| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Aneesh Kumar K.V | 561 | 84.36% | 17 | 60.71% |
| Reza Arbab | 24 | 3.61% | 1 | 3.57% |
| Ram Pai | 23 | 3.46% | 1 | 3.57% |
| Benjamin Herrenschmidt | 21 | 3.16% | 1 | 3.57% |
| Michael Ellerman | 15 | 2.26% | 3 | 10.71% |
| Balbir Singh | 12 | 1.80% | 1 | 3.57% |
| Christophe Leroy | 5 | 0.75% | 2 | 7.14% |
| Nicholas Piggin | 3 | 0.45% | 1 | 3.57% |
| Greg Kroah-Hartman | 1 | 0.15% | 1 | 3.57% |
| Total | 665 | 28 |
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_POWERPC_BOOK3S_64_HASH_H #define _ASM_POWERPC_BOOK3S_64_HASH_H #ifdef __KERNEL__ #include <asm/asm-const.h> /* * Common bits between 4K and 64K pages in a linux-style PTE. * Additional bits may be defined in pgtable-hash64-*.h * */ #define H_PTE_NONE_MASK _PAGE_HPTEFLAGS #ifdef CONFIG_PPC_64K_PAGES #include <asm/book3s/64/hash-64k.h> #else #include <asm/book3s/64/hash-4k.h> #endif /* Bits to set in a PMD/PUD/PGD entry valid bit*/ #define HASH_PMD_VAL_BITS (0x8000000000000000UL) #define HASH_PUD_VAL_BITS (0x8000000000000000UL) #define HASH_PGD_VAL_BITS (0x8000000000000000UL) /* * Size of EA range mapped by our pagetables. */ #define H_PGTABLE_EADDR_SIZE (H_PTE_INDEX_SIZE + H_PMD_INDEX_SIZE + \ H_PUD_INDEX_SIZE + H_PGD_INDEX_SIZE + PAGE_SHIFT) #define H_PGTABLE_RANGE (ASM_CONST(1) << H_PGTABLE_EADDR_SIZE) /* * We store the slot details in the second half of page table. * Increase the pud level table so that hugetlb ptes can be stored * at pud level. */ #if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_PPC_64K_PAGES) #define H_PUD_CACHE_INDEX (H_PUD_INDEX_SIZE + 1) #else #define H_PUD_CACHE_INDEX (H_PUD_INDEX_SIZE) #endif /* * Define the address range of the kernel non-linear virtual area */ #define H_KERN_VIRT_START ASM_CONST(0xD000000000000000) #define H_KERN_VIRT_SIZE ASM_CONST(0x0000400000000000) /* 64T */ /* * The vmalloc space starts at the beginning of that region, and * occupies half of it on hash CPUs and a quarter of it on Book3E * (we keep a quarter for the virtual memmap) */ #define H_VMALLOC_START H_KERN_VIRT_START #define H_VMALLOC_SIZE ASM_CONST(0x380000000000) /* 56T */ #define H_VMALLOC_END (H_VMALLOC_START + H_VMALLOC_SIZE) #define H_KERN_IO_START H_VMALLOC_END /* * Region IDs */ #define REGION_SHIFT 60UL #define REGION_MASK (0xfUL << REGION_SHIFT) #define REGION_ID(ea) (((unsigned long)(ea)) >> REGION_SHIFT) #define VMALLOC_REGION_ID (REGION_ID(H_VMALLOC_START)) #define KERNEL_REGION_ID (REGION_ID(PAGE_OFFSET)) #define VMEMMAP_REGION_ID (0xfUL) /* Server only */ #define USER_REGION_ID (0UL) /* * Defines the address of the vmemap area, in its own region on * hash table CPUs. */ #define H_VMEMMAP_BASE (VMEMMAP_REGION_ID << REGION_SHIFT) #ifdef CONFIG_PPC_MM_SLICES #define HAVE_ARCH_UNMAPPED_AREA #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN #endif /* CONFIG_PPC_MM_SLICES */ /* PTEIDX nibble */ #define _PTEIDX_SECONDARY 0x8 #define _PTEIDX_GROUP_IX 0x7 #define H_PMD_BAD_BITS (PTE_TABLE_SIZE-1) #define H_PUD_BAD_BITS (PMD_TABLE_SIZE-1) #ifndef __ASSEMBLY__ #define hash__pmd_bad(pmd) (pmd_val(pmd) & H_PMD_BAD_BITS) #define hash__pud_bad(pud) (pud_val(pud) & H_PUD_BAD_BITS) static inline int hash__pgd_bad(pgd_t pgd) { return (pgd_val(pgd) == 0); } #ifdef CONFIG_STRICT_KERNEL_RWX extern void hash__mark_rodata_ro(void); extern void hash__mark_initmem_nx(void); #endif extern void hpte_need_flush(struct mm_struct *mm, unsigned long addr, pte_t *ptep, unsigned long pte, int huge); extern unsigned long htab_convert_pte_flags(unsigned long pteflags); /* Atomic PTE updates */ static inline unsigned long hash__pte_update(struct mm_struct *mm, unsigned long addr, pte_t *ptep, unsigned long clr, unsigned long set, int huge) { __be64 old_be, tmp_be; unsigned long old; __asm__ __volatile__( "1: ldarx %0,0,%3 # pte_update\n\ and. %1,%0,%6\n\ bne- 1b \n\ andc %1,%0,%4 \n\ or %1,%1,%7\n\ stdcx. %1,0,%3 \n\ bne- 1b" : "=&r" (old_be), "=&r" (tmp_be), "=m" (*ptep) : "r" (ptep), "r" (cpu_to_be64(clr)), "m" (*ptep), "r" (cpu_to_be64(H_PAGE_BUSY)), "r" (cpu_to_be64(set)) : "cc" ); /* huge pages use the old page table lock */ if (!huge) assert_pte_locked(mm, addr); old = be64_to_cpu(old_be); if (old & H_PAGE_HASHPTE) hpte_need_flush(mm, addr, ptep, old, huge); return old; } /* Set the dirty and/or accessed bits atomically in a linux PTE, this * function doesn't need to flush the hash entry */ static inline void hash__ptep_set_access_flags(pte_t *ptep, pte_t entry) { __be64 old, tmp, val, mask; mask = cpu_to_be64(_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_READ | _PAGE_WRITE | _PAGE_EXEC | _PAGE_SOFT_DIRTY); val = pte_raw(entry) & mask; __asm__ __volatile__( "1: ldarx %0,0,%4\n\ and. %1,%0,%6\n\ bne- 1b \n\ or %0,%3,%0\n\ stdcx. %0,0,%4\n\ bne- 1b" :"=&r" (old), "=&r" (tmp), "=m" (*ptep) :"r" (val), "r" (ptep), "m" (*ptep), "r" (cpu_to_be64(H_PAGE_BUSY)) :"cc"); } static inline int hash__pte_same(pte_t pte_a, pte_t pte_b) { return (((pte_raw(pte_a) ^ pte_raw(pte_b)) & ~cpu_to_be64(_PAGE_HPTEFLAGS)) == 0); } static inline int hash__pte_none(pte_t pte) { return (pte_val(pte) & ~H_PTE_NONE_MASK) == 0; } unsigned long pte_get_hash_gslot(unsigned long vpn, unsigned long shift, int ssize, real_pte_t rpte, unsigned int subpg_index); /* This low level function performs the actual PTE insertion * Setting the PTE depends on the MMU type and other factors. It's * an horrible mess that I'm not going to try to clean up now but * I'm keeping it in one place rather than spread around */ static inline void hash__set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte, int percpu) { /* * Anything else just stores the PTE normally. That covers all 64-bit * cases, and 32-bit non-hash with 32-bit PTEs. */ *ptep = pte; } #ifdef CONFIG_TRANSPARENT_HUGEPAGE extern void hpte_do_hugepage_flush(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp, unsigned long old_pmd); #else static inline void hpte_do_hugepage_flush(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp, unsigned long old_pmd) { WARN(1, "%s called with THP disabled\n", __func__); } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ int hash__map_kernel_page(unsigned long ea, unsigned long pa, pgprot_t prot); extern int __meminit hash__vmemmap_create_mapping(unsigned long start, unsigned long page_size, unsigned long phys); extern void hash__vmemmap_remove_mapping(unsigned long start, unsigned long page_size); int hash__create_section_mapping(unsigned long start, unsigned long end, int nid); int hash__remove_section_mapping(unsigned long start, unsigned long end); #endif /* !__ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_BOOK3S_64_HASH_H */
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