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-rw-r--r--arch/powerpc/mm/hugetlbpage.c117
1 files changed, 74 insertions, 43 deletions
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index 5964371303a..a8b3cc7d90f 100644
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c
@@ -15,6 +15,7 @@
#include <linux/of_fdt.h>
#include <linux/memblock.h>
#include <linux/bootmem.h>
+#include <linux/moduleparam.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/tlb.h>
@@ -28,22 +29,22 @@ unsigned int HPAGE_SHIFT;
/*
* Tracks gpages after the device tree is scanned and before the
- * huge_boot_pages list is ready. On 64-bit implementations, this is
- * just used to track 16G pages and so is a single array. 32-bit
- * implementations may have more than one gpage size due to limitations
- * of the memory allocators, so we need multiple arrays
+ * 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_PPC64
-#define MAX_NUMBER_GPAGES 1024
-static u64 gpage_freearray[MAX_NUMBER_GPAGES];
-static unsigned nr_gpages;
-#else
+#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
static inline int shift_to_mmu_psize(unsigned int shift)
@@ -114,12 +115,12 @@ static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp,
struct kmem_cache *cachep;
pte_t *new;
-#ifdef CONFIG_PPC64
- cachep = PGT_CACHE(pdshift - pshift);
-#else
+#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);
@@ -131,12 +132,7 @@ static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp,
return -ENOMEM;
spin_lock(&mm->page_table_lock);
-#ifdef CONFIG_PPC64
- if (!hugepd_none(*hpdp))
- kmem_cache_free(cachep, new);
- else
- hpdp->pd = ((unsigned long)new & ~PD_HUGE) | pshift;
-#else
+#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.
@@ -155,11 +151,28 @@ static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp,
hpdp->pd = 0;
kmem_cache_free(cachep, new);
}
+#else
+ if (!hugepd_none(*hpdp))
+ kmem_cache_free(cachep, new);
+ else
+ hpdp->pd = ((unsigned long)new & ~PD_HUGE) | pshift;
#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
+
pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz)
{
pgd_t *pg;
@@ -172,12 +185,13 @@ pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz
addr &= ~(sz-1);
pg = pgd_offset(mm, addr);
- if (pshift >= PUD_SHIFT) {
+
+ if (pshift >= HUGEPD_PGD_SHIFT) {
hpdp = (hugepd_t *)pg;
} else {
pdshift = PUD_SHIFT;
pu = pud_alloc(mm, pg, addr);
- if (pshift >= PMD_SHIFT) {
+ if (pshift >= HUGEPD_PUD_SHIFT) {
hpdp = (hugepd_t *)pu;
} else {
pdshift = PMD_SHIFT;
@@ -197,7 +211,7 @@ pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz
return hugepte_offset(hpdp, addr, pdshift);
}
-#ifdef CONFIG_PPC32
+#ifdef CONFIG_PPC_FSL_BOOK3E
/* Build list of addresses of gigantic pages. This function is used in early
* boot before the buddy or bootmem allocator is setup.
*/
@@ -317,7 +331,7 @@ void __init reserve_hugetlb_gpages(void)
}
}
-#else /* PPC64 */
+#else /* !PPC_FSL_BOOK3E */
/* Build list of addresses of gigantic pages. This function is used in early
* boot before the buddy or bootmem allocator is setup.
@@ -355,7 +369,7 @@ int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
return 0;
}
-#ifdef CONFIG_PPC32
+#ifdef CONFIG_PPC_FSL_BOOK3E
#define HUGEPD_FREELIST_SIZE \
((PAGE_SIZE - sizeof(struct hugepd_freelist)) / sizeof(pte_t))
@@ -415,11 +429,11 @@ static void free_hugepd_range(struct mmu_gather *tlb, hugepd_t *hpdp, int pdshif
unsigned long pdmask = ~((1UL << pdshift) - 1);
unsigned int num_hugepd = 1;
-#ifdef CONFIG_PPC64
- unsigned int shift = hugepd_shift(*hpdp);
-#else
- /* Note: On 32-bit the hpdp may be the first of several */
+#ifdef CONFIG_PPC_FSL_BOOK3E
+ /* Note: On fsl the hpdp may be the first of several */
num_hugepd = (1 << (hugepd_shift(*hpdp) - pdshift));
+#else
+ unsigned int shift = hugepd_shift(*hpdp);
#endif
start &= pdmask;
@@ -437,10 +451,11 @@ static void free_hugepd_range(struct mmu_gather *tlb, hugepd_t *hpdp, int pdshif
hpdp->pd = 0;
tlb->need_flush = 1;
-#ifdef CONFIG_PPC64
- pgtable_free_tlb(tlb, hugepte, pdshift - shift);
-#else
+
+#ifdef CONFIG_PPC_FSL_BOOK3E
hugepd_free(tlb, hugepte);
+#else
+ pgtable_free_tlb(tlb, hugepte, pdshift - shift);
#endif
}
@@ -453,14 +468,23 @@ static void hugetlb_free_pmd_range(struct mmu_gather *tlb, pud_t *pud,
unsigned long start;
start = addr;
- pmd = pmd_offset(pud, addr);
do {
+ pmd = pmd_offset(pud, addr);
next = pmd_addr_end(addr, end);
if (pmd_none(*pmd))
continue;
+#ifdef CONFIG_PPC_FSL_BOOK3E
+ /*
+ * Increment next by the size of the huge mapping since
+ * there may be more than one entry at this level for a
+ * single hugepage, but all of them point to
+ * the same kmem cache that holds the hugepte.
+ */
+ next = addr + (1 << hugepd_shift(*(hugepd_t *)pmd));
+#endif
free_hugepd_range(tlb, (hugepd_t *)pmd, PMD_SHIFT,
addr, next, floor, ceiling);
- } while (pmd++, addr = next, addr != end);
+ } while (addr = next, addr != end);
start &= PUD_MASK;
if (start < floor)
@@ -487,8 +511,8 @@ static void hugetlb_free_pud_range(struct mmu_gather *tlb, pgd_t *pgd,
unsigned long start;
start = addr;
- pud = pud_offset(pgd, addr);
do {
+ pud = pud_offset(pgd, addr);
next = pud_addr_end(addr, end);
if (!is_hugepd(pud)) {
if (pud_none_or_clear_bad(pud))
@@ -496,10 +520,19 @@ static void hugetlb_free_pud_range(struct mmu_gather *tlb, pgd_t *pgd,
hugetlb_free_pmd_range(tlb, pud, addr, next, floor,
ceiling);
} else {
+#ifdef CONFIG_PPC_FSL_BOOK3E
+ /*
+ * Increment next by the size of the huge mapping since
+ * there may be more than one entry at this level for a
+ * single hugepage, but all of them point to
+ * the same kmem cache that holds the hugepte.
+ */
+ next = addr + (1 << hugepd_shift(*(hugepd_t *)pud));
+#endif
free_hugepd_range(tlb, (hugepd_t *)pud, PUD_SHIFT,
addr, next, floor, ceiling);
}
- } while (pud++, addr = next, addr != end);
+ } while (addr = next, addr != end);
start &= PGDIR_MASK;
if (start < floor)
@@ -554,12 +587,12 @@ void hugetlb_free_pgd_range(struct mmu_gather *tlb,
continue;
hugetlb_free_pud_range(tlb, pgd, addr, next, floor, ceiling);
} else {
-#ifdef CONFIG_PPC32
+#ifdef CONFIG_PPC_FSL_BOOK3E
/*
* Increment next by the size of the huge mapping since
- * on 32-bit there may be more than one entry at the pgd
- * level for a single hugepage, but all of them point to
- * the same kmem cache that holds the hugepte.
+ * there may be more than one entry at the pgd level
+ * for a single hugepage, but all of them point to the
+ * same kmem cache that holds the hugepte.
*/
next = addr + (1 << hugepd_shift(*(hugepd_t *)pgd));
#endif
@@ -697,19 +730,17 @@ int gup_hugepd(hugepd_t *hugepd, unsigned pdshift,
return 1;
}
+#ifdef CONFIG_PPC_MM_SLICES
unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
unsigned long len, unsigned long pgoff,
unsigned long flags)
{
-#ifdef CONFIG_PPC_MM_SLICES
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);
-#else
- return get_unmapped_area(file, addr, len, pgoff, flags);
-#endif
}
+#endif
unsigned long vma_mmu_pagesize(struct vm_area_struct *vma)
{
@@ -783,7 +814,7 @@ static int __init hugepage_setup_sz(char *str)
}
__setup("hugepagesz=", hugepage_setup_sz);
-#ifdef CONFIG_FSL_BOOKE
+#ifdef CONFIG_PPC_FSL_BOOK3E
struct kmem_cache *hugepte_cache;
static int __init hugetlbpage_init(void)
{
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-21 18:45:50 +0000