diff options
Diffstat (limited to 'arch/powerpc/mm/hugetlbpage.c')
-rw-r--r-- | arch/powerpc/mm/hugetlbpage.c | 102 |
1 files changed, 51 insertions, 51 deletions
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index 33b3461d91e8..e9bfbccd975d 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -19,7 +19,6 @@ #include <linux/swap.h> #include <linux/swapops.h> #include <linux/kmemleak.h> -#include <asm/pgtable.h> #include <asm/pgalloc.h> #include <asm/tlb.h> #include <asm/setup.h> @@ -30,7 +29,8 @@ bool hugetlb_disabled = false; #define hugepd_none(hpd) (hpd_val(hpd) == 0) -#define PTE_T_ORDER (__builtin_ffs(sizeof(pte_t)) - __builtin_ffs(sizeof(void *))) +#define PTE_T_ORDER (__builtin_ffs(sizeof(pte_basic_t)) - \ + __builtin_ffs(sizeof(void *))) pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr, unsigned long sz) { @@ -53,24 +53,17 @@ static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp, if (pshift >= pdshift) { cachep = PGT_CACHE(PTE_T_ORDER); num_hugepd = 1 << (pshift - pdshift); - new = NULL; - } else if (IS_ENABLED(CONFIG_PPC_8xx)) { - cachep = NULL; - num_hugepd = 1; - new = pte_alloc_one(mm); } else { cachep = PGT_CACHE(pdshift - pshift); num_hugepd = 1; - new = NULL; } - if (!cachep && !new) { + if (!cachep) { WARN_ONCE(1, "No page table cache created for hugetlb tables"); return -ENOMEM; } - if (cachep) - new = kmem_cache_alloc(cachep, pgtable_gfp_flags(mm, GFP_KERNEL)); + new = kmem_cache_alloc(cachep, pgtable_gfp_flags(mm, GFP_KERNEL)); BUG_ON(pshift > HUGEPD_SHIFT_MASK); BUG_ON((unsigned long)new & HUGEPD_SHIFT_MASK); @@ -101,10 +94,7 @@ static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp, if (i < num_hugepd) { for (i = i - 1 ; i >= 0; i--, hpdp--) *hpdp = __hugepd(0); - if (cachep) - kmem_cache_free(cachep, new); - else - pte_free(mm, new); + kmem_cache_free(cachep, new); } else { kmemleak_ignore(new); } @@ -119,6 +109,7 @@ static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp, pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz) { pgd_t *pg; + p4d_t *p4; pud_t *pu; pmd_t *pm; hugepd_t *hpdp = NULL; @@ -128,20 +119,21 @@ pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz addr &= ~(sz-1); pg = pgd_offset(mm, addr); + p4 = p4d_offset(pg, addr); #ifdef CONFIG_PPC_BOOK3S_64 if (pshift == PGDIR_SHIFT) /* 16GB huge page */ - return (pte_t *) pg; + return (pte_t *) p4; else if (pshift > PUD_SHIFT) { /* * We need to use hugepd table */ ptl = &mm->page_table_lock; - hpdp = (hugepd_t *)pg; + hpdp = (hugepd_t *)p4; } else { pdshift = PUD_SHIFT; - pu = pud_alloc(mm, pg, addr); + pu = pud_alloc(mm, p4, addr); if (!pu) return NULL; if (pshift == PUD_SHIFT) @@ -166,10 +158,10 @@ pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz #else if (pshift >= PGDIR_SHIFT) { ptl = &mm->page_table_lock; - hpdp = (hugepd_t *)pg; + hpdp = (hugepd_t *)p4; } else { pdshift = PUD_SHIFT; - pu = pud_alloc(mm, pg, addr); + pu = pud_alloc(mm, p4, addr); if (!pu) return NULL; if (pshift >= PUD_SHIFT) { @@ -188,6 +180,9 @@ pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz if (!hpdp) return NULL; + if (IS_ENABLED(CONFIG_PPC_8xx) && sz == SZ_512K) + return pte_alloc_map(mm, (pmd_t *)hpdp, addr); + BUG_ON(!hugepd_none(*hpdp) && !hugepd_ok(*hpdp)); if (hugepd_none(*hpdp) && __hugepte_alloc(mm, hpdp, addr, @@ -253,7 +248,7 @@ int __init alloc_bootmem_huge_page(struct hstate *h) struct hugepd_freelist { struct rcu_head rcu; unsigned int index; - void *ptes[0]; + void *ptes[]; }; static DEFINE_PER_CPU(struct hugepd_freelist *, hugepd_freelist_cur); @@ -330,13 +325,20 @@ static void free_hugepd_range(struct mmu_gather *tlb, hugepd_t *hpdp, int pdshif if (shift >= pdshift) hugepd_free(tlb, hugepte); - else if (IS_ENABLED(CONFIG_PPC_8xx)) - pgtable_free_tlb(tlb, hugepte, 0); else pgtable_free_tlb(tlb, hugepte, get_hugepd_cache_index(pdshift - shift)); } +static void hugetlb_free_pte_range(struct mmu_gather *tlb, pmd_t *pmd, unsigned long addr) +{ + pgtable_t token = pmd_pgtable(*pmd); + + pmd_clear(pmd); + pte_free_tlb(tlb, token, addr); + mm_dec_nr_ptes(tlb->mm); +} + static void hugetlb_free_pmd_range(struct mmu_gather *tlb, pud_t *pud, unsigned long addr, unsigned long end, unsigned long floor, unsigned long ceiling) @@ -352,11 +354,17 @@ static void hugetlb_free_pmd_range(struct mmu_gather *tlb, pud_t *pud, pmd = pmd_offset(pud, addr); next = pmd_addr_end(addr, end); if (!is_hugepd(__hugepd(pmd_val(*pmd)))) { + if (pmd_none_or_clear_bad(pmd)) + continue; + /* * if it is not hugepd pointer, we should already find * it cleared. */ - WARN_ON(!pmd_none_or_clear_bad(pmd)); + WARN_ON(!IS_ENABLED(CONFIG_PPC_8xx)); + + hugetlb_free_pte_range(tlb, pmd, addr); + continue; } /* @@ -390,7 +398,7 @@ static void hugetlb_free_pmd_range(struct mmu_gather *tlb, pud_t *pud, mm_dec_nr_pmds(tlb->mm); } -static void hugetlb_free_pud_range(struct mmu_gather *tlb, pgd_t *pgd, +static void hugetlb_free_pud_range(struct mmu_gather *tlb, p4d_t *p4d, unsigned long addr, unsigned long end, unsigned long floor, unsigned long ceiling) { @@ -400,7 +408,7 @@ static void hugetlb_free_pud_range(struct mmu_gather *tlb, pgd_t *pgd, start = addr; do { - pud = pud_offset(pgd, addr); + pud = pud_offset(p4d, addr); next = pud_addr_end(addr, end); if (!is_hugepd(__hugepd(pud_val(*pud)))) { if (pud_none_or_clear_bad(pud)) @@ -435,8 +443,8 @@ static void hugetlb_free_pud_range(struct mmu_gather *tlb, pgd_t *pgd, if (end - 1 > ceiling - 1) return; - pud = pud_offset(pgd, start); - pgd_clear(pgd); + pud = pud_offset(p4d, start); + p4d_clear(p4d); pud_free_tlb(tlb, pud, start); mm_dec_nr_puds(tlb->mm); } @@ -449,6 +457,7 @@ void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long floor, unsigned long ceiling) { pgd_t *pgd; + p4d_t *p4d; unsigned long next; /* @@ -471,10 +480,11 @@ void hugetlb_free_pgd_range(struct mmu_gather *tlb, do { next = pgd_addr_end(addr, end); pgd = pgd_offset(tlb->mm, addr); + p4d = p4d_offset(pgd, addr); if (!is_hugepd(__hugepd(pgd_val(*pgd)))) { - if (pgd_none_or_clear_bad(pgd)) + if (p4d_none_or_clear_bad(p4d)) continue; - hugetlb_free_pud_range(tlb, pgd, addr, next, floor, ceiling); + hugetlb_free_pud_range(tlb, p4d, addr, next, floor, ceiling); } else { unsigned long more; /* @@ -487,7 +497,7 @@ void hugetlb_free_pgd_range(struct mmu_gather *tlb, if (more > next) next = more; - free_hugepd_range(tlb, (hugepd_t *)pgd, PGDIR_SHIFT, + free_hugepd_range(tlb, (hugepd_t *)p4d, PGDIR_SHIFT, addr, next, floor, ceiling); } } while (addr = next, addr != end); @@ -558,7 +568,7 @@ unsigned long vma_mmu_pagesize(struct vm_area_struct *vma) return vma_kernel_pagesize(vma); } -static int __init add_huge_page_size(unsigned long long size) +bool __init arch_hugetlb_valid_size(unsigned long size) { int shift = __ffs(size); int mmu_psize; @@ -566,37 +576,27 @@ static int __init add_huge_page_size(unsigned long long size) /* Check that it is a page size supported by the hardware and * that it fits within pagetable and slice limits. */ if (size <= PAGE_SIZE || !is_power_of_2(size)) - return -EINVAL; + return false; mmu_psize = check_and_get_huge_psize(shift); if (mmu_psize < 0) - return -EINVAL; + return false; BUG_ON(mmu_psize_defs[mmu_psize].shift != shift); - /* Return if huge page size has already been setup */ - if (size_to_hstate(size)) - return 0; - - hugetlb_add_hstate(shift - PAGE_SHIFT); - - return 0; + return true; } -static int __init hugepage_setup_sz(char *str) +static int __init add_huge_page_size(unsigned long long size) { - unsigned long long size; - - size = memparse(str, &str); + int shift = __ffs(size); - if (add_huge_page_size(size) != 0) { - hugetlb_bad_size(); - pr_err("Invalid huge page size specified(%llu)\n", size); - } + if (!arch_hugetlb_valid_size((unsigned long)size)) + return -EINVAL; - return 1; + hugetlb_add_hstate(shift - PAGE_SHIFT); + return 0; } -__setup("hugepagesz=", hugepage_setup_sz); static int __init hugetlbpage_init(void) { |