We move large part of fsl related code to hugetlbpage-book3e.c.
Only code movement. This also avoid #ifdef in the code.
Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com>
---
arch/powerpc/include/asm/hugetlb.h | 1 +
arch/powerpc/mm/hugetlbpage-book3e.c | 293 +++++++++++++++++++++++++
arch/powerpc/mm/hugetlbpage-hash64.c | 121 +++++++++++
arch/powerpc/mm/hugetlbpage.c | 401 +----------------------------------
4 files changed, 416 insertions(+), 400 deletions(-)
diff --git a/arch/powerpc/include/asm/hugetlb.h
b/arch/powerpc/include/asm/hugetlb.h
index 7eac89b9f02e..0525f1c29afb 100644
--- a/arch/powerpc/include/asm/hugetlb.h
+++ b/arch/powerpc/include/asm/hugetlb.h
@@ -47,6 +47,7 @@ static inline unsigned int hugepd_shift(hugepd_t hpd)
#endif /* CONFIG_PPC_BOOK3S_64 */
+#define hugepd_none(hpd) ((hpd).pd == 0)
static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
unsigned pdshift)
diff --git a/arch/powerpc/mm/hugetlbpage-book3e.c
b/arch/powerpc/mm/hugetlbpage-book3e.c
index ba47aaf33a4b..e6339ac45f0f 100644
--- a/arch/powerpc/mm/hugetlbpage-book3e.c
+++ b/arch/powerpc/mm/hugetlbpage-book3e.c
@@ -7,6 +7,39 @@
*/
#include <linux/mm.h>
#include <linux/hugetlb.h>
+#include <linux/bootmem.h>
+#include <linux/moduleparam.h>
+#include <linux/memblock.h>
+#include <asm/tlb.h>
+#include <asm/setup.h>
+
+/*
+ * Tracks gpages after the device tree is scanned and before the
+ * huge_boot_pages list is ready. On non-Freescale implementations, this is
+ * just used to track 16G pages and so is a single array. FSL-based
+ * implementations may have more than one gpage size, so we need multiple
+ * arrays
+ */
+#ifdef CONFIG_PPC_FSL_BOOK3E
+#define MAX_NUMBER_GPAGES 128
+struct psize_gpages {
+ u64 gpage_list[MAX_NUMBER_GPAGES];
+ unsigned int nr_gpages;
+};
+static struct psize_gpages gpage_freearray[MMU_PAGE_COUNT];
+#endif
+
+/*
+ * These macros define how to determine which level of the page table holds
+ * the hpdp.
+ */
+#ifdef CONFIG_PPC_FSL_BOOK3E
+#define HUGEPD_PGD_SHIFT PGDIR_SHIFT
+#define HUGEPD_PUD_SHIFT PUD_SHIFT
+#else
+#define HUGEPD_PGD_SHIFT PUD_SHIFT
+#define HUGEPD_PUD_SHIFT PMD_SHIFT
+#endif
#ifdef CONFIG_PPC_FSL_BOOK3E
#ifdef CONFIG_PPC64
@@ -151,3 +184,263 @@ void flush_hugetlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
__flush_tlb_page(vma->vm_mm, vmaddr, tsize, 0);
}
+
+static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp,
+ unsigned long address, unsigned pdshift, unsigned
pshift)
+{
+ struct kmem_cache *cachep;
+ pte_t *new;
+
+ int i;
+ int num_hugepd = 1 << (pshift - pdshift);
+ cachep = hugepte_cache;
+
+ new = kmem_cache_zalloc(cachep, GFP_KERNEL|__GFP_REPEAT);
+
+ BUG_ON(pshift > HUGEPD_SHIFT_MASK);
+ BUG_ON((unsigned long)new & HUGEPD_SHIFT_MASK);
+
+ if (! new)
+ return -ENOMEM;
+
+ spin_lock(&mm->page_table_lock);
+ /*
+ * We have multiple higher-level entries that point to the same
+ * actual pte location. Fill in each as we go and backtrack on error.
+ * We need all of these so the DTLB pgtable walk code can find the
+ * right higher-level entry without knowing if it's a hugepage or not.
+ */
+ for (i = 0; i < num_hugepd; i++, hpdp++) {
+ if (unlikely(!hugepd_none(*hpdp)))
+ break;
+ else
+ /* We use the old format for PPC_FSL_BOOK3E */
+ hpdp->pd = ((unsigned long)new & ~PD_HUGE) | pshift;
+ }
+ /* If we bailed from the for loop early, an error occurred, clean up */
+ if (i < num_hugepd) {
+ for (i = i - 1 ; i >= 0; i--, hpdp--)
+ hpdp->pd = 0;
+ kmem_cache_free(cachep, new);
+ }
+ spin_unlock(&mm->page_table_lock);
+ return 0;
+}
+
+pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long
sz)
+{
+ pgd_t *pg;
+ pud_t *pu;
+ pmd_t *pm;
+ hugepd_t *hpdp = NULL;
+ unsigned pshift = __ffs(sz);
+ unsigned pdshift = PGDIR_SHIFT;
+
+ addr &= ~(sz-1);
+
+ pg = pgd_offset(mm, addr);
+
+ if (pshift >= HUGEPD_PGD_SHIFT) {
+ hpdp = (hugepd_t *)pg;
+ } else {
+ pdshift = PUD_SHIFT;
+ pu = pud_alloc(mm, pg, addr);
+ if (pshift >= HUGEPD_PUD_SHIFT) {
+ hpdp = (hugepd_t *)pu;
+ } else {
+ pdshift = PMD_SHIFT;
+ pm = pmd_alloc(mm, pu, addr);
+ hpdp = (hugepd_t *)pm;
+ }
+ }
+
+ if (!hpdp)
+ return NULL;
+
+ BUG_ON(!hugepd_none(*hpdp) && !hugepd_ok(*hpdp));
+
+ if (hugepd_none(*hpdp) && __hugepte_alloc(mm, hpdp, addr, pdshift,
pshift))
+ return NULL;
+
+ return hugepte_offset(*hpdp, addr, pdshift);
+}
+
+#ifdef CONFIG_PPC_FSL_BOOK3E
+/* Build list of addresses of gigantic pages. This function is used in early
+ * boot before the buddy allocator is setup.
+ */
+void add_gpage(u64 addr, u64 page_size, unsigned long number_of_pages)
+{
+ unsigned int idx = shift_to_mmu_psize(__ffs(page_size));
+ int i;
+
+ if (addr == 0)
+ return;
+
+ gpage_freearray[idx].nr_gpages = number_of_pages;
+
+ for (i = 0; i < number_of_pages; i++) {
+ gpage_freearray[idx].gpage_list[i] = addr;
+ addr += page_size;
+ }
+}
+
+/*
+ * Moves the gigantic page addresses from the temporary list to the
+ * huge_boot_pages list.
+ */
+int alloc_bootmem_huge_page(struct hstate *hstate)
+{
+ struct huge_bootmem_page *m;
+ int idx = shift_to_mmu_psize(huge_page_shift(hstate));
+ int nr_gpages = gpage_freearray[idx].nr_gpages;
+
+ if (nr_gpages == 0)
+ return 0;
+
+#ifdef CONFIG_HIGHMEM
+ /*
+ * If gpages can be in highmem we can't use the trick of storing the
+ * data structure in the page; allocate space for this
+ */
+ m = memblock_virt_alloc(sizeof(struct huge_bootmem_page), 0);
+ m->phys = gpage_freearray[idx].gpage_list[--nr_gpages];
+#else
+ m = phys_to_virt(gpage_freearray[idx].gpage_list[--nr_gpages]);
+#endif
+
+ list_add(&m->list, &huge_boot_pages);
+ gpage_freearray[idx].nr_gpages = nr_gpages;
+ gpage_freearray[idx].gpage_list[nr_gpages] = 0;
+ m->hstate = hstate;
+
+ return 1;
+}
+/*
+ * Scan the command line hugepagesz= options for gigantic pages; store those in
+ * a list that we use to allocate the memory once all options are parsed.
+ */
+
+unsigned long gpage_npages[MMU_PAGE_COUNT];
+
+static int __init do_gpage_early_setup(char *param, char *val,
+ const char *unused, void *arg)
+{
+ static phys_addr_t size;
+ unsigned long npages;
+
+ /*
+ * The hugepagesz and hugepages cmdline options are interleaved. We
+ * use the size variable to keep track of whether or not this was done
+ * properly and skip over instances where it is incorrect. Other
+ * command-line parsing code will issue warnings, so we don't need to.
+ *
+ */
+ if ((strcmp(param, "default_hugepagesz") == 0) ||
+ (strcmp(param, "hugepagesz") == 0)) {
+ size = memparse(val, NULL);
+ } else if (strcmp(param, "hugepages") == 0) {
+ if (size != 0) {
+ if (sscanf(val, "%lu", &npages) <= 0)
+ npages = 0;
+ if (npages > MAX_NUMBER_GPAGES) {
+ pr_warn("MMU: %lu pages requested for page "
+ "size %llu KB, limiting to "
+ __stringify(MAX_NUMBER_GPAGES) "\n",
+ npages, size / 1024);
+ npages = MAX_NUMBER_GPAGES;
+ }
+ gpage_npages[shift_to_mmu_psize(__ffs(size))] = npages;
+ size = 0;
+ }
+ }
+ return 0;
+}
+
+
+/*
+ * This function allocates physical space for pages that are larger than the
+ * buddy allocator can handle. We want to allocate these in highmem because
+ * the amount of lowmem is limited. This means that this function MUST be
+ * called before lowmem_end_addr is set up in MMU_init() in order for the lmb
+ * allocate to grab highmem.
+ */
+void __init reserve_hugetlb_gpages(void)
+{
+ static __initdata char cmdline[COMMAND_LINE_SIZE];
+ phys_addr_t size, base;
+ int i;
+
+ strlcpy(cmdline, boot_command_line, COMMAND_LINE_SIZE);
+ parse_args("hugetlb gpages", cmdline, NULL, 0, 0, 0,
+ NULL, &do_gpage_early_setup);
+
+ /*
+ * Walk gpage list in reverse, allocating larger page sizes first.
+ * Skip over unsupported sizes, or sizes that have 0 gpages allocated.
+ * When we reach the point in the list where pages are no longer
+ * considered gpages, we're done.
+ */
+ for (i = MMU_PAGE_COUNT-1; i >= 0; i--) {
+ if (mmu_psize_defs[i].shift == 0 || gpage_npages[i] == 0)
+ continue;
+ else if (mmu_psize_to_shift(i) < (MAX_ORDER + PAGE_SHIFT))
+ break;
+
+ size = (phys_addr_t)(1ULL << mmu_psize_to_shift(i));
+ base = memblock_alloc_base(size * gpage_npages[i], size,
+ MEMBLOCK_ALLOC_ANYWHERE);
+ add_gpage(base, size, gpage_npages[i]);
+ }
+}
+
+#define HUGEPD_FREELIST_SIZE \
+ ((PAGE_SIZE - sizeof(struct hugepd_freelist)) / sizeof(pte_t))
+
+struct hugepd_freelist {
+ struct rcu_head rcu;
+ unsigned int index;
+ void *ptes[0];
+};
+
+static DEFINE_PER_CPU(struct hugepd_freelist *, hugepd_freelist_cur);
+
+static void hugepd_free_rcu_callback(struct rcu_head *head)
+{
+ struct hugepd_freelist *batch =
+ container_of(head, struct hugepd_freelist, rcu);
+ unsigned int i;
+
+ for (i = 0; i < batch->index; i++)
+ kmem_cache_free(hugepte_cache, batch->ptes[i]);
+
+ free_page((unsigned long)batch);
+}
+
+void hugepd_free(struct mmu_gather *tlb, void *hugepte)
+{
+ struct hugepd_freelist **batchp;
+
+ batchp = this_cpu_ptr(&hugepd_freelist_cur);
+
+ if (atomic_read(&tlb->mm->mm_users) < 2 ||
+ cpumask_equal(mm_cpumask(tlb->mm),
+ cpumask_of(smp_processor_id()))) {
+ kmem_cache_free(hugepte_cache, hugepte);
+ put_cpu_var(hugepd_freelist_cur);
+ return;
+ }
+
+ if (*batchp == NULL) {
+ *batchp = (struct hugepd_freelist *)__get_free_page(GFP_ATOMIC);
+ (*batchp)->index = 0;
+ }
+
+ (*batchp)->ptes[(*batchp)->index++] = hugepte;
+ if ((*batchp)->index == HUGEPD_FREELIST_SIZE) {
+ call_rcu_sched(&(*batchp)->rcu, hugepd_free_rcu_callback);
+ *batchp = NULL;
+ }
+ put_cpu_var(hugepd_freelist_cur);
+}
+#endif
diff --git a/arch/powerpc/mm/hugetlbpage-hash64.c
b/arch/powerpc/mm/hugetlbpage-hash64.c
index 9c224b012d62..9e457c83626b 100644
--- a/arch/powerpc/mm/hugetlbpage-hash64.c
+++ b/arch/powerpc/mm/hugetlbpage-hash64.c
@@ -14,6 +14,17 @@
#include <asm/cacheflush.h>
#include <asm/machdep.h>
+/*
+ * Tracks gpages after the device tree is scanned and before the
+ * huge_boot_pages list is ready. On non-Freescale implementations, this is
+ * just used to track 16G pages and so is a single array. FSL-based
+ * implementations may have more than one gpage size, so we need multiple
+ * arrays
+ */
+#define MAX_NUMBER_GPAGES 1024
+static u64 gpage_freearray[MAX_NUMBER_GPAGES];
+static unsigned nr_gpages;
+
extern long hpte_insert_repeating(unsigned long hash, unsigned long vpn,
unsigned long pa, unsigned long rlags,
unsigned long vflags, int psize, int ssize);
@@ -132,3 +143,113 @@ int hugepd_ok(hugepd_t hpd)
return 0;
}
#endif
+
+static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp,
+ unsigned long address, unsigned pdshift, unsigned
pshift)
+{
+ struct kmem_cache *cachep;
+ pte_t *new;
+
+ cachep = PGT_CACHE(pdshift - pshift);
+
+ new = kmem_cache_zalloc(cachep, GFP_KERNEL|__GFP_REPEAT);
+
+ BUG_ON(pshift > HUGEPD_SHIFT_MASK);
+ BUG_ON((unsigned long)new & HUGEPD_SHIFT_MASK);
+
+ if (! new)
+ return -ENOMEM;
+
+ spin_lock(&mm->page_table_lock);
+ if (!hugepd_none(*hpdp))
+ kmem_cache_free(cachep, new);
+ else {
+ hpdp->pd = (unsigned long)new |
+ (shift_to_mmu_psize(pshift) << 2);
+ }
+ spin_unlock(&mm->page_table_lock);
+ return 0;
+}
+
+/*
+ * At this point we do the placement change only for BOOK3S 64. This would
+ * possibly work on other subarchs.
+ */
+pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long
sz)
+{
+ pgd_t *pg;
+ pud_t *pu;
+ pmd_t *pm;
+ hugepd_t *hpdp = NULL;
+ unsigned pshift = __ffs(sz);
+ unsigned pdshift = PGDIR_SHIFT;
+
+ addr &= ~(sz-1);
+ pg = pgd_offset(mm, addr);
+
+ if (pshift == PGDIR_SHIFT)
+ /* 16GB huge page */
+ return (pte_t *) pg;
+ else if (pshift > PUD_SHIFT)
+ /*
+ * We need to use hugepd table
+ */
+ hpdp = (hugepd_t *)pg;
+ else {
+ pdshift = PUD_SHIFT;
+ pu = pud_alloc(mm, pg, addr);
+ if (pshift == PUD_SHIFT)
+ return (pte_t *)pu;
+ else if (pshift > PMD_SHIFT)
+ hpdp = (hugepd_t *)pu;
+ else {
+ pdshift = PMD_SHIFT;
+ pm = pmd_alloc(mm, pu, addr);
+ if (pshift == PMD_SHIFT)
+ /* 16MB hugepage */
+ return (pte_t *)pm;
+ else
+ hpdp = (hugepd_t *)pm;
+ }
+ }
+ if (!hpdp)
+ return NULL;
+
+ BUG_ON(!hugepd_none(*hpdp) && !hugepd_ok(*hpdp));
+
+ if (hugepd_none(*hpdp) && __hugepte_alloc(mm, hpdp, addr, pdshift,
pshift))
+ return NULL;
+
+ return hugepte_offset(*hpdp, addr, pdshift);
+}
+
+
+/* Build list of addresses of gigantic pages. This function is used in early
+ * boot before the buddy allocator is setup.
+ */
+void add_gpage(u64 addr, u64 page_size, unsigned long number_of_pages)
+{
+ if (!addr)
+ return;
+ while (number_of_pages > 0) {
+ gpage_freearray[nr_gpages] = addr;
+ nr_gpages++;
+ number_of_pages--;
+ addr += page_size;
+ }
+}
+
+/* Moves the gigantic page addresses from the temporary list to the
+ * huge_boot_pages list.
+ */
+int alloc_bootmem_huge_page(struct hstate *hstate)
+{
+ struct huge_bootmem_page *m;
+ if (nr_gpages == 0)
+ return 0;
+ m = phys_to_virt(gpage_freearray[--nr_gpages]);
+ gpage_freearray[nr_gpages] = 0;
+ list_add(&m->list, &huge_boot_pages);
+ m->hstate = hstate;
+ return 1;
+}
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index 744e24bcb85c..c94502899e94 100644
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c
@@ -31,413 +31,14 @@
unsigned int HPAGE_SHIFT;
-/*
- * Tracks gpages after the device tree is scanned and before the
- * huge_boot_pages list is ready. On non-Freescale implementations, this is
- * just used to track 16G pages and so is a single array. FSL-based
- * implementations may have more than one gpage size, so we need multiple
- * arrays
- */
-#ifdef CONFIG_PPC_FSL_BOOK3E
-#define MAX_NUMBER_GPAGES 128
-struct psize_gpages {
- u64 gpage_list[MAX_NUMBER_GPAGES];
- unsigned int nr_gpages;
-};
-static struct psize_gpages gpage_freearray[MMU_PAGE_COUNT];
-#else
-#define MAX_NUMBER_GPAGES 1024
-static u64 gpage_freearray[MAX_NUMBER_GPAGES];
-static unsigned nr_gpages;
-#endif
-
-#define hugepd_none(hpd) ((hpd).pd == 0)
-
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
{
/* Only called for hugetlbfs pages, hence can ignore THP */
return __find_linux_pte_or_hugepte(mm->pgd, addr, NULL, NULL);
}
-static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp,
- unsigned long address, unsigned pdshift, unsigned
pshift)
-{
- struct kmem_cache *cachep;
- pte_t *new;
-
-#ifdef CONFIG_PPC_FSL_BOOK3E
- int i;
- int num_hugepd = 1 << (pshift - pdshift);
- cachep = hugepte_cache;
-#else
- cachep = PGT_CACHE(pdshift - pshift);
-#endif
-
- new = kmem_cache_zalloc(cachep, GFP_KERNEL|__GFP_REPEAT);
-
- BUG_ON(pshift > HUGEPD_SHIFT_MASK);
- BUG_ON((unsigned long)new & HUGEPD_SHIFT_MASK);
-
- if (! new)
- return -ENOMEM;
-
- spin_lock(&mm->page_table_lock);
-#ifdef CONFIG_PPC_FSL_BOOK3E
- /*
- * We have multiple higher-level entries that point to the same
- * actual pte location. Fill in each as we go and backtrack on error.
- * We need all of these so the DTLB pgtable walk code can find the
- * right higher-level entry without knowing if it's a hugepage or not.
- */
- for (i = 0; i < num_hugepd; i++, hpdp++) {
- if (unlikely(!hugepd_none(*hpdp)))
- break;
- else
- /* We use the old format for PPC_FSL_BOOK3E */
- hpdp->pd = ((unsigned long)new & ~PD_HUGE) | pshift;
- }
- /* If we bailed from the for loop early, an error occurred, clean up */
- if (i < num_hugepd) {
- for (i = i - 1 ; i >= 0; i--, hpdp--)
- hpdp->pd = 0;
- kmem_cache_free(cachep, new);
- }
-#else
- if (!hugepd_none(*hpdp))
- kmem_cache_free(cachep, new);
- else {
-#ifdef CONFIG_PPC_BOOK3S_64
- hpdp->pd = (unsigned long)new |
- (shift_to_mmu_psize(pshift) << 2);
-#else
- hpdp->pd = ((unsigned long)new & ~PD_HUGE) | pshift;
-#endif
- }
-#endif
- spin_unlock(&mm->page_table_lock);
- return 0;
-}
-
-/*
- * These macros define how to determine which level of the page table holds
- * the hpdp.
- */
-#ifdef CONFIG_PPC_FSL_BOOK3E
-#define HUGEPD_PGD_SHIFT PGDIR_SHIFT
-#define HUGEPD_PUD_SHIFT PUD_SHIFT
-#else
-#define HUGEPD_PGD_SHIFT PUD_SHIFT
-#define HUGEPD_PUD_SHIFT PMD_SHIFT
-#endif
-
-#ifdef CONFIG_PPC_BOOK3S_64
-/*
- * At this point we do the placement change only for BOOK3S 64. This would
- * possibly work on other subarchs.
- */
-pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long
sz)
-{
- pgd_t *pg;
- pud_t *pu;
- pmd_t *pm;
- hugepd_t *hpdp = NULL;
- unsigned pshift = __ffs(sz);
- unsigned pdshift = PGDIR_SHIFT;
-
- addr &= ~(sz-1);
- pg = pgd_offset(mm, addr);
-
- if (pshift == PGDIR_SHIFT)
- /* 16GB huge page */
- return (pte_t *) pg;
- else if (pshift > PUD_SHIFT)
- /*
- * We need to use hugepd table
- */
- hpdp = (hugepd_t *)pg;
- else {
- pdshift = PUD_SHIFT;
- pu = pud_alloc(mm, pg, addr);
- if (pshift == PUD_SHIFT)
- return (pte_t *)pu;
- else if (pshift > PMD_SHIFT)
- hpdp = (hugepd_t *)pu;
- else {
- pdshift = PMD_SHIFT;
- pm = pmd_alloc(mm, pu, addr);
- if (pshift == PMD_SHIFT)
- /* 16MB hugepage */
- return (pte_t *)pm;
- else
- hpdp = (hugepd_t *)pm;
- }
- }
- if (!hpdp)
- return NULL;
-
- BUG_ON(!hugepd_none(*hpdp) && !hugepd_ok(*hpdp));
-
- if (hugepd_none(*hpdp) && __hugepte_alloc(mm, hpdp, addr, pdshift,
pshift))
- return NULL;
-
- return hugepte_offset(*hpdp, addr, pdshift);
-}
-
-#else
-
-pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long
sz)
-{
- pgd_t *pg;
- pud_t *pu;
- pmd_t *pm;
- hugepd_t *hpdp = NULL;
- unsigned pshift = __ffs(sz);
- unsigned pdshift = PGDIR_SHIFT;
-
- addr &= ~(sz-1);
-
- pg = pgd_offset(mm, addr);
-
- if (pshift >= HUGEPD_PGD_SHIFT) {
- hpdp = (hugepd_t *)pg;
- } else {
- pdshift = PUD_SHIFT;
- pu = pud_alloc(mm, pg, addr);
- if (pshift >= HUGEPD_PUD_SHIFT) {
- hpdp = (hugepd_t *)pu;
- } else {
- pdshift = PMD_SHIFT;
- pm = pmd_alloc(mm, pu, addr);
- hpdp = (hugepd_t *)pm;
- }
- }
-
- if (!hpdp)
- return NULL;
-
- BUG_ON(!hugepd_none(*hpdp) && !hugepd_ok(*hpdp));
-
- if (hugepd_none(*hpdp) && __hugepte_alloc(mm, hpdp, addr, pdshift,
pshift))
- return NULL;
-
- return hugepte_offset(*hpdp, addr, pdshift);
-}
-#endif
-
-#ifdef CONFIG_PPC_FSL_BOOK3E
-/* Build list of addresses of gigantic pages. This function is used in early
- * boot before the buddy allocator is setup.
- */
-void add_gpage(u64 addr, u64 page_size, unsigned long number_of_pages)
-{
- unsigned int idx = shift_to_mmu_psize(__ffs(page_size));
- int i;
-
- if (addr == 0)
- return;
-
- gpage_freearray[idx].nr_gpages = number_of_pages;
-
- for (i = 0; i < number_of_pages; i++) {
- gpage_freearray[idx].gpage_list[i] = addr;
- addr += page_size;
- }
-}
-
-/*
- * Moves the gigantic page addresses from the temporary list to the
- * huge_boot_pages list.
- */
-int alloc_bootmem_huge_page(struct hstate *hstate)
-{
- struct huge_bootmem_page *m;
- int idx = shift_to_mmu_psize(huge_page_shift(hstate));
- int nr_gpages = gpage_freearray[idx].nr_gpages;
-
- if (nr_gpages == 0)
- return 0;
-
-#ifdef CONFIG_HIGHMEM
- /*
- * If gpages can be in highmem we can't use the trick of storing the
- * data structure in the page; allocate space for this
- */
- m = memblock_virt_alloc(sizeof(struct huge_bootmem_page), 0);
- m->phys = gpage_freearray[idx].gpage_list[--nr_gpages];
-#else
- m = phys_to_virt(gpage_freearray[idx].gpage_list[--nr_gpages]);
-#endif
-
- list_add(&m->list, &huge_boot_pages);
- gpage_freearray[idx].nr_gpages = nr_gpages;
- gpage_freearray[idx].gpage_list[nr_gpages] = 0;
- m->hstate = hstate;
-
- return 1;
-}
-/*
- * Scan the command line hugepagesz= options for gigantic pages; store those in
- * a list that we use to allocate the memory once all options are parsed.
- */
-
-unsigned long gpage_npages[MMU_PAGE_COUNT];
-
-static int __init do_gpage_early_setup(char *param, char *val,
- const char *unused, void *arg)
-{
- static phys_addr_t size;
- unsigned long npages;
-
- /*
- * The hugepagesz and hugepages cmdline options are interleaved. We
- * use the size variable to keep track of whether or not this was done
- * properly and skip over instances where it is incorrect. Other
- * command-line parsing code will issue warnings, so we don't need to.
- *
- */
- if ((strcmp(param, "default_hugepagesz") == 0) ||
- (strcmp(param, "hugepagesz") == 0)) {
- size = memparse(val, NULL);
- } else if (strcmp(param, "hugepages") == 0) {
- if (size != 0) {
- if (sscanf(val, "%lu", &npages) <= 0)
- npages = 0;
- if (npages > MAX_NUMBER_GPAGES) {
- pr_warn("MMU: %lu pages requested for page "
- "size %llu KB, limiting to "
- __stringify(MAX_NUMBER_GPAGES) "\n",
- npages, size / 1024);
- npages = MAX_NUMBER_GPAGES;
- }
- gpage_npages[shift_to_mmu_psize(__ffs(size))] = npages;
- size = 0;
- }
- }
- return 0;
-}
-
-
-/*
- * This function allocates physical space for pages that are larger than the
- * buddy allocator can handle. We want to allocate these in highmem because
- * the amount of lowmem is limited. This means that this function MUST be
- * called before lowmem_end_addr is set up in MMU_init() in order for the lmb
- * allocate to grab highmem.
- */
-void __init reserve_hugetlb_gpages(void)
-{
- static __initdata char cmdline[COMMAND_LINE_SIZE];
- phys_addr_t size, base;
- int i;
-
- strlcpy(cmdline, boot_command_line, COMMAND_LINE_SIZE);
- parse_args("hugetlb gpages", cmdline, NULL, 0, 0, 0,
- NULL, &do_gpage_early_setup);
-
- /*
- * Walk gpage list in reverse, allocating larger page sizes first.
- * Skip over unsupported sizes, or sizes that have 0 gpages allocated.
- * When we reach the point in the list where pages are no longer
- * considered gpages, we're done.
- */
- for (i = MMU_PAGE_COUNT-1; i >= 0; i--) {
- if (mmu_psize_defs[i].shift == 0 || gpage_npages[i] == 0)
- continue;
- else if (mmu_psize_to_shift(i) < (MAX_ORDER + PAGE_SHIFT))
- break;
-
- size = (phys_addr_t)(1ULL << mmu_psize_to_shift(i));
- base = memblock_alloc_base(size * gpage_npages[i], size,
- MEMBLOCK_ALLOC_ANYWHERE);
- add_gpage(base, size, gpage_npages[i]);
- }
-}
-
-#else /* !PPC_FSL_BOOK3E */
-
-/* Build list of addresses of gigantic pages. This function is used in early
- * boot before the buddy allocator is setup.
- */
-void add_gpage(u64 addr, u64 page_size, unsigned long number_of_pages)
-{
- if (!addr)
- return;
- while (number_of_pages > 0) {
- gpage_freearray[nr_gpages] = addr;
- nr_gpages++;
- number_of_pages--;
- addr += page_size;
- }
-}
-
-/* Moves the gigantic page addresses from the temporary list to the
- * huge_boot_pages list.
- */
-int alloc_bootmem_huge_page(struct hstate *hstate)
-{
- struct huge_bootmem_page *m;
- if (nr_gpages == 0)
- return 0;
- m = phys_to_virt(gpage_freearray[--nr_gpages]);
- gpage_freearray[nr_gpages] = 0;
- list_add(&m->list, &huge_boot_pages);
- m->hstate = hstate;
- return 1;
-}
-#endif
-
-#ifdef CONFIG_PPC_FSL_BOOK3E
-#define HUGEPD_FREELIST_SIZE \
- ((PAGE_SIZE - sizeof(struct hugepd_freelist)) / sizeof(pte_t))
-
-struct hugepd_freelist {
- struct rcu_head rcu;
- unsigned int index;
- void *ptes[0];
-};
-
-static DEFINE_PER_CPU(struct hugepd_freelist *, hugepd_freelist_cur);
-
-static void hugepd_free_rcu_callback(struct rcu_head *head)
-{
- struct hugepd_freelist *batch =
- container_of(head, struct hugepd_freelist, rcu);
- unsigned int i;
-
- for (i = 0; i < batch->index; i++)
- kmem_cache_free(hugepte_cache, batch->ptes[i]);
-
- free_page((unsigned long)batch);
-}
-
-static void hugepd_free(struct mmu_gather *tlb, void *hugepte)
-{
- struct hugepd_freelist **batchp;
-
- batchp = this_cpu_ptr(&hugepd_freelist_cur);
-
- if (atomic_read(&tlb->mm->mm_users) < 2 ||
- cpumask_equal(mm_cpumask(tlb->mm),
- cpumask_of(smp_processor_id()))) {
- kmem_cache_free(hugepte_cache, hugepte);
- put_cpu_var(hugepd_freelist_cur);
- return;
- }
-
- if (*batchp == NULL) {
- *batchp = (struct hugepd_freelist *)__get_free_page(GFP_ATOMIC);
- (*batchp)->index = 0;
- }
-
- (*batchp)->ptes[(*batchp)->index++] = hugepte;
- if ((*batchp)->index == HUGEPD_FREELIST_SIZE) {
- call_rcu_sched(&(*batchp)->rcu, hugepd_free_rcu_callback);
- *batchp = NULL;
- }
- put_cpu_var(hugepd_freelist_cur);
-}
-#endif
+extern void hugepd_free(struct mmu_gather *tlb, void *hugepte);
static void free_hugepd_range(struct mmu_gather *tlb, hugepd_t *hpdp, int
pdshift,
unsigned long start, unsigned long end,
unsigned long floor, unsigned long ceiling)
--
2.5.0
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