[PATCH RFC v2 05/12] xen/mem_access: Abstract architecture specific sanity check

[Tamas K Lengyel <tklengyel@sec.in.tum.de>]

Signed-off-by: Tamas K Lengyel <tklengyel@sec.in.tum.de>
---
 xen/common/mem_access.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/xen/common/mem_access.c b/xen/common/mem_access.c
index 84acdf9..2bb3171 100644
--- a/xen/common/mem_access.c
+++ b/xen/common/mem_access.c
@@ -30,6 +30,12 @@
 #include <xsm/xsm.h>
 
 #ifdef CONFIG_X86
+static inline bool_t mem_access_sanity_check(struct domain *d)
+{
+    if ( !is_hvm_domain(d) )
+        return 0;
+    return 1;
+}
 
 int mem_access_memop(unsigned long cmd,
                      XEN_GUEST_HANDLE_PARAM(xen_mem_access_op_t) arg)
@@ -45,9 +51,11 @@ int mem_access_memop(unsigned long cmd,
     if ( rc )
         return rc;
 
-    rc = -EINVAL;
-    if ( !is_hvm_domain(d) )
+    if ( !mem_access_sanity_check(d) )
+    {
+        rc = -EINVAL;
         goto out;
+    }
 
     rc = xsm_mem_event_op(XSM_DM_PRIV, d, XENMEM_access_op);
     if ( rc )
-- 
2.1.0.rc1