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Commit 1246ae0b authored by Jeremy Fitzhardinge's avatar Jeremy Fitzhardinge Committed by Jeremy Fitzhardinge
Browse files

xen: add variable hypercall caller 



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

[ Impact: make arbitrary hypercalls; needed for privcmd ]

Signed-off-by: default avatarJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
parent eba3ff8b

arch/x86/include/asm/xen/hypercall.h

+17 −0
Original line number Diff line number Diff line
@@ -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)

{