT_ENTRY_INVALID; |
| 1074 | register unsigned long reg4 asm("4") = ((unsigned long) pmdp) + 5; |
| 1075 | |
| 1076 | asm volatile( |
| 1077 | " csp %1,%3" |
| 1078 | : "=m" (*pmdp) |
| 1079 | : "d" (reg2), "d" (reg3), "d" (reg4), "m" (*pmdp) : "cc"); |
| 1080 | } |
| 1081 | |
| 1082 | static inline void __pmdp_idte(unsigned long address, pmd_t *pmdp) |
| 1083 | { |
| 1084 | unsigned long sto; |
| 1085 | |
| 1086 | sto = (unsigned long) pmdp - pmd_index(address) * sizeof(pmd_t); |
| 1087 | asm volatile( |
| 1088 | " .insn rrf,0xb98e0000,%2,%3,0,0" |
| 1089 | : "=m" (*pmdp) |
| 1090 | : "m" (*pmdp), "a" (sto), "a" ((address & HPAGE_MASK)) |
| 1091 | : "cc" ); |
| 1092 | } |
| 1093 | |
| 1094 | static inline void __pmdp_idte_local(unsigned long address, pmd_t *pmdp) |
| 1095 | { |
| 1096 | unsigned long sto; |
| 1097 | |
| 1098 | sto = (unsigned long) pmdp - pmd_index(address) * sizeof(pmd_t); |
| 1099 | asm volatile( |
| 1100 | " .insn rrf,0xb98e0000,%2,%3,0,1" |
| 1101 | : "=m" (*pmdp) |
| 1102 | : "m" (*pmdp), "a" (sto), "a" ((address & HPAGE_MASK)) |
| 1103 | : "cc" ); |
| 1104 | } |
| 1105 | |
Martin Schwidefsky | 227be79 | 2016-03-08 11:09:25 +0100 | [diff] [blame] | 1106 | pmd_t pmdp_xchg_direct(struct mm_struct *, unsigned long, pmd_t *, pmd_t); |
| 1107 | pmd_t pmdp_xchg_lazy(struct mm_struct *, unsigned long, pmd_t *, pmd_t); |
Martin Schwidefsky | 3eabaee | 2013-07-26 15:04:02 +0200 | [diff] [blame] | 1108 | |
Gerald Schaefer | 106c992 | 2013-04-29 15:07:23 -0700 | [diff] [blame] | 1109 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
| 1110 | |
| 1111 | #define __HAVE_ARCH_PGTABLE_DEPOSIT |
Martin Schwidefsky | 227be79 | 2016-03-08 11:09:25 +0100 | [diff] [blame] | 1112 | void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp, |
| 1113 | pgtable_t pgtable); |
Gerald Schaefer | 106c992 | 2013-04-29 15:07:23 -0700 | [diff] [blame] | 1114 | |
| 1115 | #define __HAVE_ARCH_PGTABLE_WITHDRAW |
Martin Schwidefsky | 227be79 | 2016-03-08 11:09:25 +0100 | [diff] [blame] | 1116 | pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp); |
| 1117 | |
| 1118 | #define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS |
| 1119 | static inline int pmdp_set_access_flags(struct vm_area_struct *vma, |
| 1120 | unsigned long addr, pmd_t *pmdp, |
| 1121 | pmd_t entry, int dirty) |
| 1122 | { |
| 1123 | VM_BUG_ON(addr & ~HPAGE_MASK); |
| 1124 | |
| 1125 | entry = pmd_mkyoung(entry); |
| 1126 | if (dirty) |
| 1127 | entry = pmd_mkdirty(entry); |
| 1128 | if (pmd_val(*pmdp) == pmd_val(entry)) |
| 1129 | return 0; |
| 1130 | pmdp_xchg_direct(vma->vm_mm, addr, pmdp, entry); |
| 1131 | return 1; |
| 1132 | } |
| 1133 | |
| 1134 | #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG |
| 1135 | static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma, |
| 1136 | unsigned long addr, pmd_t *pmdp) |
| 1137 | { |
| 1138 | pmd_t pmd = *pmdp; |
| 1139 | |
| 1140 | pmd = pmdp_xchg_direct(vma->vm_mm, addr, pmdp, pmd_mkold(pmd)); |
| 1141 | return pmd_young(pmd); |
| 1142 | } |
| 1143 | |
| 1144 | #define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH |
| 1145 | static inline int pmdp_clear_flush_young(struct vm_area_struct *vma, |
| 1146 | unsigned long addr, pmd_t *pmdp) |
| 1147 | { |
| 1148 | VM_BUG_ON(addr & ~HPAGE_MASK); |
| 1149 | return pmdp_test_and_clear_young(vma, addr, pmdp); |
| 1150 | } |
Gerald Schaefer | 106c992 | 2013-04-29 15:07:23 -0700 | [diff] [blame] | 1151 | |
Gerald Schaefer | 106c992 | 2013-04-29 15:07:23 -0700 | [diff] [blame] | 1152 | static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr, |
| 1153 | pmd_t *pmdp, pmd_t entry) |
| 1154 | { |
Gerald Schaefer | 106c992 | 2013-04-29 15:07:23 -0700 | [diff] [blame] | 1155 | *pmdp = entry; |
| 1156 | } |
| 1157 | |
| 1158 | static inline pmd_t pmd_mkhuge(pmd_t pmd) |
| 1159 | { |
| 1160 | pmd_val(pmd) |= _SEGMENT_ENTRY_LARGE; |
Martin Schwidefsky | 152125b | 2014-07-24 11:03:41 +0200 | [diff] [blame] | 1161 | pmd_val(pmd) |= _SEGMENT_ENTRY_YOUNG; |
| 1162 | pmd_val(pmd) |= _SEGMENT_ENTRY_PROTECT; |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 1163 | return pmd; |
| 1164 | } |
| 1165 | |
Aneesh Kumar K.V | 8809aa2 | 2015-06-24 16:57:44 -0700 | [diff] [blame] | 1166 | #define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR |
| 1167 | static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, |
Martin Schwidefsky | 227be79 | 2016-03-08 11:09:25 +0100 | [diff] [blame] | 1168 | unsigned long addr, pmd_t *pmdp) |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 1169 | { |
Martin Schwidefsky | 227be79 | 2016-03-08 11:09:25 +0100 | [diff] [blame] | 1170 | return pmdp_xchg_direct(mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_INVALID)); |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 1171 | } |
| 1172 | |
Aneesh Kumar K.V | 8809aa2 | 2015-06-24 16:57:44 -0700 | [diff] [blame] | 1173 | #define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR_FULL |
| 1174 | static inline pmd_t pmdp_huge_get_and_clear_full(struct mm_struct *mm, |
Martin Schwidefsky | 227be79 | 2016-03-08 11:09:25 +0100 | [diff] [blame] | 1175 | unsigned long addr, |
Aneesh Kumar K.V | 8809aa2 | 2015-06-24 16:57:44 -0700 | [diff] [blame] | 1176 | pmd_t *pmdp, int full) |
Martin Schwidefsky | fcbe08d6 | 2014-10-24 10:52:29 +0200 | [diff] [blame] | 1177 | { |
Martin Schwidefsky | 227be79 | 2016-03-08 11:09:25 +0100 | [diff] [blame] | 1178 | if (full) { |
| 1179 | pmd_t pmd = *pmdp; |
| 1180 | *pmdp = __pmd(_SEGMENT_ENTRY_INVALID); |
| 1181 | return pmd; |
| 1182 | } |
| 1183 | return pmdp_xchg_lazy(mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_INVALID)); |
Martin Schwidefsky | fcbe08d6 | 2014-10-24 10:52:29 +0200 | [diff] [blame] | 1184 | } |
| 1185 | |
Aneesh Kumar K.V | 8809aa2 | 2015-06-24 16:57:44 -0700 | [diff] [blame] | 1186 | #define __HAVE_ARCH_PMDP_HUGE_CLEAR_FLUSH |
| 1187 | static inline pmd_t pmdp_huge_clear_flush(struct vm_area_struct *vma, |
Martin Schwidefsky | 227be79 | 2016-03-08 11:09:25 +0100 | [diff] [blame] | 1188 | unsigned long addr, pmd_t *pmdp) |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 1189 | { |
Martin Schwidefsky | 227be79 | 2016-03-08 11:09:25 +0100 | [diff] [blame] | 1190 | return pmdp_huge_get_and_clear(vma->vm_mm, addr, pmdp); |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 1191 | } |
| 1192 | |
| 1193 | #define __HAVE_ARCH_PMDP_INVALIDATE |
| 1194 | static inline void pmdp_invalidate(struct vm_area_struct *vma, |
Martin Schwidefsky | 227be79 | 2016-03-08 11:09:25 +0100 | [diff] [blame] | 1195 | unsigned long addr, pmd_t *pmdp) |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 1196 | { |
Martin Schwidefsky | 227be79 | 2016-03-08 11:09:25 +0100 | [diff] [blame] | 1197 | pmdp_xchg_direct(vma->vm_mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_INVALID)); |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 1198 | } |
| 1199 | |
Gerald Schaefer | be32865 | 2013-01-21 16:48:07 +0100 | [diff] [blame] | 1200 | #define __HAVE_ARCH_PMDP_SET_WRPROTECT |
| 1201 | static inline void pmdp_set_wrprotect(struct mm_struct *mm, |
Martin Schwidefsky | 227be79 | 2016-03-08 11:09:25 +0100 | [diff] [blame] | 1202 | unsigned long addr, pmd_t *pmdp) |
Gerald Schaefer | be32865 | 2013-01-21 16:48:07 +0100 | [diff] [blame] | 1203 | { |
| 1204 | pmd_t pmd = *pmdp; |
| 1205 | |
Martin Schwidefsky | 227be79 | 2016-03-08 11:09:25 +0100 | [diff] [blame] | 1206 | if (pmd_write(pmd)) |
| 1207 | pmd = pmdp_xchg_lazy(mm, addr, pmdp, pmd_wrprotect(pmd)); |
Gerald Schaefer | be32865 | 2013-01-21 16:48:07 +0100 | [diff] [blame] | 1208 | } |
| 1209 | |
Aneesh Kumar K.V | f28b6ff | 2015-06-24 16:57:42 -0700 | [diff] [blame] | 1210 | static inline pmd_t pmdp_collapse_flush(struct vm_area_struct *vma, |
| 1211 | unsigned long address, |
| 1212 | pmd_t *pmdp) |
| 1213 | { |
Aneesh Kumar K.V | 8809aa2 | 2015-06-24 16:57:44 -0700 | [diff] [blame] | 1214 | return pmdp_huge_get_and_clear(vma->vm_mm, address, pmdp); |
Aneesh Kumar K.V | f28b6ff | 2015-06-24 16:57:42 -0700 | [diff] [blame] | 1215 | } |
| 1216 | #define pmdp_collapse_flush pmdp_collapse_flush |
| 1217 | |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 1218 | #define pfn_pmd(pfn, pgprot) mk_pmd_phys(__pa((pfn) << PAGE_SHIFT), (pgprot)) |
| 1219 | #define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot)) |
| 1220 | |
| 1221 | static inline int pmd_trans_huge(pmd_t pmd) |
| 1222 | { |
| 1223 | return pmd_val(pmd) & _SEGMENT_ENTRY_LARGE; |
| 1224 | } |
| 1225 | |
Hugh Dickins | fd8cfd3 | 2016-05-19 17:13:00 -0700 | [diff] [blame^] | 1226 | #define has_transparent_hugepage has_transparent_hugepage |
Gerald Schaefer | 1ae1c1d | 2012-10-08 16:30:24 -0700 | [diff] [blame] | 1227 | static inline int has_transparent_hugepage(void) |
| 1228 | { |
| 1229 | return MACHINE_HAS_HPAGE ? 1 : 0; |
| 1230 | } |
Gerald Schaefer | 75077af | 2012-10-08 16:30:15 -0700 | [diff] [blame] | 1231 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
| 1232 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | * 64 bit swap entry format: |
| 1235 | * A page-table entry has some bits we have to treat in a special way. |
Geert Uytterhoeven | 4e0a641 | 2015-05-21 14:00:47 +0200 | [diff] [blame] | 1236 | * Bits 52 and bit 55 have to be zero, otherwise a specification |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | * exception will occur instead of a page translation exception. The |
Geert Uytterhoeven | 4e0a641 | 2015-05-21 14:00:47 +0200 | [diff] [blame] | 1238 | * specification exception has the bad habit not to store necessary |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | * information in the lowcore. |
Martin Schwidefsky | a1c843b | 2015-04-22 13:55:59 +0200 | [diff] [blame] | 1240 | * Bits 54 and 63 are used to indicate the page type. |
| 1241 | * A swap pte is indicated by bit pattern (pte & 0x201) == 0x200 |
| 1242 | * This leaves the bits 0-51 and bits 56-62 to store type and offset. |
| 1243 | * We use the 5 bits from 57-61 for the type and the 52 bits from 0-51 |
| 1244 | * for the offset. |
| 1245 | * | offset |01100|type |00| |
| 1246 | * |0000000000111111111122222222223333333333444444444455|55555|55566|66| |
| 1247 | * |0123456789012345678901234567890123456789012345678901|23456|78901|23| |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | */ |
Heiko Carstens | 5a79859 | 2015-02-12 13:08:27 +0100 | [diff] [blame] | 1249 | |
Martin Schwidefsky | a1c843b | 2015-04-22 13:55:59 +0200 | [diff] [blame] | 1250 | #define __SWP_OFFSET_MASK ((1UL << 52) - 1) |
| 1251 | #define __SWP_OFFSET_SHIFT 12 |
| 1252 | #define __SWP_TYPE_MASK ((1UL << 5) - 1) |
| 1253 | #define __SWP_TYPE_SHIFT 2 |
Heiko Carstens | 5a79859 | 2015-02-12 13:08:27 +0100 | [diff] [blame] | 1254 | |
Adrian Bunk | 4448aaf | 2005-11-08 21:34:42 -0800 | [diff] [blame] | 1255 | static inline pte_t mk_swap_pte(unsigned long type, unsigned long offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | { |
| 1257 | pte_t pte; |
Martin Schwidefsky | a1c843b | 2015-04-22 13:55:59 +0200 | [diff] [blame] | 1258 | |
| 1259 | pte_val(pte) = _PAGE_INVALID | _PAGE_PROTECT; |
| 1260 | pte_val(pte) |= (offset & __SWP_OFFSET_MASK) << __SWP_OFFSET_SHIFT; |
| 1261 | pte_val(pte) |= (type & __SWP_TYPE_MASK) << __SWP_TYPE_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | return pte; |
| 1263 | } |
| 1264 | |
Martin Schwidefsky | a1c843b | 2015-04-22 13:55:59 +0200 | [diff] [blame] | 1265 | static inline unsigned long __swp_type(swp_entry_t entry) |
| 1266 | { |
| 1267 | return (entry.val >> __SWP_TYPE_SHIFT) & __SWP_TYPE_MASK; |
| 1268 | } |
| 1269 | |
| 1270 | static inline unsigned long __swp_offset(swp_entry_t entry) |
| 1271 | { |
| 1272 | return (entry.val >> __SWP_OFFSET_SHIFT) & __SWP_OFFSET_MASK; |
| 1273 | } |
| 1274 | |
| 1275 | static inline swp_entry_t __swp_entry(unsigned long type, unsigned long offset) |
| 1276 | { |
| 1277 | return (swp_entry_t) { pte_val(mk_swap_pte(type, offset)) }; |
| 1278 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | |
| 1280 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) |
| 1281 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) |
| 1282 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | #endif /* !__ASSEMBLY__ */ |
| 1284 | |
| 1285 | #define kern_addr_valid(addr) (1) |
| 1286 | |
Heiko Carstens | 17f3458 | 2008-04-30 13:38:47 +0200 | [diff] [blame] | 1287 | extern int vmem_add_mapping(unsigned long start, unsigned long size); |
| 1288 | extern int vmem_remove_mapping(unsigned long start, unsigned long size); |
Carsten Otte | 402b086 | 2008-03-25 18:47:10 +0100 | [diff] [blame] | 1289 | extern int s390_enable_sie(void); |
Dominik Dingel | 3ac8e38 | 2014-10-23 12:09:17 +0200 | [diff] [blame] | 1290 | extern int s390_enable_skey(void); |
Dominik Dingel | a13cff3 | 2014-10-23 12:07:14 +0200 | [diff] [blame] | 1291 | extern void s390_reset_cmma(struct mm_struct *mm); |
Heiko Carstens | f4eb07c | 2006-12-08 15:56:07 +0100 | [diff] [blame] | 1292 | |
Martin Schwidefsky | 1f6b83e | 2015-01-14 17:51:17 +0100 | [diff] [blame] | 1293 | /* s390 has a private copy of get unmapped area to deal with cache synonyms */ |
| 1294 | #define HAVE_ARCH_UNMAPPED_AREA |
| 1295 | #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN |
| 1296 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | /* |
| 1298 | * No page table caches to initialise |
| 1299 | */ |
Heiko Carstens | 765a0ca | 2013-03-23 10:29:01 +0100 | [diff] [blame] | 1300 | static inline void pgtable_cache_init(void) { } |
| 1301 | static inline void check_pgt_cache(void) { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | #include <asm-generic/pgtable.h> |
| 1304 | |
| 1305 | #endif /* _S390_PAGE_H */ |