[Xen-devel] [PATCH 10/25] arm: introduce guest_handle_for_field()

[Christopher Clark <christopher.w.clark@xxxxxxxxx>]

arm port of commit bb544585137259545d4adc9afe6eed8dc7c7376d

This helper turns a field of a GUEST_HANDLE into a GUEST_HANDLE.

Signed-off-by: Christopher Clark <christopher.clark6@xxxxxxxxxxxxxx>
---
 xen/include/asm-arm/guest_access.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/xen/include/asm-arm/guest_access.h 
b/xen/include/asm-arm/guest_access.h
index 7b6f89c..1137c54 100644
--- a/xen/include/asm-arm/guest_access.h
+++ b/xen/include/asm-arm/guest_access.h
@@ -68,6 +68,9 @@ int access_guest_memory_by_ipa(struct domain *d, paddr_t ipa, 
void *buf,
     _y;                                                     \
 })
 
+#define guest_handle_for_field(hnd, type, fld)          \
+    ((XEN_GUEST_HANDLE(type)) { &(hnd).p->fld })
+
 #define guest_handle_from_ptr(ptr, type)        \
     ((XEN_GUEST_HANDLE_PARAM(type)) { (type *)ptr })
 #define const_guest_handle_from_ptr(ptr, type)  \
-- 
2.1.4


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel