diff options
Diffstat (limited to 'arch/ppc64/mm')
| -rw-r--r-- | arch/ppc64/mm/hash_low.S | 4 | ||||
| -rw-r--r-- | arch/ppc64/mm/hash_native.c | 3 | ||||
| -rw-r--r-- | arch/ppc64/mm/hash_utils.c | 4 | ||||
| -rw-r--r-- | arch/ppc64/mm/hugetlbpage.c | 388 | ||||
| -rw-r--r-- | arch/ppc64/mm/imalloc.c | 2 | ||||
| -rw-r--r-- | arch/ppc64/mm/init.c | 96 | ||||
| -rw-r--r-- | arch/ppc64/mm/numa.c | 2 | ||||
| -rw-r--r-- | arch/ppc64/mm/slb_low.S | 25 | ||||
| -rw-r--r-- | arch/ppc64/mm/tlb.c | 95 |
9 files changed, 340 insertions, 279 deletions
diff --git a/arch/ppc64/mm/hash_low.S b/arch/ppc64/mm/hash_low.S index fbff24827ae..35eb49e1b89 100644 --- a/arch/ppc64/mm/hash_low.S +++ b/arch/ppc64/mm/hash_low.S @@ -129,12 +129,10 @@ _GLOBAL(__hash_page) * code rather than call a C function...) */ BEGIN_FTR_SECTION -BEGIN_FTR_SECTION mr r4,r30 mr r5,r7 bl .hash_page_do_lazy_icache -END_FTR_SECTION_IFSET(CPU_FTR_NOEXECUTE) -END_FTR_SECTION_IFCLR(CPU_FTR_COHERENT_ICACHE) +END_FTR_SECTION(CPU_FTR_NOEXECUTE|CPU_FTR_COHERENT_ICACHE, CPU_FTR_NOEXECUTE) /* At this point, r3 contains new PP bits, save them in * place of "access" in the param area (sic) diff --git a/arch/ppc64/mm/hash_native.c b/arch/ppc64/mm/hash_native.c index a6abd3a979b..7626bb59954 100644 --- a/arch/ppc64/mm/hash_native.c +++ b/arch/ppc64/mm/hash_native.c @@ -51,7 +51,6 @@ long native_hpte_insert(unsigned long hpte_group, unsigned long va, unsigned long prpn, unsigned long vflags, unsigned long rflags) { - unsigned long arpn = physRpn_to_absRpn(prpn); hpte_t *hptep = htab_address + hpte_group; unsigned long hpte_v, hpte_r; int i; @@ -74,7 +73,7 @@ long native_hpte_insert(unsigned long hpte_group, unsigned long va, hpte_v = (va >> 23) << HPTE_V_AVPN_SHIFT | vflags | HPTE_V_VALID; if (vflags & HPTE_V_LARGE) va &= ~(1UL << HPTE_V_AVPN_SHIFT); - hpte_r = (arpn << HPTE_R_RPN_SHIFT) | rflags; + hpte_r = (prpn << HPTE_R_RPN_SHIFT) | rflags; hptep->r = hpte_r; /* Guarantee the second dword is visible before the valid bit */ diff --git a/arch/ppc64/mm/hash_utils.c b/arch/ppc64/mm/hash_utils.c index 623b5d130c3..09475c8edf7 100644 --- a/arch/ppc64/mm/hash_utils.c +++ b/arch/ppc64/mm/hash_utils.c @@ -210,7 +210,7 @@ void __init htab_initialize(void) /* create bolted the linear mapping in the hash table */ for (i=0; i < lmb.memory.cnt; i++) { - base = lmb.memory.region[i].physbase + KERNELBASE; + base = lmb.memory.region[i].base + KERNELBASE; size = lmb.memory.region[i].size; DBG("creating mapping for region: %lx : %lx\n", base, size); @@ -302,7 +302,7 @@ int hash_page(unsigned long ea, unsigned long access, unsigned long trap) int local = 0; cpumask_t tmp; - if ((ea & ~REGION_MASK) > EADDR_MASK) + if ((ea & ~REGION_MASK) >= PGTABLE_RANGE) return 1; switch (REGION_ID(ea)) { diff --git a/arch/ppc64/mm/hugetlbpage.c b/arch/ppc64/mm/hugetlbpage.c index f9524602818..e7833c80eb6 100644 --- a/arch/ppc64/mm/hugetlbpage.c +++ b/arch/ppc64/mm/hugetlbpage.c @@ -27,124 +27,94 @@ #include <linux/sysctl.h> -#define HUGEPGDIR_SHIFT (HPAGE_SHIFT + PAGE_SHIFT - 3) -#define HUGEPGDIR_SIZE (1UL << HUGEPGDIR_SHIFT) -#define HUGEPGDIR_MASK (~(HUGEPGDIR_SIZE-1)) +#define NUM_LOW_AREAS (0x100000000UL >> SID_SHIFT) +#define NUM_HIGH_AREAS (PGTABLE_RANGE >> HTLB_AREA_SHIFT) -#define HUGEPTE_INDEX_SIZE 9 -#define HUGEPGD_INDEX_SIZE 10 - -#define PTRS_PER_HUGEPTE (1 << HUGEPTE_INDEX_SIZE) -#define PTRS_PER_HUGEPGD (1 << HUGEPGD_INDEX_SIZE) - -static inline int hugepgd_index(unsigned long addr) -{ - return (addr & ~REGION_MASK) >> HUGEPGDIR_SHIFT; -} - -static pud_t *hugepgd_offset(struct mm_struct *mm, unsigned long addr) +/* Modelled after find_linux_pte() */ +pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr) { - int index; + pgd_t *pg; + pud_t *pu; + pmd_t *pm; + pte_t *pt; - if (! mm->context.huge_pgdir) - return NULL; + BUG_ON(! in_hugepage_area(mm->context, addr)); + addr &= HPAGE_MASK; + + pg = pgd_offset(mm, addr); + if (!pgd_none(*pg)) { + pu = pud_offset(pg, addr); + if (!pud_none(*pu)) { + pm = pmd_offset(pu, addr); + pt = (pte_t *)pm; + BUG_ON(!pmd_none(*pm) + && !(pte_present(*pt) && pte_huge(*pt))); + return pt; + } + } - index = hugepgd_index(addr); - BUG_ON(index >= PTRS_PER_HUGEPGD); - return (pud_t *)(mm->context.huge_pgdir + index); + return NULL; } -static inline pte_t *hugepte_offset(pud_t *dir, unsigned long addr) +pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr) { - int index; - - if (pud_none(*dir)) - return NULL; + pgd_t *pg; + pud_t *pu; + pmd_t *pm; + pte_t *pt; - index = (addr >> HPAGE_SHIFT) % PTRS_PER_HUGEPTE; - return (pte_t *)pud_page(*dir) + index; -} - -static pud_t *hugepgd_alloc(struct mm_struct *mm, unsigned long addr) -{ BUG_ON(! in_hugepage_area(mm->context, addr)); - if (! mm->context.huge_pgdir) { - pgd_t *new; - spin_unlock(&mm->page_table_lock); - /* Don't use pgd_alloc(), because we want __GFP_REPEAT */ - new = kmem_cache_alloc(zero_cache, GFP_KERNEL | __GFP_REPEAT); - BUG_ON(memcmp(new, empty_zero_page, PAGE_SIZE)); - spin_lock(&mm->page_table_lock); + addr &= HPAGE_MASK; - /* - * Because we dropped the lock, we should re-check the - * entry, as somebody else could have populated it.. - */ - if (mm->context.huge_pgdir) - pgd_free(new); - else - mm->context.huge_pgdir = new; - } - return hugepgd_offset(mm, addr); -} + pg = pgd_offset(mm, addr); + pu = pud_alloc(mm, pg, addr); -static pte_t *hugepte_alloc(struct mm_struct *mm, pud_t *dir, unsigned long addr) -{ - if (! pud_present(*dir)) { - pte_t *new; - - spin_unlock(&mm->page_table_lock); - new = kmem_cache_alloc(zero_cache, GFP_KERNEL | __GFP_REPEAT); - BUG_ON(memcmp(new, empty_zero_page, PAGE_SIZE)); - spin_lock(&mm->page_table_lock); - /* - * Because we dropped the lock, we should re-check the - * entry, as somebody else could have populated it.. - */ - if (pud_present(*dir)) { - if (new) - kmem_cache_free(zero_cache, new); - } else { - struct page *ptepage; - - if (! new) - return NULL; - ptepage = virt_to_page(new); - ptepage->mapping = (void *) mm; - ptepage->index = addr & HUGEPGDIR_MASK; - pud_populate(mm, dir, new); + if (pu) { + pm = pmd_alloc(mm, pu, addr); + if (pm) { + pt = (pte_t *)pm; + BUG_ON(!pmd_none(*pm) + && !(pte_present(*pt) && pte_huge(*pt))); + return pt; } } - return hugepte_offset(dir, addr); + return NULL; } -pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr) -{ - pud_t *pud; +#define HUGEPTE_BATCH_SIZE (HPAGE_SIZE / PMD_SIZE) - BUG_ON(! in_hugepage_area(mm->context, addr)); +void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pte) +{ + int i; - pud = hugepgd_offset(mm, addr); - if (! pud) - return NULL; + if (pte_present(*ptep)) { + pte_clear(mm, addr, ptep); + flush_tlb_pending(); + } - return hugepte_offset(pud, addr); + for (i = 0; i < HUGEPTE_BATCH_SIZE; i++) { + *ptep = __pte(pte_val(pte) & ~_PAGE_HPTEFLAGS); + ptep++; + } } -pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr) +pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, + pte_t *ptep) { - pud_t *pud; + unsigned long old = pte_update(ptep, ~0UL); + int i; - BUG_ON(! in_hugepage_area(mm->context, addr)); + if (old & _PAGE_HASHPTE) + hpte_update(mm, addr, old, 0); - pud = hugepgd_alloc(mm, addr); - if (! pud) - return NULL; + for (i = 1; i < HUGEPTE_BATCH_SIZE; i++) + ptep[i] = __pte(0); - return hugepte_alloc(mm, pud, addr); + return __pte(old); } /* @@ -162,15 +132,17 @@ int is_aligned_hugepage_range(unsigned long addr, unsigned long len) return 0; } -static void flush_segments(void *parm) +static void flush_low_segments(void *parm) { - u16 segs = (unsigned long) parm; + u16 areas = (unsigned long) parm; unsigned long i; asm volatile("isync" : : : "memory"); - for (i = 0; i < 16; i++) { - if (! (segs & (1U << i))) + BUILD_BUG_ON((sizeof(areas)*8) != NUM_LOW_AREAS); + + for (i = 0; i < NUM_LOW_AREAS; i++) { + if (! (areas & (1U << i))) continue; asm volatile("slbie %0" : : "r" (i << SID_SHIFT)); } @@ -178,13 +150,33 @@ static void flush_segments(void *parm) asm volatile("isync" : : : "memory"); } -static int prepare_low_seg_for_htlb(struct mm_struct *mm, unsigned long seg) +static void flush_high_segments(void *parm) { - unsigned long start = seg << SID_SHIFT; - unsigned long end = (seg+1) << SID_SHIFT; + u16 areas = (unsigned long) parm; + unsigned long i, j; + + asm volatile("isync" : : : "memory"); + + BUILD_BUG_ON((sizeof(areas)*8) != NUM_HIGH_AREAS); + + for (i = 0; i < NUM_HIGH_AREAS; i++) { + if (! (areas & (1U << i))) + continue; + for (j = 0; j < (1UL << (HTLB_AREA_SHIFT-SID_SHIFT)); j++) + asm volatile("slbie %0" + :: "r" ((i << HTLB_AREA_SHIFT) + (j << SID_SHIFT))); + } + + asm volatile("isync" : : : "memory"); +} + +static int prepare_low_area_for_htlb(struct mm_struct *mm, unsigned long area) +{ + unsigned long start = area << SID_SHIFT; + unsigned long end = (area+1) << SID_SHIFT; struct vm_area_struct *vma; - BUG_ON(seg >= 16); + BUG_ON(area >= NUM_LOW_AREAS); /* Check no VMAs are in the region */ vma = find_vma(mm, start); @@ -194,20 +186,39 @@ static int prepare_low_seg_for_htlb(struct mm_struct *mm, unsigned long seg) return 0; } -static int open_low_hpage_segs(struct mm_struct *mm, u16 newsegs) +static int prepare_high_area_for_htlb(struct mm_struct *mm, unsigned long area) +{ + unsigned long start = area << HTLB_AREA_SHIFT; + unsigned long end = (area+1) << HTLB_AREA_SHIFT; + struct vm_area_struct *vma; + + BUG_ON(area >= NUM_HIGH_AREAS); + + /* Check no VMAs are in the region */ + vma = find_vma(mm, start); + if (vma && (vma->vm_start < end)) + return -EBUSY; + + return 0; +} + +static int open_low_hpage_areas(struct mm_struct *mm, u16 newareas) { unsigned long i; - newsegs &= ~(mm->context.htlb_segs); - if (! newsegs) + BUILD_BUG_ON((sizeof(newareas)*8) != NUM_LOW_AREAS); + BUILD_BUG_ON((sizeof(mm->context.low_htlb_areas)*8) != NUM_LOW_AREAS); + + newareas &= ~(mm->context.low_htlb_areas); + if (! newareas) return 0; /* The segments we want are already open */ - for (i = 0; i < 16; i++) - if ((1 << i) & newsegs) - if (prepare_low_seg_for_htlb(mm, i) != 0) + for (i = 0; i < NUM_LOW_AREAS; i++) + if ((1 << i) & newareas) + if (prepare_low_area_for_htlb(mm, i) != 0) return -EBUSY; - mm->context.htlb_segs |= newsegs; + mm->context.low_htlb_areas |= newareas; /* update the paca copy of the context struct */ get_paca()->context = mm->context; @@ -215,29 +226,63 @@ static int open_low_hpage_segs(struct mm_struct *mm, u16 newsegs) /* the context change must make it to memory before the flush, * so that further SLB misses do the right thing. */ mb(); - on_each_cpu(flush_segments, (void *)(unsigned long)newsegs, 0, 1); + on_each_cpu(flush_low_segments, (void *)(unsigned long)newareas, 0, 1); + + return 0; +} + +static int open_high_hpage_areas(struct mm_struct *mm, u16 newareas) +{ + unsigned long i; + + BUILD_BUG_ON((sizeof(newareas)*8) != NUM_HIGH_AREAS); + BUILD_BUG_ON((sizeof(mm->context.high_htlb_areas)*8) + != NUM_HIGH_AREAS); + + newareas &= ~(mm->context.high_htlb_areas); + if (! newareas) + return 0; /* The areas we want are already open */ + + for (i = 0; i < NUM_HIGH_AREAS; i++) + if ((1 << i) & newareas) + if (prepare_high_area_for_htlb(mm, i) != 0) + return -EBUSY; + + mm->context.high_htlb_areas |= newareas; + + /* update the paca copy of the context struct */ + get_paca()->context = mm->context; + + /* the context change must make it to memory before the flush, + * so that further SLB misses do the right thing. */ + mb(); + on_each_cpu(flush_high_segments, (void *)(unsigned long)newareas, 0, 1); return 0; } int prepare_hugepage_range(unsigned long addr, unsigned long len) { - if (within_hugepage_high_range(addr, len)) - return 0; - else if ((addr < 0x100000000UL) && ((addr+len) < 0x100000000UL)) { - int err; - /* Yes, we need both tests, in case addr+len overflows - * 64-bit arithmetic */ - err = open_low_hpage_segs(current->mm, + int err; + + if ( (addr+len) < addr ) + return -EINVAL; + + if ((addr + len) < 0x100000000UL) + err = open_low_hpage_areas(current->mm, LOW_ESID_MASK(addr, len)); - if (err) - printk(KERN_DEBUG "prepare_hugepage_range(%lx, %lx)" - " failed (segs: 0x%04hx)\n", addr, len, - LOW_ESID_MASK(addr, len)); + else + err = open_high_hpage_areas(current->mm, + HTLB_AREA_MASK(addr, len)); + if (err) { + printk(KERN_DEBUG "prepare_hugepage_range(%lx, %lx)" + " failed (lowmask: 0x%04hx, highmask: 0x%04hx)\n", + addr, len, + LOW_ESID_MASK(addr, len), HTLB_AREA_MASK(addr, len)); return err; } - return -EINVAL; + return 0; } struct page * @@ -309,8 +354,8 @@ full_search: vma = find_vma(mm, addr); continue; } - if (touches_hugepage_high_range(addr, len)) { - addr = TASK_HPAGE_END; + if (touches_hugepage_high_range(mm, addr, len)) { + addr = ALIGN(addr+1, 1UL<<HTLB_AREA_SHIFT); vma = find_vma(mm, addr); continue; } @@ -389,8 +434,9 @@ hugepage_recheck: if (touches_hugepage_low_range(mm, addr, len)) { addr = (addr & ((~0) << SID_SHIFT)) - len; goto hugepage_recheck; - } else if (touches_hugepage_high_range(addr, len)) { - addr = TASK_HPAGE_BASE - len; + } else if (touches_hugepage_high_range(mm, addr, len)) { + addr = (addr & ((~0UL) << HTLB_AREA_SHIFT)) - len; + goto hugepage_recheck; } /* @@ -481,23 +527,28 @@ static unsigned long htlb_get_low_area(unsigned long len, u16 segmask) return -ENOMEM; } -static unsigned long htlb_get_high_area(unsigned long len) +static unsigned long htlb_get_high_area(unsigned long len, u16 areamask) { - unsigned long addr = TASK_HPAGE_BASE; + unsigned long addr = 0x100000000UL; struct vm_area_struct *vma; vma = find_vma(current->mm, addr); - for (vma = find_vma(current->mm, addr); - addr + len <= TASK_HPAGE_END; - vma = vma->vm_next) { + while (addr + len <= TASK_SIZE_USER64) { BUG_ON(vma && (addr >= vma->vm_end)); /* invariant */ - BUG_ON(! within_hugepage_high_range(addr, len)); + + if (! __within_hugepage_high_range(addr, len, areamask)) { + addr = ALIGN(addr+1, 1UL<<HTLB_AREA_SHIFT); + vma = find_vma(current->mm, addr); + continue; + } if (!vma || (addr + len) <= vma->vm_start) return addr; addr = ALIGN(vma->vm_end, HPAGE_SIZE); - /* Because we're in a hugepage region, this alignment - * should not skip us over any VMAs */ + /* Depending on segmask this might not be a confirmed + * hugepage region, so the ALIGN could have skipped + * some VMAs */ + vma = find_vma(current->mm, addr); } return -ENOMEM; @@ -507,6 +558,9 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) { + int lastshift; + u16 areamask, curareas; + if (len & ~HPAGE_MASK) return -EINVAL; @@ -514,67 +568,49 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, return -EINVAL; if (test_thread_flag(TIF_32BIT)) { - int lastshift = 0; - u16 segmask, cursegs = current->mm->context.htlb_segs; + curareas = current->mm->context.low_htlb_areas; /* First see if we can do the mapping in the existing - * low hpage segments */ - addr = htlb_get_low_area(len, cursegs); + * low areas */ + addr = htlb_get_low_area(len, curareas); if (addr != -ENOMEM) return addr; - for (segmask = LOW_ESID_MASK(0x100000000UL-len, len); - ! lastshift; segmask >>=1) { - if (segmask & 1) + lastshift = 0; + for (areamask = LOW_ESID_MASK(0x100000000UL-len, len); + ! lastshift; areamask >>=1) { + if (areamask & 1) lastshift = 1; - addr = htlb_get_low_area(len, cursegs | segmask); + addr = htlb_get_low_area(len, curareas | areamask); if ((addr != -ENOMEM) - && open_low_hpage_segs(current->mm, segmask) == 0) + && open_low_hpage_areas(current->mm, areamask) == 0) return addr; } - printk(KERN_DEBUG "hugetlb_get_unmapped_area() unable to open" - " enough segments\n"); - return -ENOMEM; } else { - return htlb_get_high_area(len); - } -} - -void hugetlb_mm_free_pgd(struct mm_struct *mm) -{ - int i; - pgd_t *pgdir; - - spin_lock(&mm->page_table_lock); - - pgdir = mm->context.huge_pgdir; - if (! pgdir) - goto out; - - mm->context.huge_pgdir = NULL; + curareas = current->mm->context.high_htlb_areas; - /* cleanup any hugepte pages leftover */ - for (i = 0; i < PTRS_PER_HUGEPGD; i++) { - pud_t *pud = (pud_t *)(pgdir + i); - - if (! pud_none(*pud)) { - pte_t *pte = (pte_t *)pud_page(*pud); - struct page *ptepage = virt_to_page(pte); + /* First see if we can do the mapping in the existing + * high areas */ + addr = htlb_get_high_area(len, curareas); + if (addr != -ENOMEM) + return addr; - ptepage->mapping = NULL; + lastshift = 0; + for (areamask = HTLB_AREA_MASK(TASK_SIZE_USER64-len, len); + ! lastshift; areamask >>=1) { + if (areamask & 1) + lastshift = 1; - BUG_ON(memcmp(pte, empty_zero_page, PAGE_SIZE)); - kmem_cache_free(zero_cache, pte); + addr = htlb_get_high_area(len, curareas | areamask); + if ((addr != -ENOMEM) + && open_high_hpage_areas(current->mm, areamask) == 0) + return addr; } - pud_clear(pud); } - - BUG_ON(memcmp(pgdir, empty_zero_page, PAGE_SIZE)); - kmem_cache_free(zero_cache, pgdir); - - out: - spin_unlock(&mm->page_table_lock); + printk(KERN_DEBUG "hugetlb_get_unmapped_area() unable to open" + " enough areas\n"); + return -ENOMEM; } int hash_huge_page(struct mm_struct *mm, unsigned long access, diff --git a/arch/ppc64/mm/imalloc.c b/arch/ppc64/mm/imalloc.c index b6e75b891ac..c65b87b9275 100644 --- a/arch/ppc64/mm/imalloc.c +++ b/arch/ppc64/mm/imalloc.c @@ -31,7 +31,7 @@ static int get_free_im_addr(unsigned long size, unsigned long *im_addr) break; if ((unsigned long)tmp->addr >= ioremap_bot) addr = tmp->size + (unsigned long) tmp->addr; - if (addr > IMALLOC_END-size) + if (addr >= IMALLOC_END-size) return 1; } *im_addr = addr; diff --git a/arch/ppc64/mm/init.c b/arch/ppc64/mm/init.c index e58a24d4287..c02dc9809ca 100644 --- a/arch/ppc64/mm/init.c +++ b/arch/ppc64/mm/init.c @@ -42,7 +42,6 @@ #include <asm/pgalloc.h> #include <asm/page.h> -#include <asm/abs_addr.h> #include <asm/prom.h> #include <asm/lmb.h> #include <asm/rtas.h> @@ -66,6 +65,14 @@ #include <asm/vdso.h> #include <asm/imalloc.h> +#if PGTABLE_RANGE > USER_VSID_RANGE +#warning Limited user VSID range means pagetable space is wasted +#endif + +#if (TASK_SIZE_USER64 < PGTABLE_RANGE) && (TASK_SIZE_USER64 < USER_VSID_RANGE) +#warning TASK_SIZE is smaller than it needs to be. +#endif + int mem_init_done; unsigned long ioremap_bot = IMALLOC_BASE; static unsigned long phbs_io_bot = PHBS_IO_BASE; @@ -159,7 +166,6 @@ static int map_io_page(unsigned long ea, unsigned long pa, int flags) ptep = pte_alloc_kernel(&init_mm, pmdp, ea); if (!ptep) return -ENOMEM; - pa = abs_to_phys(pa); set_pte_at(&init_mm, ea, ptep, pfn_pte(pa >> PAGE_SHIFT, __pgprot(flags))); spin_unlock(&init_mm.page_table_lock); @@ -226,7 +232,7 @@ void __iomem * __ioremap(unsigned long addr, unsigned long size, * Before that, we map using addresses going * up from ioremap_bot. imalloc will use * the addresses from ioremap_bot through - * IMALLOC_END (0xE000001fffffffff) + * IMALLOC_END * */ pa = addr & PAGE_MASK; @@ -417,12 +423,6 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm) int index; int err; -#ifdef CONFIG_HUGETLB_PAGE - /* We leave htlb_segs as it was, but for a fork, we need to - * clear the huge_pgdir. */ - mm->context.huge_pgdir = NULL; -#endif - again: if (!idr_pre_get(&mmu_context_idr, GFP_KERNEL)) return -ENOMEM; @@ -453,8 +453,6 @@ void destroy_context(struct mm_struct *mm) spin_unlock(&mmu_context_lock); mm->context.id = NO_CONTEXT; - - hugetlb_mm_free_pgd(mm); } /* @@ -484,9 +482,9 @@ void __init mm_init_ppc64(void) for (i = 1; i < lmb.memory.cnt; i++) { unsigned long base, prevbase, prevsize; - prevbase = lmb.memory.region[i-1].physbase; + prevbase = lmb.memory.region[i-1].base; prevsize = lmb.memory.region[i-1].size; - base = lmb.memory.region[i].physbase; + base = lmb.memory.region[i].base; if (base > (prevbase + prevsize)) { io_hole_start = prevbase + prevsize; io_hole_size = base - (prevbase + prevsize); @@ -513,11 +511,8 @@ int page_is_ram(unsigned long pfn) for (i=0; i < lmb.memory.cnt; i++) { unsigned long base; -#ifdef CONFIG_MSCHUNKS - base = lmb.memory.region[i].physbase; -#else base = lmb.memory.region[i].base; -#endif + if ((paddr >= base) && (paddr < (base + lmb.memory.region[i].size))) { return 1; @@ -547,7 +542,7 @@ void __init do_init_bootmem(void) */ bootmap_pages = bootmem_bootmap_pages(total_pages); - start = abs_to_phys(lmb_alloc(bootmap_pages<<PAGE_SHIFT, PAGE_SIZE)); + start = lmb_alloc(bootmap_pages<<PAGE_SHIFT, PAGE_SIZE); BUG_ON(!start); boot_mapsize = init_bootmem(start >> PAGE_SHIFT, total_pages); @@ -558,25 +553,25 @@ void __init do_init_bootmem(void) * present. */ for (i=0; i < lmb.memory.cnt; i++) { - unsigned long physbase, size; + unsigned long base, size; unsigned long start_pfn, end_pfn; - physbase = lmb.memory.region[i].physbase; + base = lmb.memory.region[i].base; size = lmb.memory.region[i].size; - start_pfn = physbase >> PAGE_SHIFT; + start_pfn = base >> PAGE_SHIFT; end_pfn = start_pfn + (size >> PAGE_SHIFT); memory_present(0, start_pfn, end_pfn); - free_bootmem(physbase, size); + free_bootmem(base, size); } /* reserve the sections we're already using */ for (i=0; i < lmb.reserved.cnt; i++) { - unsigned long physbase = lmb.reserved.region[i].physbase; + unsigned long base = lmb.reserved.region[i].base; unsigned long size = lmb.reserved.region[i].size; - reserve_bootmem(physbase, size); + reserve_bootmem(base, size); } } @@ -615,10 +610,10 @@ static int __init setup_kcore(void) int i; for (i=0; i < lmb.memory.cnt; i++) { - unsigned long physbase, size; + unsigned long base, size; struct kcore_list *kcore_mem; - physbase = lmb.memory.region[i].physbase; + base = lmb.memory.region[i].base; size = lmb.memory.region[i].size; /* GFP_ATOMIC to avoid might_sleep warnings during boot */ @@ -626,7 +621,7 @@ static int __init setup_kcore(void) if (!kcore_mem) panic("mem_init: kmalloc failed\n"); - kclist_add(kcore_mem, __va(physbase), size); + kclist_add(kcore_mem, __va(base), size); } kclist_add(&kcore_vmem, (void *)VMALLOC_START, VMALLOC_END-VMALLOC_START); @@ -686,9 +681,6 @@ void __init mem_init(void) mem_init_done = 1; -#ifdef CONFIG_PPC_ISERIES - iommu_vio_init(); -#endif /* Initialize the vDSO */ vdso_init(); } @@ -833,23 +825,43 @@ void __iomem * reserve_phb_iospace(unsigned long size) return virt_addr; } -kmem_cache_t *zero_cache; - -static void zero_ctor(void *pte, kmem_cache_t *cache, unsigned long flags) +static void zero_ctor(void *addr, kmem_cache_t *cache, unsigned long flags) { - memset(pte, 0, PAGE_SIZE); + memset(addr, 0, kmem_cache_size(cache)); } +static const int pgtable_cache_size[2] = { + PTE_TABLE_SIZE, PMD_TABLE_SIZE +}; +static const char *pgtable_cache_name[ARRAY_SIZE(pgtable_cache_size)] = { + "pgd_pte_cache", "pud_pmd_cache", +}; + +kmem_cache_t *pgtable_cache[ARRAY_SIZE(pgtable_cache_size)]; + void pgtable_cache_init(void) { - zero_cache = kmem_cache_create("zero", - PAGE_SIZE, - 0, - SLAB_HWCACHE_ALIGN | SLAB_MUST_HWCACHE_ALIGN, - zero_ctor, - NULL); - if (!zero_cache) - panic("pgtable_cache_init(): could not create zero_cache!\n"); + int i; + + BUILD_BUG_ON(PTE_TABLE_SIZE != pgtable_cache_size[PTE_CACHE_NUM]); + BUILD_BUG_ON(PMD_TABLE_SIZE != pgtable_cache_size[PMD_CACHE_NUM]); + BUILD_BUG_ON(PUD_TABLE_SIZE != pgtable_cache_size[PUD_CACHE_NUM]); + BUILD_BUG_ON(PGD_TABLE_SIZE != pgtable_cache_size[PGD_CACHE_NUM]); + + for (i = 0; i < ARRAY_SIZE(pgtable_cache_size); i++) { + int size = pgtable_cache_size[i]; + const char *name = pgtable_cache_name[i]; + + pgtable_cache[i] = kmem_cache_create(name, + size, size, + SLAB_HWCACHE_ALIGN + | SLAB_MUST_HWCACHE_ALIGN, + zero_ctor, + NULL); + if (! pgtable_cache[i]) + panic("pgtable_cache_init(): could not create %s!\n", + name); + } } pgprot_t phys_mem_access_prot(struct file *file, unsigned long addr, diff --git a/arch/ppc64/mm/numa.c b/arch/ppc64/mm/numa.c index 0b191f2de01..c3116f0d788 100644 --- a/arch/ppc64/mm/numa.c +++ b/arch/ppc64/mm/numa.c @@ -671,7 +671,7 @@ new_range: * Mark reserved regions on this node */ for (i = 0; i < lmb.reserved.cnt; i++) { - unsigned long physbase = lmb.reserved.region[i].physbase; + unsigned long physbase = lmb.reserved.region[i].base; unsigned long size = lmb.reserved.region[i].size; if (pa_to_nid(physbase) != nid && diff --git a/arch/ppc64/mm/slb_low.S b/arch/ppc64/mm/slb_low.S index 8379d678f70..bab255889c5 100644 --- a/arch/ppc64/mm/slb_low.S +++ b/arch/ppc64/mm/slb_low.S @@ -89,28 +89,29 @@ END_FTR_SECTION_IFSET(CPU_FTR_16M_PAGE) b 9f 0: /* user address: proto-VSID = context<<15 | ESID */ - li r11,SLB_VSID_USER - - srdi. r9,r3,13 + srdi. r9,r3,USER_ESID_BITS bne- 8f /* invalid ea bits set */ #ifdef CONFIG_HUGETLB_PAGE BEGIN_FTR_SECTION - /* check against the hugepage ranges */ - cmpldi r3,(TASK_HPAGE_END>>SID_SHIFT) - bge 6f /* >= TASK_HPAGE_END */ - cmpldi r3,(TASK_HPAGE_BASE>>SID_SHIFT) - bge 5f /* TASK_HPAGE_BASE..TASK_HPAGE_END */ + lhz r9,PACAHIGHHTLBAREAS(r13) + srdi r11,r3,(HTLB_AREA_SHIFT-SID_SHIFT) + srd r9,r9,r11 + andi. r9,r9,1 + bne 5f + + li r11,SLB_VSID_USER + cmpldi r3,16 - bge 6f /* 4GB..TASK_HPAGE_BASE */ + bge 6f - lhz r9,PACAHTLBSEGS(r13) + lhz r9,PACALOWHTLBAREAS(r13) srd r9,r9,r3 andi. r9,r9,1 + beq 6f -5: /* this is a hugepage user address */ - li r11,(SLB_VSID_USER|SLB_VSID_L) +5: li r11,SLB_VSID_USER|SLB_VSID_L END_FTR_SECTION_IFSET(CPU_FTR_16M_PAGE) #endif /* CONFIG_HUGETLB_PAGE */ diff --git a/arch/ppc64/mm/tlb.c b/arch/ppc64/mm/tlb.c index 26f0172c452..d8a6593a13f 100644 --- a/arch/ppc64/mm/tlb.c +++ b/arch/ppc64/mm/tlb.c @@ -41,7 +41,58 @@ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); DEFINE_PER_CPU(struct pte_freelist_batch *, pte_freelist_cur); unsigned long pte_freelist_forced_free; -void __pte_free_tlb(struct mmu_gather *tlb, struct page *ptepage) +struct pte_freelist_batch +{ + struct rcu_head rcu; + unsigned int index; + pgtable_free_t tables[0]; +}; + +DEFINE_PER_CPU(struct pte_freelist_batch *, pte_freelist_cur); +unsigned long pte_freelist_forced_free; + +#define PTE_FREELIST_SIZE \ + ((PAGE_SIZE - sizeof(struct pte_freelist_batch)) \ + / sizeof(pgtable_free_t)) + +#ifdef CONFIG_SMP +static void pte_free_smp_sync(void *arg) +{ + /* Do nothing, just ensure we sync with all CPUs */ +} +#endif + +/* This is only called when we are critically out of memory + * (and fail to get a page in pte_free_tlb). + */ +static void pgtable_free_now(pgtable_free_t pgf) +{ + pte_freelist_forced_free++; + + smp_call_function(pte_free_smp_sync, NULL, 0, 1); + + pgtable_free(pgf); +} + +static void pte_free_rcu_callback(struct rcu_head *head) +{ + struct pte_freelist_batch *batch = + container_of(head, struct pte_freelist_batch, rcu); + unsigned int i; + + for (i = 0; i < batch->index; i++) + pgtable_free(batch->tables[i]); + + free_page((unsigned long)batch); +} + +static void pte_free_submit(struct pte_freelist_batch *batch) +{ + INIT_RCU_HEAD(&batch->rcu); + call_rcu(&batch->rcu, pte_free_rcu_callback); +} + +void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf) { /* This is safe as we are holding page_table_lock */ cpumask_t local_cpumask = cpumask_of_cpu(smp_processor_id()); @@ -49,19 +100,19 @@ void __pte_free_tlb(struct mmu_gather *tlb, struct page *ptepage) if (atomic_read(&tlb->mm->mm_users) < 2 || cpus_equal(tlb->mm->cpu_vm_mask, local_cpumask)) { - pte_free(ptepage); + pgtable_free(pgf); return; } if (*batchp == NULL) { *batchp = (struct pte_freelist_batch *)__get_free_page(GFP_ATOMIC); if (*batchp == NULL) { - pte_free_now(ptepage); + pgtable_free_now(pgf); return; } (*batchp)->index = 0; } - (*batchp)->pages[(*batchp)->index++] = ptepage; + (*batchp)->tables[(*batchp)->index++] = pgf; if ((*batchp)->index == PTE_FREELIST_SIZE) { pte_free_submit(*batchp); *batchp = NULL; @@ -132,42 +183,6 @@ void __flush_tlb_pending(struct ppc64_tlb_batch *batch) put_cpu(); } -#ifdef CONFIG_SMP -static void pte_free_smp_sync(void *arg) -{ - /* Do nothing, just ensure we sync with all CPUs */ -} -#endif - -/* This is only called when we are critically out of memory - * (and fail to get a page in pte_free_tlb). - */ -void pte_free_now(struct page *ptepage) -{ - pte_freelist_forced_free++; - - smp_call_function(pte_free_smp_sync, NULL, 0, 1); - - pte_free(ptepage); -} - -static void pte_free_rcu_callback(struct rcu_head *head) -{ - struct pte_freelist_batch *batch = - container_of(head, struct pte_freelist_batch, rcu); - unsigned int i; - - for (i = 0; i < batch->index; i++) - pte_free(batch->pages[i]); - free_page((unsigned long)batch); -} - -void pte_free_submit(struct pte_freelist_batch *batch) -{ - INIT_RCU_HEAD(&batch->rcu); - call_rcu(&batch->rcu, pte_free_rcu_callback); -} - void pte_free_finish(void) { /* This is safe as we are holding page_table_lock */ |