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-rw-r--r--arch/sparc/include/asm/hugetlb.h12
-rw-r--r--arch/sparc/include/asm/pgtable_64.h7
-rw-r--r--arch/sparc/include/asm/tsb.h2
-rw-r--r--arch/sparc/mm/fault_64.c4
-rw-r--r--arch/sparc/mm/hugetlbpage.c166
-rw-r--r--arch/sparc/mm/init_64.c6
6 files changed, 129 insertions, 68 deletions
diff --git a/arch/sparc/include/asm/hugetlb.h b/arch/sparc/include/asm/hugetlb.h
index 139e711ff80c..dcbf985ab243 100644
--- a/arch/sparc/include/asm/hugetlb.h
+++ b/arch/sparc/include/asm/hugetlb.h
@@ -31,14 +31,6 @@ static inline int prepare_hugepage_range(struct file *file,
return 0;
}
-static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
- unsigned long addr, unsigned long end,
- unsigned long floor,
- unsigned long ceiling)
-{
- free_pgd_range(tlb, addr, end, floor, ceiling);
-}
-
static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep)
{
@@ -82,4 +74,8 @@ static inline void arch_clear_hugepage_flags(struct page *page)
{
}
+void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
+ unsigned long end, unsigned long floor,
+ unsigned long ceiling);
+
#endif /* _ASM_SPARC64_HUGETLB_H */
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index e7d82803a48f..1fb317fbc0b3 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h
@@ -395,7 +395,7 @@ static inline unsigned long __pte_huge_mask(void)
static inline pte_t pte_mkhuge(pte_t pte)
{
- return __pte(pte_val(pte) | __pte_huge_mask());
+ return __pte(pte_val(pte) | _PAGE_PMD_HUGE | __pte_huge_mask());
}
static inline bool is_hugetlb_pte(pte_t pte)
@@ -403,6 +403,11 @@ static inline bool is_hugetlb_pte(pte_t pte)
return !!(pte_val(pte) & __pte_huge_mask());
}
+static inline bool is_hugetlb_pmd(pmd_t pmd)
+{
+ return !!(pmd_val(pmd) & _PAGE_PMD_HUGE);
+}
+
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
static inline pmd_t pmd_mkhuge(pmd_t pmd)
{
diff --git a/arch/sparc/include/asm/tsb.h b/arch/sparc/include/asm/tsb.h
index c6a155c3904e..32258e08da03 100644
--- a/arch/sparc/include/asm/tsb.h
+++ b/arch/sparc/include/asm/tsb.h
@@ -203,7 +203,7 @@ extern struct tsb_phys_patch_entry __tsb_phys_patch, __tsb_phys_patch_end;
* We have to propagate the 4MB bit of the virtual address
* because we are fabricating 8MB pages using 4MB hw pages.
*/
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
#define USER_PGTABLE_CHECK_PMD_HUGE(VADDR, REG1, REG2, FAIL_LABEL, PTE_LABEL) \
brz,pn REG1, FAIL_LABEL; \
sethi %uhi(_PAGE_PMD_HUGE), REG2; \
diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c
index 3a16ba0dc356..e16fdd28a931 100644
--- a/arch/sparc/mm/fault_64.c
+++ b/arch/sparc/mm/fault_64.c
@@ -111,8 +111,8 @@ static unsigned int get_user_insn(unsigned long tpc)
if (pmd_none(*pmdp) || unlikely(pmd_bad(*pmdp)))
goto out_irq_enable;
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- if (pmd_trans_huge(*pmdp)) {
+#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
+ if (is_hugetlb_pmd(*pmdp)) {
pa = pmd_pfn(*pmdp) << PAGE_SHIFT;
pa += tpc & ~HPAGE_MASK;
diff --git a/arch/sparc/mm/hugetlbpage.c b/arch/sparc/mm/hugetlbpage.c
index d69b66e01b84..988acc8b1b80 100644
--- a/arch/sparc/mm/hugetlbpage.c
+++ b/arch/sparc/mm/hugetlbpage.c
@@ -12,6 +12,7 @@
#include <asm/mman.h>
#include <asm/pgalloc.h>
+#include <asm/pgtable.h>
#include <asm/tlb.h>
#include <asm/tlbflush.h>
#include <asm/cacheflush.h>
@@ -131,23 +132,13 @@ pte_t *huge_pte_alloc(struct mm_struct *mm,
{
pgd_t *pgd;
pud_t *pud;
- pmd_t *pmd;
pte_t *pte = NULL;
- /* We must align the address, because our caller will run
- * set_huge_pte_at() on whatever we return, which writes out
- * all of the sub-ptes for the hugepage range. So we have
- * to give it the first such sub-pte.
- */
- addr &= HPAGE_MASK;
-
pgd = pgd_offset(mm, addr);
pud = pud_alloc(mm, pgd, addr);
- if (pud) {
- pmd = pmd_alloc(mm, pud, addr);
- if (pmd)
- pte = pte_alloc_map(mm, pmd, addr);
- }
+ if (pud)
+ pte = (pte_t *)pmd_alloc(mm, pud, addr);
+
return pte;
}
@@ -155,19 +146,13 @@ pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
{
pgd_t *pgd;
pud_t *pud;
- pmd_t *pmd;
pte_t *pte = NULL;
- addr &= HPAGE_MASK;
-
pgd = pgd_offset(mm, addr);
if (!pgd_none(*pgd)) {
pud = pud_offset(pgd, addr);
- if (!pud_none(*pud)) {
- pmd = pmd_offset(pud, addr);
- if (!pmd_none(*pmd))
- pte = pte_offset_map(pmd, addr);
- }
+ if (!pud_none(*pud))
+ pte = (pte_t *)pmd_offset(pud, addr);
}
return pte;
}
@@ -175,70 +160,143 @@ pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t entry)
{
- int i;
- pte_t orig[2];
- unsigned long nptes;
+ pte_t orig;
if (!pte_present(*ptep) && pte_present(entry))
mm->context.hugetlb_pte_count++;
addr &= HPAGE_MASK;
-
- nptes = 1 << HUGETLB_PAGE_ORDER;
- orig[0] = *ptep;
- orig[1] = *(ptep + nptes / 2);
- for (i = 0; i < nptes; i++) {
- *ptep = entry;
- ptep++;
- addr += PAGE_SIZE;
- pte_val(entry) += PAGE_SIZE;
- }
+ orig = *ptep;
+ *ptep = entry;
/* Issue TLB flush at REAL_HPAGE_SIZE boundaries */
- addr -= REAL_HPAGE_SIZE;
- ptep -= nptes / 2;
- maybe_tlb_batch_add(mm, addr, ptep, orig[1], 0);
- addr -= REAL_HPAGE_SIZE;
- ptep -= nptes / 2;
- maybe_tlb_batch_add(mm, addr, ptep, orig[0], 0);
+ maybe_tlb_batch_add(mm, addr, ptep, orig, 0);
+ maybe_tlb_batch_add(mm, addr + REAL_HPAGE_SIZE, ptep, orig, 0);
}
pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
pte_t *ptep)
{
pte_t entry;
- int i;
- unsigned long nptes;
entry = *ptep;
if (pte_present(entry))
mm->context.hugetlb_pte_count--;
addr &= HPAGE_MASK;
- nptes = 1 << HUGETLB_PAGE_ORDER;
- for (i = 0; i < nptes; i++) {
- *ptep = __pte(0UL);
- addr += PAGE_SIZE;
- ptep++;
- }
+ *ptep = __pte(0UL);
/* Issue TLB flush at REAL_HPAGE_SIZE boundaries */
- addr -= REAL_HPAGE_SIZE;
- ptep -= nptes / 2;
- maybe_tlb_batch_add(mm, addr, ptep, entry, 0);
- addr -= REAL_HPAGE_SIZE;
- ptep -= nptes / 2;
maybe_tlb_batch_add(mm, addr, ptep, entry, 0);
+ maybe_tlb_batch_add(mm, addr + REAL_HPAGE_SIZE, ptep, entry, 0);
return entry;
}
int pmd_huge(pmd_t pmd)
{
- return 0;
+ return !pmd_none(pmd) &&
+ (pmd_val(pmd) & (_PAGE_VALID|_PAGE_PMD_HUGE)) != _PAGE_VALID;
}
int pud_huge(pud_t pud)
{
return 0;
}
+
+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);
+ atomic_long_dec(&tlb->mm->nr_ptes);
+}
+
+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)
+{
+ pmd_t *pmd;
+ unsigned long next;
+ unsigned long start;
+
+ start = addr;
+ pmd = pmd_offset(pud, addr);
+ do {
+ next = pmd_addr_end(addr, end);
+ if (pmd_none(*pmd))
+ continue;
+ if (is_hugetlb_pmd(*pmd))
+ pmd_clear(pmd);
+ else
+ hugetlb_free_pte_range(tlb, pmd, addr);
+ } while (pmd++, addr = next, addr != end);
+
+ start &= PUD_MASK;
+ if (start < floor)
+ return;
+ if (ceiling) {
+ ceiling &= PUD_MASK;
+ if (!ceiling)
+ return;
+ }
+ if (end - 1 > ceiling - 1)
+ return;
+
+ pmd = pmd_offset(pud, start);
+ pud_clear(pud);
+ pmd_free_tlb(tlb, pmd, start);
+ mm_dec_nr_pmds(tlb->mm);
+}
+
+static void hugetlb_free_pud_range(struct mmu_gather *tlb, pgd_t *pgd,
+ unsigned long addr, unsigned long end,
+ unsigned long floor, unsigned long ceiling)
+{
+ pud_t *pud;
+ unsigned long next;
+ unsigned long start;
+
+ start = addr;
+ pud = pud_offset(pgd, addr);
+ do {
+ next = pud_addr_end(addr, end);
+ if (pud_none_or_clear_bad(pud))
+ continue;
+ hugetlb_free_pmd_range(tlb, pud, addr, next, floor,
+ ceiling);
+ } while (pud++, addr = next, addr != end);
+
+ start &= PGDIR_MASK;
+ if (start < floor)
+ return;
+ if (ceiling) {
+ ceiling &= PGDIR_MASK;
+ if (!ceiling)
+ return;
+ }
+ if (end - 1 > ceiling - 1)
+ return;
+
+ pud = pud_offset(pgd, start);
+ pgd_clear(pgd);
+ pud_free_tlb(tlb, pud, start);
+}
+
+void hugetlb_free_pgd_range(struct mmu_gather *tlb,
+ unsigned long addr, unsigned long end,
+ unsigned long floor, unsigned long ceiling)
+{
+ pgd_t *pgd;
+ unsigned long next;
+
+ pgd = pgd_offset(tlb->mm, addr);
+ do {
+ next = pgd_addr_end(addr, end);
+ if (pgd_none_or_clear_bad(pgd))
+ continue;
+ hugetlb_free_pud_range(tlb, pgd, addr, next, floor, ceiling);
+ } while (pgd++, addr = next, addr != end);
+}
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index aef153f9fdac..65457c9f1365 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -347,10 +347,12 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *
#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
if ((mm->context.hugetlb_pte_count || mm->context.thp_pte_count) &&
- is_hugetlb_pte(pte))
+ is_hugetlb_pte(pte)) {
+ /* We are fabricating 8MB pages using 4MB real hw pages. */
+ pte_val(pte) |= (address & (1UL << REAL_HPAGE_SHIFT));
__update_mmu_tsb_insert(mm, MM_TSB_HUGE, REAL_HPAGE_SHIFT,
address, pte_val(pte));
- else
+ } else
#endif
__update_mmu_tsb_insert(mm, MM_TSB_BASE, PAGE_SHIFT,
address, pte_val(pte));
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-21 05:47:25 +0000