__guest_handle_param is used to represent a guest pointer stored pass as
an hypercall parameters. They are the same size as the native register
for the architecture. It will be 32-bit on ARM32 and 64-bit on ARM64.
As the __guest_handle_param will always be the size of a native
pointer, there is no need to have a union with an unsigned long.
Note that unsigned long may be not equivalent to the size of a pointer
on ARM64. It depends whether the software is build using the LP64 or
LLP64 data model. The size of an unsigned long in the latter will be
32-bit.
Signed-off-by: Julien Grall <julien.gr...@citrix.com>
---
Cc: Ian Jackson <ian.jack...@eu.citrix.com>
Cc: Jan Beulich <jbeul...@suse.com>
Cc: Keir Fraser <k...@xen.org>
Cc: Tim Deegan <t...@xen.org>
---
xen/include/public/arch-arm.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h
index 35839db..477254f 100644
--- a/xen/include/public/arch-arm.h
+++ b/xen/include/public/arch-arm.h
@@ -170,7 +170,7 @@
#ifndef __ASSEMBLY__
#define ___DEFINE_XEN_GUEST_HANDLE(name, type) \
- typedef union { type *p; unsigned long q; } \
+ typedef struct { type *p; } \
__guest_handle_param_ ## name; \
typedef union { type *p; uint64_aligned_t q; } \
__guest_handle_ ## name;
--
2.1.4
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