KVM: introduce KVM_HVA_ERR_RO_BAD

In the later patch, it indicates failure when we try to get a writable hva from the readonly memslot Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
mariux64 · Aug 22, 2012 · 7068d09 · 7068d09
1 parent ca3a490
commit 7068d09
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
@@ -82,11 +82,12 @@ static inline bool is_invalid_pfn(pfn_t pfn)
 	return !is_noslot_pfn(pfn) && is_error_pfn(pfn);
 }
 
-#define KVM_HVA_ERR_BAD	(PAGE_OFFSET)
+#define KVM_HVA_ERR_BAD		(PAGE_OFFSET)
+#define KVM_HVA_ERR_RO_BAD	(PAGE_OFFSET + PAGE_SIZE)
 
 static inline bool kvm_is_error_hva(unsigned long addr)
 {
-	return addr == PAGE_OFFSET;
+	return addr >= PAGE_OFFSET;
 }
 
 #define KVM_ERR_PTR_BAD_PAGE	(ERR_PTR(-ENOENT))