提交 1246ae0b 编写于 作者: J Jeremy Fitzhardinge 提交者: Jeremy Fitzhardinge

xen: add variable hypercall caller

Allow non-constant hypercall to be called, for privcmd.

[ Impact: make arbitrary hypercalls; needed for privcmd ]
Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
上级 eba3ff8b
......@@ -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)
{
......
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