Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=143646567f6dcd584e1ab359b5ec83e0545e70cf
Commit: 143646567f6dcd584e1ab359b5ec83e0545e70cf
Parent: 32b35627355c3bf17e1903efd117efed7653a54e
Author: Avi Kivity <[EMAIL PROTECTED]>
AuthorDate: Fri Jan 5 16:36:52 2007 -0800
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Fri Jan 5 23:55:26 2007 -0800
[PATCH] KVM: MMU: Treat user-mode faults as a hint that a page is no longer
a page table
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
Acked-by: Ingo Molnar <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
drivers/kvm/paging_tmpl.h | 13 ++++++++++++-
1 files changed, 12 insertions(+), 1 deletions(-)
diff --git a/drivers/kvm/paging_tmpl.h b/drivers/kvm/paging_tmpl.h
index 03c474a..6acb16e 100644
--- a/drivers/kvm/paging_tmpl.h
+++ b/drivers/kvm/paging_tmpl.h
@@ -271,6 +271,7 @@ static int FNAME(fix_write_pf)(struct kvm_vcpu *vcpu,
pt_element_t *guest_ent;
int writable_shadow;
gfn_t gfn;
+ struct kvm_mmu_page *page;
if (is_writeble_pte(*shadow_ent))
return 0;
@@ -303,7 +304,17 @@ static int FNAME(fix_write_pf)(struct kvm_vcpu *vcpu,
}
gfn = walker->gfn;
- if (kvm_mmu_lookup_page(vcpu, gfn)) {
+
+ if (user) {
+ /*
+ * Usermode page faults won't be for page table updates.
+ */
+ while ((page = kvm_mmu_lookup_page(vcpu, gfn)) != NULL) {
+ pgprintk("%s: zap %lx %x\n",
+ __FUNCTION__, gfn, page->role.word);
+ kvm_mmu_zap_page(vcpu, page);
+ }
+ } else if (kvm_mmu_lookup_page(vcpu, gfn)) {
pgprintk("%s: found shadow page for %lx, marking ro\n",
__FUNCTION__, gfn);
*write_pt = 1;
-
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