KVM: introduce KVM_HVA_ERR_RO_BAD
authorXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Tue, 21 Aug 2012 03:02:22 +0000 (11:02 +0800)
committerAvi Kivity <avi@redhat.com>
Wed, 22 Aug 2012 12:09:01 +0000 (15:09 +0300)
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>
include/linux/kvm_host.h

index b9bba60..a913ac7 100644 (file)
@@ -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))