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authorAvi Kivity <avi@qumranet.com>2007-05-30 16:31:17 (GMT)
committerAvi Kivity <avi@qumranet.com>2007-07-16 09:05:43 (GMT)
commite60d75ea292071e7ab33c10ca73fdd33fcbbe501 (patch)
tree85ca6a1b9f0dca02ec166acca4627127312ecf8e /drivers/kvm/paging_tmpl.h
parentef0197e8d9273ad8fbfb1bbd30e46e42a32c79e8 (diff)
downloadlinux-e60d75ea292071e7ab33c10ca73fdd33fcbbe501.tar.xz
KVM: MMU: Move set_pte_common() to pte width dependent code
In preparation of some modifications. Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/paging_tmpl.h')
-rw-r--r--drivers/kvm/paging_tmpl.h56
1 files changed, 52 insertions, 4 deletions
diff --git a/drivers/kvm/paging_tmpl.h b/drivers/kvm/paging_tmpl.h
index e094a8b..6576300 100644
--- a/drivers/kvm/paging_tmpl.h
+++ b/drivers/kvm/paging_tmpl.h
@@ -192,14 +192,62 @@ static void FNAME(mark_pagetable_dirty)(struct kvm *kvm,
mark_page_dirty(kvm, walker->table_gfn[walker->level - 1]);
}
+static void FNAME(set_pte_common)(struct kvm_vcpu *vcpu,
+ u64 *shadow_pte,
+ gpa_t gaddr,
+ int dirty,
+ u64 access_bits,
+ gfn_t gfn)
+{
+ hpa_t paddr;
+
+ *shadow_pte |= access_bits << PT_SHADOW_BITS_OFFSET;
+ if (!dirty)
+ access_bits &= ~PT_WRITABLE_MASK;
+
+ paddr = gpa_to_hpa(vcpu, gaddr & PT64_BASE_ADDR_MASK);
+
+ *shadow_pte |= access_bits;
+
+ if (is_error_hpa(paddr)) {
+ *shadow_pte |= gaddr;
+ *shadow_pte |= PT_SHADOW_IO_MARK;
+ *shadow_pte &= ~PT_PRESENT_MASK;
+ return;
+ }
+
+ *shadow_pte |= paddr;
+
+ if (access_bits & PT_WRITABLE_MASK) {
+ struct kvm_mmu_page *shadow;
+
+ shadow = kvm_mmu_lookup_page(vcpu, gfn);
+ if (shadow) {
+ pgprintk("%s: found shadow page for %lx, marking ro\n",
+ __FUNCTION__, gfn);
+ access_bits &= ~PT_WRITABLE_MASK;
+ if (is_writeble_pte(*shadow_pte)) {
+ *shadow_pte &= ~PT_WRITABLE_MASK;
+ kvm_arch_ops->tlb_flush(vcpu);
+ }
+ }
+ }
+
+ if (access_bits & PT_WRITABLE_MASK)
+ mark_page_dirty(vcpu->kvm, gaddr >> PAGE_SHIFT);
+
+ page_header_update_slot(vcpu->kvm, shadow_pte, gaddr);
+ rmap_add(vcpu, shadow_pte);
+}
+
static void FNAME(set_pte)(struct kvm_vcpu *vcpu, u64 guest_pte,
u64 *shadow_pte, u64 access_bits, gfn_t gfn)
{
ASSERT(*shadow_pte == 0);
access_bits &= guest_pte;
*shadow_pte = (guest_pte & PT_PTE_COPY_MASK);
- set_pte_common(vcpu, shadow_pte, guest_pte & PT_BASE_ADDR_MASK,
- guest_pte & PT_DIRTY_MASK, access_bits, gfn);
+ FNAME(set_pte_common)(vcpu, shadow_pte, guest_pte & PT_BASE_ADDR_MASK,
+ guest_pte & PT_DIRTY_MASK, access_bits, gfn);
}
static void FNAME(update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *page,
@@ -229,8 +277,8 @@ static void FNAME(set_pde)(struct kvm_vcpu *vcpu, u64 guest_pde,
gaddr |= (guest_pde & PT32_DIR_PSE36_MASK) <<
(32 - PT32_DIR_PSE36_SHIFT);
*shadow_pte = guest_pde & PT_PTE_COPY_MASK;
- set_pte_common(vcpu, shadow_pte, gaddr,
- guest_pde & PT_DIRTY_MASK, access_bits, gfn);
+ FNAME(set_pte_common)(vcpu, shadow_pte, gaddr,
+ guest_pde & PT_DIRTY_MASK, access_bits, gfn);
}
/*