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| author |   Jeremy Fitzhardinge <jeremy@goop.org> | 2009-02-09 12:05:49 -0800 |
|---|---|---|
| committer |   Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-10-20 16:22:27 -0700 |
| commit | 1246ae0bb992f106a245eea2b8dd901ced868e7a (patch) | |
| tree | 93d34437d2e34a4d7f6933c286e3b58a3e5c86b0 | |
| parent | xen: add xen_set_domain_pte() (diff) | |
| download | linux-dev-1246ae0bb992f106a245eea2b8dd901ced868e7a.tar.xz linux-dev-1246ae0bb992f106a245eea2b8dd901ced868e7a.zip | |
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.h | 17 |
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 7fda040a76cd..a3c28ae4025b 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) { |