In the later patch, it indicates failure when we try to get a writable
hva from the readonly slot
Signed-off-by: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxxxxxx>
---
virt/kvm/kvm_main.c | 12 +++++++++++-
1 files changed, 11 insertions(+), 1 deletions(-)
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index b70f1a4..c056736 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -994,9 +994,19 @@ static inline unsigned long bad_hva(void)
return PAGE_OFFSET;
}
+static inline unsigned long readonly_bad_hva(void)
+{
+ return PAGE_OFFSET + PAGE_SIZE;
+}
+
+static int kvm_is_readonly_bad_hva(unsigned long addr)
+{
+ return addr == readonly_bad_hva();
+}
+
int kvm_is_error_hva(unsigned long addr)
{
- return addr == bad_hva();
+ return addr == bad_hva() || kvm_is_readonly_bad_hva(addr);
}
EXPORT_SYMBOL_GPL(kvm_is_error_hva);
--
1.7.7.6
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