xen64: implement 64-bit update_descriptor
64-bit hypercall interface can pass a maddr in one argument rather
than splitting it.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/asm-x86/xen/hypercall.h b/include/asm-x86/xen/hypercall.h
index d9e4cf7..91cb7fd 100644
--- a/include/asm-x86/xen/hypercall.h
+++ b/include/asm-x86/xen/hypercall.h
@@ -466,10 +466,15 @@
struct desc_struct desc)
{
mcl->op = __HYPERVISOR_update_descriptor;
- mcl->args[0] = maddr;
- mcl->args[1] = maddr >> 32;
- mcl->args[2] = desc.a;
- mcl->args[3] = desc.b;
+ if (sizeof(maddr) == sizeof(long)) {
+ mcl->args[0] = maddr;
+ mcl->args[1] = *(unsigned long *)&desc;
+ } else {
+ mcl->args[0] = maddr;
+ mcl->args[1] = maddr >> 32;
+ mcl->args[2] = desc.a;
+ mcl->args[3] = desc.b;
+ }
}
static inline void