static unsigned long gpage_freearray[MAX_NUMBER_GPAGES];
static unsigned nr_gpages;
-unsigned int hugepte_shift;
-#define PTRS_PER_HUGEPTE (1 << hugepte_shift)
-#define HUGEPTE_TABLE_SIZE (sizeof(pte_t) << hugepte_shift)
+/* Array of valid huge page sizes - non-zero value(hugepte_shift) is
+ * stored for the huge page sizes that are valid.
+ */
+unsigned int mmu_huge_psizes[MMU_PAGE_COUNT] = { }; /* initialize all to 0 */
+
+#define hugepte_shift mmu_huge_psizes
+#define PTRS_PER_HUGEPTE(psize) (1 << hugepte_shift[psize])
+#define HUGEPTE_TABLE_SIZE(psize) (sizeof(pte_t) << hugepte_shift[psize])
+
+#define HUGEPD_SHIFT(psize) (mmu_psize_to_shift(psize) \
+ + hugepte_shift[psize])
+#define HUGEPD_SIZE(psize) (1UL << HUGEPD_SHIFT(psize))
+#define HUGEPD_MASK(psize) (~(HUGEPD_SIZE(psize)-1))
-#define HUGEPD_SHIFT (HPAGE_SHIFT + hugepte_shift)
-#define HUGEPD_SIZE (1UL << HUGEPD_SHIFT)
-#define HUGEPD_MASK (~(HUGEPD_SIZE-1))
+/* Subtract one from array size because we don't need a cache for 4K since
+ * is not a huge page size */
+#define huge_pgtable_cache(psize) (pgtable_cache[HUGEPTE_CACHE_NUM \
+ + psize-1])
+#define HUGEPTE_CACHE_NAME(psize) (huge_pgtable_cache_name[psize])
-#define huge_pgtable_cache (pgtable_cache[HUGEPTE_CACHE_NUM])
+static const char *huge_pgtable_cache_name[MMU_PAGE_COUNT] = {
+ "unused_4K", "hugepte_cache_64K", "unused_64K_AP",
+ "hugepte_cache_1M", "hugepte_cache_16M", "hugepte_cache_16G"
+};
/* Flag to mark huge PD pointers. This means pmd_bad() and pud_bad()
* will choke on pointers to hugepte tables, which is handy for
#define hugepd_none(hpd) ((hpd).pd == 0)
+static inline int shift_to_mmu_psize(unsigned int shift)
+{
+ switch (shift) {
+#ifndef CONFIG_PPC_64K_PAGES
+ case PAGE_SHIFT_64K:
+ return MMU_PAGE_64K;
+#endif
+ case PAGE_SHIFT_16M:
+ return MMU_PAGE_16M;
+ case PAGE_SHIFT_16G:
+ return MMU_PAGE_16G;
+ }
+ return -1;
+}
+
+static inline unsigned int mmu_psize_to_shift(unsigned int mmu_psize)
+{
+ if (mmu_psize_defs[mmu_psize].shift)
+ return mmu_psize_defs[mmu_psize].shift;
+ BUG();
+}
+
static inline pte_t *hugepd_page(hugepd_t hpd)
{
BUG_ON(!(hpd.pd & HUGEPD_OK));
return (pte_t *)(hpd.pd & ~HUGEPD_OK);
}
-static inline pte_t *hugepte_offset(hugepd_t *hpdp, unsigned long addr)
+static inline pte_t *hugepte_offset(hugepd_t *hpdp, unsigned long addr,
+ struct hstate *hstate)
{
- unsigned long idx = ((addr >> HPAGE_SHIFT) & (PTRS_PER_HUGEPTE-1));
+ unsigned int shift = huge_page_shift(hstate);
+ int psize = shift_to_mmu_psize(shift);
+ unsigned long idx = ((addr >> shift) & (PTRS_PER_HUGEPTE(psize)-1));
pte_t *dir = hugepd_page(*hpdp);
return dir + idx;
}
static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp,
- unsigned long address)
+ unsigned long address, unsigned int psize)
{
- pte_t *new = kmem_cache_alloc(huge_pgtable_cache,
+ pte_t *new = kmem_cache_alloc(huge_pgtable_cache(psize),
GFP_KERNEL|__GFP_REPEAT);
if (! new)
spin_lock(&mm->page_table_lock);
if (!hugepd_none(*hpdp))
- kmem_cache_free(huge_pgtable_cache, new);
+ kmem_cache_free(huge_pgtable_cache(psize), new);
else
hpdp->pd = (unsigned long)new | HUGEPD_OK;
spin_unlock(&mm->page_table_lock);
/* Base page size affects how we walk hugetlb page tables */
#ifdef CONFIG_PPC_64K_PAGES
-#define hpmd_offset(pud, addr) pmd_offset(pud, addr)
-#define hpmd_alloc(mm, pud, addr) pmd_alloc(mm, pud, addr)
+#define hpmd_offset(pud, addr, h) pmd_offset(pud, addr)
+#define hpmd_alloc(mm, pud, addr, h) pmd_alloc(mm, pud, addr)
#else
static inline
-pmd_t *hpmd_offset(pud_t *pud, unsigned long addr)
+pmd_t *hpmd_offset(pud_t *pud, unsigned long addr, struct hstate *hstate)
{
- if (HPAGE_SHIFT == PAGE_SHIFT_64K)
+ if (huge_page_shift(hstate) == PAGE_SHIFT_64K)
return pmd_offset(pud, addr);
else
return (pmd_t *) pud;
}
static inline
-pmd_t *hpmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long addr)
+pmd_t *hpmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long addr,
+ struct hstate *hstate)
{
- if (HPAGE_SHIFT == PAGE_SHIFT_64K)
+ if (huge_page_shift(hstate) == PAGE_SHIFT_64K)
return pmd_alloc(mm, pud, addr);
else
return (pmd_t *) pud;
}
/* Moves the gigantic page addresses from the temporary list to the
- * huge_boot_pages list. */
-int alloc_bootmem_huge_page(struct hstate *h)
+ * huge_boot_pages list.
+ */
+int alloc_bootmem_huge_page(struct hstate *hstate)
{
struct huge_bootmem_page *m;
if (nr_gpages == 0)
m = phys_to_virt(gpage_freearray[--nr_gpages]);
gpage_freearray[nr_gpages] = 0;
list_add(&m->list, &huge_boot_pages);
- m->hstate = h;
+ m->hstate = hstate;
return 1;
}
pud_t *pu;
pmd_t *pm;
- BUG_ON(get_slice_psize(mm, addr) != mmu_huge_psize);
+ unsigned int psize;
+ unsigned int shift;
+ unsigned long sz;
+ struct hstate *hstate;
+ psize = get_slice_psize(mm, addr);
+ shift = mmu_psize_to_shift(psize);
+ sz = ((1UL) << shift);
+ hstate = size_to_hstate(sz);
- addr &= HPAGE_MASK;
+ addr &= hstate->mask;
pg = pgd_offset(mm, addr);
if (!pgd_none(*pg)) {
pu = pud_offset(pg, addr);
if (!pud_none(*pu)) {
- pm = hpmd_offset(pu, addr);
+ pm = hpmd_offset(pu, addr, hstate);
if (!pmd_none(*pm))
- return hugepte_offset((hugepd_t *)pm, addr);
+ return hugepte_offset((hugepd_t *)pm, addr,
+ hstate);
}
}
pud_t *pu;
pmd_t *pm;
hugepd_t *hpdp = NULL;
+ struct hstate *hstate;
+ unsigned int psize;
+ hstate = size_to_hstate(sz);
- BUG_ON(get_slice_psize(mm, addr) != mmu_huge_psize);
+ psize = get_slice_psize(mm, addr);
+ BUG_ON(!mmu_huge_psizes[psize]);
- addr &= HPAGE_MASK;
+ addr &= hstate->mask;
pg = pgd_offset(mm, addr);
pu = pud_alloc(mm, pg, addr);
if (pu) {
- pm = hpmd_alloc(mm, pu, addr);
+ pm = hpmd_alloc(mm, pu, addr, hstate);
if (pm)
hpdp = (hugepd_t *)pm;
}
if (! hpdp)
return NULL;
- if (hugepd_none(*hpdp) && __hugepte_alloc(mm, hpdp, addr))
+ if (hugepd_none(*hpdp) && __hugepte_alloc(mm, hpdp, addr, psize))
return NULL;
- return hugepte_offset(hpdp, addr);
+ return hugepte_offset(hpdp, addr, hstate);
}
int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
return 0;
}
-static void free_hugepte_range(struct mmu_gather *tlb, hugepd_t *hpdp)
+static void free_hugepte_range(struct mmu_gather *tlb, hugepd_t *hpdp,
+ unsigned int psize)
{
pte_t *hugepte = hugepd_page(*hpdp);
hpdp->pd = 0;
tlb->need_flush = 1;
- pgtable_free_tlb(tlb, pgtable_free_cache(hugepte, HUGEPTE_CACHE_NUM,
+ pgtable_free_tlb(tlb, pgtable_free_cache(hugepte,
+ HUGEPTE_CACHE_NUM+psize-1,
PGF_CACHENUM_MASK));
}
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)
+ unsigned long floor, unsigned long ceiling,
+ unsigned int psize)
{
pmd_t *pmd;
unsigned long next;
next = pmd_addr_end(addr, end);
if (pmd_none(*pmd))
continue;
- free_hugepte_range(tlb, (hugepd_t *)pmd);
+ free_hugepte_range(tlb, (hugepd_t *)pmd, psize);
} while (pmd++, addr = next, addr != end);
start &= PUD_MASK;
pud_t *pud;
unsigned long next;
unsigned long start;
+ unsigned int shift;
+ unsigned int psize = get_slice_psize(tlb->mm, addr);
+ shift = mmu_psize_to_shift(psize);
start = addr;
pud = pud_offset(pgd, addr);
#ifdef CONFIG_PPC_64K_PAGES
if (pud_none_or_clear_bad(pud))
continue;
- hugetlb_free_pmd_range(tlb, pud, addr, next, floor, ceiling);
+ hugetlb_free_pmd_range(tlb, pud, addr, next, floor, ceiling,
+ psize);
#else
- if (HPAGE_SHIFT == PAGE_SHIFT_64K) {
+ if (shift == PAGE_SHIFT_64K) {
if (pud_none_or_clear_bad(pud))
continue;
- hugetlb_free_pmd_range(tlb, pud, addr, next, floor, ceiling);
+ hugetlb_free_pmd_range(tlb, pud, addr, next, floor,
+ ceiling, psize);
} else {
if (pud_none(*pud))
continue;
- free_hugepte_range(tlb, (hugepd_t *)pud);
+ free_hugepte_range(tlb, (hugepd_t *)pud, psize);
}
#endif
} while (pud++, addr = next, addr != end);
* now has no other vmas using it, so can be freed, we don't
* bother to round floor or end up - the tests don't need that.
*/
+ unsigned int psize = get_slice_psize(tlb->mm, addr);
- addr &= HUGEPD_MASK;
+ addr &= HUGEPD_MASK(psize);
if (addr < floor) {
- addr += HUGEPD_SIZE;
+ addr += HUGEPD_SIZE(psize);
if (!addr)
return;
}
if (ceiling) {
- ceiling &= HUGEPD_MASK;
+ ceiling &= HUGEPD_MASK(psize);
if (!ceiling)
return;
}
if (end - 1 > ceiling - 1)
- end -= HUGEPD_SIZE;
+ end -= HUGEPD_SIZE(psize);
if (addr > end - 1)
return;
start = addr;
pgd = pgd_offset(tlb->mm, addr);
do {
- BUG_ON(get_slice_psize(tlb->mm, addr) != mmu_huge_psize);
+ psize = get_slice_psize(tlb->mm, addr);
+ BUG_ON(!mmu_huge_psizes[psize]);
next = pgd_addr_end(addr, end);
if (pgd_none_or_clear_bad(pgd))
continue;
* necessary anymore if we make hpte_need_flush() get the
* page size from the slices
*/
- pte_update(mm, addr & HPAGE_MASK, ptep, ~0UL, 1);
+ unsigned int psize = get_slice_psize(mm, addr);
+ unsigned int shift = mmu_psize_to_shift(psize);
+ unsigned long sz = ((1UL) << shift);
+ struct hstate *hstate = size_to_hstate(sz);
+ pte_update(mm, addr & hstate->mask, ptep, ~0UL, 1);
}
*ptep = __pte(pte_val(pte) & ~_PAGE_HPTEFLAGS);
}
{
pte_t *ptep;
struct page *page;
+ unsigned int mmu_psize = get_slice_psize(mm, address);
- if (get_slice_psize(mm, address) != mmu_huge_psize)
+ /* Verify it is a huge page else bail. */
+ if (!mmu_huge_psizes[mmu_psize])
return ERR_PTR(-EINVAL);
ptep = huge_pte_offset(mm, address);
page = pte_page(*ptep);
- if (page)
- page += (address % HPAGE_SIZE) / PAGE_SIZE;
+ if (page) {
+ unsigned int shift = mmu_psize_to_shift(mmu_psize);
+ unsigned long sz = ((1UL) << shift);
+ page += (address % sz) / PAGE_SIZE;
+ }
return page;
}
unsigned long len, unsigned long pgoff,
unsigned long flags)
{
- return slice_get_unmapped_area(addr, len, flags,
- mmu_huge_psize, 1, 0);
+ struct hstate *hstate = hstate_file(file);
+ int mmu_psize = shift_to_mmu_psize(huge_page_shift(hstate));
+ return slice_get_unmapped_area(addr, len, flags, mmu_psize, 1, 0);
}
/*
* Called by asm hashtable.S for doing lazy icache flush
*/
static unsigned int hash_huge_page_do_lazy_icache(unsigned long rflags,
- pte_t pte, int trap)
+ pte_t pte, int trap, unsigned long sz)
{
struct page *page;
int i;
/* page is dirty */
if (!test_bit(PG_arch_1, &page->flags) && !PageReserved(page)) {
if (trap == 0x400) {
- for (i = 0; i < (HPAGE_SIZE / PAGE_SIZE); i++)
+ for (i = 0; i < (sz / PAGE_SIZE); i++)
__flush_dcache_icache(page_address(page+i));
set_bit(PG_arch_1, &page->flags);
} else {
{
pte_t *ptep;
unsigned long old_pte, new_pte;
- unsigned long va, rflags, pa;
+ unsigned long va, rflags, pa, sz;
long slot;
int err = 1;
int ssize = user_segment_size(ea);
+ unsigned int mmu_psize;
+ int shift;
+ mmu_psize = get_slice_psize(mm, ea);
+ if (!mmu_huge_psizes[mmu_psize])
+ goto out;
ptep = huge_pte_offset(mm, ea);
/* Search the Linux page table for a match with va */
rflags = 0x2 | (!(new_pte & _PAGE_RW));
/* _PAGE_EXEC -> HW_NO_EXEC since it's inverted */
rflags |= ((new_pte & _PAGE_EXEC) ? 0 : HPTE_R_N);
+ shift = mmu_psize_to_shift(mmu_psize);
+ sz = ((1UL) << shift);
if (!cpu_has_feature(CPU_FTR_COHERENT_ICACHE))
/* No CPU has hugepages but lacks no execute, so we
* don't need to worry about that case */
rflags = hash_huge_page_do_lazy_icache(rflags, __pte(old_pte),
- trap);
+ trap, sz);
/* Check if pte already has an hpte (case 2) */
if (unlikely(old_pte & _PAGE_HASHPTE)) {
/* There MIGHT be an HPTE for this pte */
unsigned long hash, slot;
- hash = hpt_hash(va, HPAGE_SHIFT, ssize);
+ hash = hpt_hash(va, shift, ssize);
if (old_pte & _PAGE_F_SECOND)
hash = ~hash;
slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
slot += (old_pte & _PAGE_F_GIX) >> 12;
- if (ppc_md.hpte_updatepp(slot, rflags, va, mmu_huge_psize,
+ if (ppc_md.hpte_updatepp(slot, rflags, va, mmu_psize,
ssize, local) == -1)
old_pte &= ~_PAGE_HPTEFLAGS;
}
if (likely(!(old_pte & _PAGE_HASHPTE))) {
- unsigned long hash = hpt_hash(va, HPAGE_SHIFT, ssize);
+ unsigned long hash = hpt_hash(va, shift, ssize);
unsigned long hpte_group;
pa = pte_pfn(__pte(old_pte)) << PAGE_SHIFT;
/* Insert into the hash table, primary slot */
slot = ppc_md.hpte_insert(hpte_group, va, pa, rflags, 0,
- mmu_huge_psize, ssize);
+ mmu_psize, ssize);
/* Primary is full, try the secondary */
if (unlikely(slot == -1)) {
HPTES_PER_GROUP) & ~0x7UL;
slot = ppc_md.hpte_insert(hpte_group, va, pa, rflags,
HPTE_V_SECONDARY,
- mmu_huge_psize, ssize);
+ mmu_psize, ssize);
if (slot == -1) {
if (mftb() & 0x1)
hpte_group = ((hash & htab_hash_mask) *
(mmu_psize_defs[psize].shift > MIN_HUGEPTE_SHIFT ||
mmu_psize_defs[psize].shift == PAGE_SHIFT_64K ||
mmu_psize_defs[psize].shift == PAGE_SHIFT_16G)) {
- /* Return if huge page size is the same as the
- * base page size. */
- if (mmu_psize_defs[psize].shift == PAGE_SHIFT)
+ /* Return if huge page size has already been setup or is the
+ * same as the base page size. */
+ if (mmu_huge_psizes[psize] ||
+ mmu_psize_defs[psize].shift == PAGE_SHIFT)
return;
+ hugetlb_add_hstate(mmu_psize_defs[psize].shift - PAGE_SHIFT);
- HPAGE_SHIFT = mmu_psize_defs[psize].shift;
- mmu_huge_psize = psize;
-
- switch (HPAGE_SHIFT) {
+ switch (mmu_psize_defs[psize].shift) {
case PAGE_SHIFT_64K:
/* We only allow 64k hpages with 4k base page,
* which was checked above, and always put them
* at the PMD */
- hugepte_shift = PMD_SHIFT;
+ hugepte_shift[psize] = PMD_SHIFT;
break;
case PAGE_SHIFT_16M:
/* 16M pages can be at two different levels
* of pagestables based on base page size */
if (PAGE_SHIFT == PAGE_SHIFT_64K)
- hugepte_shift = PMD_SHIFT;
+ hugepte_shift[psize] = PMD_SHIFT;
else /* 4k base page */
- hugepte_shift = PUD_SHIFT;
+ hugepte_shift[psize] = PUD_SHIFT;
break;
case PAGE_SHIFT_16G:
/* 16G pages are always at PGD level */
- hugepte_shift = PGDIR_SHIFT;
+ hugepte_shift[psize] = PGDIR_SHIFT;
break;
}
- hugepte_shift -= HPAGE_SHIFT;
+ hugepte_shift[psize] -= mmu_psize_defs[psize].shift;
} else
- HPAGE_SHIFT = 0;
+ hugepte_shift[psize] = 0;
}
static int __init hugepage_setup_sz(char *str)
{
unsigned long long size;
- int mmu_psize = -1;
+ int mmu_psize;
int shift;
size = memparse(str, &str);
shift = __ffs(size);
- switch (shift) {
-#ifndef CONFIG_PPC_64K_PAGES
- case PAGE_SHIFT_64K:
- mmu_psize = MMU_PAGE_64K;
- break;
-#endif
- case PAGE_SHIFT_16M:
- mmu_psize = MMU_PAGE_16M;
- break;
- case PAGE_SHIFT_16G:
- mmu_psize = MMU_PAGE_16G;
- break;
- }
-
- if (mmu_psize >= 0 && mmu_psize_defs[mmu_psize].shift) {
+ mmu_psize = shift_to_mmu_psize(shift);
+ if (mmu_psize >= 0 && mmu_psize_defs[mmu_psize].shift)
set_huge_psize(mmu_psize);
- hugetlb_add_hstate(shift - PAGE_SHIFT);
- }
else
printk(KERN_WARNING "Invalid huge page size specified(%llu)\n", size);
static int __init hugetlbpage_init(void)
{
+ unsigned int psize;
+
if (!cpu_has_feature(CPU_FTR_16M_PAGE))
return -ENODEV;
-
- huge_pgtable_cache = kmem_cache_create("hugepte_cache",
- HUGEPTE_TABLE_SIZE,
- HUGEPTE_TABLE_SIZE,
- 0,
- zero_ctor);
- if (! huge_pgtable_cache)
- panic("hugetlbpage_init(): could not create hugepte cache\n");
+ /* Add supported huge page sizes. Need to change HUGE_MAX_HSTATE
+ * and adjust PTE_NONCACHE_NUM if the number of supported huge page
+ * sizes changes.
+ */
+ set_huge_psize(MMU_PAGE_16M);
+ set_huge_psize(MMU_PAGE_64K);
+ set_huge_psize(MMU_PAGE_16G);
+
+ for (psize = 0; psize < MMU_PAGE_COUNT; ++psize) {
+ if (mmu_huge_psizes[psize]) {
+ huge_pgtable_cache(psize) = kmem_cache_create(
+ HUGEPTE_CACHE_NAME(psize),
+ HUGEPTE_TABLE_SIZE(psize),
+ HUGEPTE_TABLE_SIZE(psize),
+ 0,
+ zero_ctor);
+ if (!huge_pgtable_cache(psize))
+ panic("hugetlbpage_init(): could not create %s"\
+ "\n", HUGEPTE_CACHE_NAME(psize));
+ }
+ }
return 0;
}
projects / linux-2.6 / commitdiff