A XEN_GUEST_HANDLE_PARAM is used to represent a guest pointer passed as
an hypercall register. It will always be the size of a native register.
This is only used in Xen for type-safety, the guest will directly pass a
pointer in the hypercall parameter.
Note that for ARM we only hide XEN_GUEST_HANDLE_PARAM. The type
__guest_handle_param_* is still exposed because it would result to
duplicating the macro to create the type. I find this solution more
difficult to read.
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 | 4 ++++
xen/include/public/arch-x86/xen.h | 4 ++++
2 files changed, 8 insertions(+)
diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h
index 477254f..b278bc0 100644
--- a/xen/include/public/arch-arm.h
+++ b/xen/include/public/arch-arm.h
@@ -188,7 +188,11 @@
#define DEFINE_XEN_GUEST_HANDLE(name) __DEFINE_XEN_GUEST_HANDLE(name, name)
#define __XEN_GUEST_HANDLE(name) __guest_handle_ ## name
#define XEN_GUEST_HANDLE(name) __XEN_GUEST_HANDLE(name)
+
+#ifdef __XEN__ /* Internal only, should never be exposed to the guest */
#define XEN_GUEST_HANDLE_PARAM(name) __guest_handle_param_ ## name
+#endif
+
#define set_xen_guest_handle_raw(hnd, val) \
do { \
typeof(&(hnd)) _sxghr_tmp = &(hnd); \
diff --git a/xen/include/public/arch-x86/xen.h
b/xen/include/public/arch-x86/xen.h
index 5187560..8036b3c 100644
--- a/xen/include/public/arch-x86/xen.h
+++ b/xen/include/public/arch-x86/xen.h
@@ -52,7 +52,11 @@
#define DEFINE_XEN_GUEST_HANDLE(name) __DEFINE_XEN_GUEST_HANDLE(name, name)
#define __XEN_GUEST_HANDLE(name) __guest_handle_ ## name
#define XEN_GUEST_HANDLE(name) __XEN_GUEST_HANDLE(name)
+
+#ifdef __XEN__ /* Internal only, should never be exposed to the guest */
#define XEN_GUEST_HANDLE_PARAM(name) XEN_GUEST_HANDLE(name)
+#endif
+
#define set_xen_guest_handle_raw(hnd, val) do { (hnd).p = val; } while (0)
#define set_xen_guest_handle(hnd, val) set_xen_guest_handle_raw(hnd, val)
--
2.1.4
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