diff options
| author | nwhitehorn <nwhitehorn@FreeBSD.org> | 2012-03-24 22:32:19 +0000 |
|---|---|---|
| committer | nwhitehorn <nwhitehorn@FreeBSD.org> | 2012-03-24 22:32:19 +0000 |
| commit | 30ea2f9f8629b61aa7e750ff6012a54b9912b1a8 (patch) | |
| tree | bbcb6c99be44e1229f4b496df0d9ee7060930828 /sys/powerpc/aim | |
| parent | f471f92e45c62ed6880b7610b1cc2567ad4267b1 (diff) | |
| download | FreeBSD-src-30ea2f9f8629b61aa7e750ff6012a54b9912b1a8.zip FreeBSD-src-30ea2f9f8629b61aa7e750ff6012a54b9912b1a8.tar.gz | |
Only call vm_page_dirty() on pages that are writable in order not to
confuse the VM.
Diffstat (limited to 'sys/powerpc/aim')
| -rw-r--r-- | sys/powerpc/aim/mmu_oea64.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/sys/powerpc/aim/mmu_oea64.c b/sys/powerpc/aim/mmu_oea64.c index 5356cfe..6251d79 100644 --- a/sys/powerpc/aim/mmu_oea64.c +++ b/sys/powerpc/aim/mmu_oea64.c @@ -1889,6 +1889,7 @@ static void moea64_pvo_protect(mmu_t mmu, pmap_t pm, struct pvo_entry *pvo, vm_prot_t prot) { uintptr_t pt; + uint64_t oldlo; /* * Grab the PTE pointer before we diddle with the cached PTE @@ -1900,11 +1901,15 @@ moea64_pvo_protect(mmu_t mmu, pmap_t pm, struct pvo_entry *pvo, vm_prot_t prot) /* * Change the protection of the page. */ + oldlo = pvo->pvo_pte.lpte.pte_lo; pvo->pvo_pte.lpte.pte_lo &= ~LPTE_PP; - pvo->pvo_pte.lpte.pte_lo |= LPTE_BR; pvo->pvo_pte.lpte.pte_lo &= ~LPTE_NOEXEC; if ((prot & VM_PROT_EXECUTE) == 0) pvo->pvo_pte.lpte.pte_lo |= LPTE_NOEXEC; + if (prot & VM_PROT_WRITE) + pvo->pvo_pte.lpte.pte_lo |= LPTE_BW; + else + pvo->pvo_pte.lpte.pte_lo |= LPTE_BR; /* * If the PVO is in the page table, update that pte as well. @@ -1921,9 +1926,11 @@ moea64_pvo_protect(mmu_t mmu, pmap_t pm, struct pvo_entry *pvo, vm_prot_t prot) } /* - * Update vm about the REF/CHG bits if the page is managed. + * Update vm about the REF/CHG bits if the page is managed and we have + * removed write access. */ - if ((pvo->pvo_vaddr & PVO_MANAGED) == PVO_MANAGED) { + if ((pvo->pvo_vaddr & PVO_MANAGED) == PVO_MANAGED && + (oldlo & LPTE_PP) != LPTE_BR && !(prot && VM_PROT_WRITE)) { struct vm_page *pg; pg = PHYS_TO_VM_PAGE(pvo->pvo_pte.lpte.pte_lo & LPTE_RPGN); @@ -2345,7 +2352,8 @@ moea64_pvo_remove(mmu_t mmu, struct pvo_entry *pvo) /* * Update vm about the REF/CHG bits if the page is managed. */ - if ((pvo->pvo_vaddr & PVO_MANAGED) == PVO_MANAGED) { + if ((pvo->pvo_vaddr & PVO_MANAGED) == PVO_MANAGED && + (pvo->pvo_pte.lpte.pte_lo & LPTE_PP) != LPTE_BR) { struct vm_page *pg; pg = PHYS_TO_VM_PAGE(pvo->pvo_pte.lpte.pte_lo & LPTE_RPGN); |
