diff options
Diffstat (limited to 'arch/powerpc/mm/pgtable.c')
| -rw-r--r-- | arch/powerpc/mm/pgtable.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/arch/powerpc/mm/pgtable.c b/arch/powerpc/mm/pgtable.c index de37ff445362..88a307504b5a 100644 --- a/arch/powerpc/mm/pgtable.c +++ b/arch/powerpc/mm/pgtable.c @@ -38,14 +38,25 @@ static inline int is_exec_fault(void) /* We only try to do i/d cache coherency on stuff that looks like * reasonably "normal" PTEs. We currently require a PTE to be present - * and we avoid _PAGE_SPECIAL and _PAGE_NO_CACHE. We also only do that + * and we avoid _PAGE_SPECIAL and cache inhibited pte. We also only do that * on userspace PTEs */ static inline int pte_looks_normal(pte_t pte) { + +#if defined(CONFIG_PPC_BOOK3S_64) + if ((pte_val(pte) & (_PAGE_PRESENT | _PAGE_SPECIAL)) == _PAGE_PRESENT) { + if (pte_ci(pte)) + return 0; + if (pte_user(pte)) + return 1; + } + return 0; +#else return (pte_val(pte) & - (_PAGE_PRESENT | _PAGE_SPECIAL | _PAGE_NO_CACHE | _PAGE_USER)) == - (_PAGE_PRESENT | _PAGE_USER); + (_PAGE_PRESENT | _PAGE_SPECIAL | _PAGE_NO_CACHE | _PAGE_USER)) == + (_PAGE_PRESENT | _PAGE_USER); +#endif } static struct page *maybe_pte_to_page(pte_t pte) @@ -71,6 +82,9 @@ static struct page *maybe_pte_to_page(pte_t pte) static pte_t set_pte_filter(pte_t pte) { + if (radix_enabled()) + return pte; + pte = __pte(pte_val(pte) & ~_PAGE_HPTEFLAGS); if (pte_looks_normal(pte) && !(cpu_has_feature(CPU_FTR_COHERENT_ICACHE) || cpu_has_feature(CPU_FTR_NOEXECUTE))) { @@ -177,8 +191,8 @@ void set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, * _PAGE_PRESENT, but we can be sure that it is not in hpte. * Hence we can use set_pte_at for them. */ - VM_WARN_ON((pte_val(*ptep) & (_PAGE_PRESENT | _PAGE_USER)) == - (_PAGE_PRESENT | _PAGE_USER)); + VM_WARN_ON(pte_present(*ptep) && !pte_protnone(*ptep)); + /* * Add the pte bit when tryint set a pte */ |