diff options
| author | Avi Kivity <avi@qumranet.com> | 2008-03-23 15:06:23 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-04-27 12:00:35 +0300 |
| commit | 0b49ea8659fd3b5005823e02d2d0a775521770e5 (patch) | |
| tree | 8ae968a018fac99eb923714e77ae87e02fe11d51 /arch/x86 | |
| parent | 855149aaa90016c576a0e684361a34f8047307d0 (diff) | |
KVM: MMU: Introduce and use spte_to_page()
Encapsulate the pte mask'n'shift in a function.
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index dd4b95b3896b..6fc342194dda 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -240,6 +240,13 @@ static int is_rmap_pte(u64 pte) return is_shadow_present_pte(pte); } +static struct page *spte_to_page(u64 pte) +{ + hfn_t hfn = (pte & PT64_BASE_ADDR_MASK) >> PAGE_SHIFT; + + return pfn_to_page(hfn); +} + static gfn_t pse36_gfn_delta(u32 gpte) { int shift = 32 - PT32_DIR_PSE36_SHIFT - PAGE_SHIFT; @@ -541,7 +548,7 @@ static void rmap_remove(struct kvm *kvm, u64 *spte) if (!is_rmap_pte(*spte)) return; sp = page_header(__pa(spte)); - page = pfn_to_page((*spte & PT64_BASE_ADDR_MASK) >> PAGE_SHIFT); + page = spte_to_page(*spte); mark_page_accessed(page); if (is_writeble_pte(*spte)) kvm_release_page_dirty(page); @@ -630,7 +637,7 @@ static void rmap_write_protect(struct kvm *kvm, u64 gfn) struct page *page; spte = rmap_next(kvm, rmapp, NULL); - page = pfn_to_page((*spte & PT64_BASE_ADDR_MASK) >> PAGE_SHIFT); + page = spte_to_page(*spte); SetPageDirty(page); } @@ -1033,7 +1040,6 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte, u64 spte; int was_rmapped = 0; int was_writeble = is_writeble_pte(*shadow_pte); - hfn_t host_pfn = (*shadow_pte & PT64_BASE_ADDR_MASK) >> PAGE_SHIFT; pgprintk("%s: spte %llx access %x write_fault %d" " user_fault %d gfn %lx\n", @@ -1051,9 +1057,10 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte, child = page_header(pte & PT64_BASE_ADDR_MASK); mmu_page_remove_parent_pte(child, shadow_pte); - } else if (host_pfn != page_to_pfn(page)) { + } else if (page != spte_to_page(*shadow_pte)) { pgprintk("hfn old %lx new %lx\n", - host_pfn, page_to_pfn(page)); + page_to_pfn(spte_to_page(*shadow_pte)), + page_to_pfn(page)); rmap_remove(vcpu->kvm, shadow_pte); } else { if (largepage) |