Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f9d46eb0e4a5b5e0926ca61c19f8c8bbb9496b28
Commit: f9d46eb0e4a5b5e0926ca61c19f8c8bbb9496b28
Parent: 1a6f4d7fbd11e539630cd5637311a4e55fae60ef
Author: Izik Eidus <[EMAIL PROTECTED]>
AuthorDate: Sun Nov 11 22:02:22 2007 +0200
Committer: Avi Kivity <[EMAIL PROTECTED]>
CommitDate: Wed Jan 30 17:53:01 2008 +0200
KVM: add kvm_is_error_hva()
Check for the "error hva", an address outside the user address space that
signals a bad gfn.
Signed-off-by: Izik Eidus <[EMAIL PROTECTED]>
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
---
drivers/kvm/kvm.h | 1 +
drivers/kvm/kvm_main.c | 11 +++++++++++
2 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index 3f5ffc3..6498324 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -520,6 +520,7 @@ struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
extern struct page *bad_page;
int is_error_page(struct page *page);
+int kvm_is_error_hva(unsigned long addr);
int kvm_set_memory_region(struct kvm *kvm,
struct kvm_userspace_memory_region *mem,
int user_alloc);
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index d395c98..dfb65e2 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -498,6 +498,17 @@ int is_error_page(struct page *page)
}
EXPORT_SYMBOL_GPL(is_error_page);
+static inline unsigned long bad_hva(void)
+{
+ return PAGE_OFFSET;
+}
+
+int kvm_is_error_hva(unsigned long addr)
+{
+ return addr == bad_hva();
+}
+EXPORT_SYMBOL_GPL(kvm_is_error_hva);
+
gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
{
int i;
-
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