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authorJeremy Fitzhardinge <jeremy@goop.org>2009-02-09 12:05:49 -0800
committerJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2010-10-20 16:22:27 -0700
commit1246ae0bb992f106a245eea2b8dd901ced868e7a (patch)
tree93d34437d2e34a4d7f6933c286e3b58a3e5c86b0
parenteba3ff8b99863bcc9e66b8d528e4750229e29693 (diff)
xen: add variable hypercall caller
Allow non-constant hypercall to be called, for privcmd. [ Impact: make arbitrary hypercalls; needed for privcmd ] Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
-rw-r--r--arch/x86/include/asm/xen/hypercall.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/x86/include/asm/xen/hypercall.h b/arch/x86/include/asm/xen/hypercall.h
index 7fda040a76c..a3c28ae4025 100644
--- a/arch/x86/include/asm/xen/hypercall.h
+++ b/arch/x86/include/asm/xen/hypercall.h
@@ -200,6 +200,23 @@ extern struct { char _entry[32]; } hypercall_page[];
(type)__res; \
})
+static inline long
+privcmd_call(unsigned call,
+ unsigned long a1, unsigned long a2,
+ unsigned long a3, unsigned long a4,
+ unsigned long a5)
+{
+ __HYPERCALL_DECLS;
+ __HYPERCALL_5ARG(a1, a2, a3, a4, a5);
+
+ asm volatile("call *%[call]"
+ : __HYPERCALL_5PARAM
+ : [call] "a" (&hypercall_page[call])
+ : __HYPERCALL_CLOBBER5);
+
+ return (long)__res;
+}
+
static inline int
HYPERVISOR_set_trap_table(struct trap_info *table)
{