diff options
| -rw-r--r-- | arch/powerpc/mm/hash_utils_64.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/mm/hugetlbpage.c | 35 | ||||
| -rw-r--r-- | include/asm-powerpc/mmu.h | 3 |
3 files changed, 37 insertions, 3 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index 706e8a63ced9..a33583f3b0e7 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -601,7 +601,7 @@ int hash_page(unsigned long ea, unsigned long access, unsigned long trap) /* Handle hugepage regions */ if (unlikely(in_hugepage_area(mm->context, ea))) { DBG_LOW(" -> huge page !\n"); - return hash_huge_page(mm, access, ea, vsid, local); + return hash_huge_page(mm, access, ea, vsid, local, trap); } /* Get PTE and page size from page tables */ diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index 8bce515dc320..97512b89e7b0 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -639,8 +639,36 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, return -ENOMEM; } +/* + * 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) +{ + struct page *page; + int i; + + if (!pfn_valid(pte_pfn(pte))) + return rflags; + + page = pte_page(pte); + + /* 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++) + __flush_dcache_icache(page_address(page+i)); + set_bit(PG_arch_1, &page->flags); + } else { + rflags |= HPTE_R_N; + } + } + return rflags; +} + int hash_huge_page(struct mm_struct *mm, unsigned long access, - unsigned long ea, unsigned long vsid, int local) + unsigned long ea, unsigned long vsid, int local, + unsigned long trap) { pte_t *ptep; unsigned long old_pte, new_pte; @@ -691,6 +719,11 @@ int hash_huge_page(struct mm_struct *mm, unsigned long access, rflags = 0x2 | (!(new_pte & _PAGE_RW)); /* _PAGE_EXEC -> HW_NO_EXEC since it's inverted */ rflags |= ((new_pte & _PAGE_EXEC) ? 0 : HPTE_R_N); + 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); /* Check if pte already has an hpte (case 2) */ if (unlikely(old_pte & _PAGE_HASHPTE)) { diff --git a/include/asm-powerpc/mmu.h b/include/asm-powerpc/mmu.h index c1b4bbabbe97..29b0bb0086d3 100644 --- a/include/asm-powerpc/mmu.h +++ b/include/asm-powerpc/mmu.h @@ -220,7 +220,8 @@ extern int __hash_page_64K(unsigned long ea, unsigned long access, unsigned int local); struct mm_struct; extern int hash_huge_page(struct mm_struct *mm, unsigned long access, - unsigned long ea, unsigned long vsid, int local); + unsigned long ea, unsigned long vsid, int local, + unsigned long trap); extern void htab_finish_init(void); extern int htab_bolt_mapping(unsigned long vstart, unsigned long vend, |