1/* Simple wrappers around HVM functions */
2#ifndef XEN_HVM_H__
3#define XEN_HVM_H__
4
5#include <xen/interface/hvm/params.h>
6#include <asm/xen/hypercall.h>
7
8static const char *param_name(int op)
9{
10#define PARAM(x) [HVM_PARAM_##x] = #x
11	static const char *const names[] = {
12		PARAM(CALLBACK_IRQ),
13		PARAM(STORE_PFN),
14		PARAM(STORE_EVTCHN),
15		PARAM(PAE_ENABLED),
16		PARAM(IOREQ_PFN),
17		PARAM(BUFIOREQ_PFN),
18		PARAM(TIMER_MODE),
19		PARAM(HPET_ENABLED),
20		PARAM(IDENT_PT),
21		PARAM(DM_DOMAIN),
22		PARAM(ACPI_S_STATE),
23		PARAM(VM86_TSS),
24		PARAM(VPT_ALIGN),
25		PARAM(CONSOLE_PFN),
26		PARAM(CONSOLE_EVTCHN),
27	};
28#undef PARAM
29
30	if (op >= ARRAY_SIZE(names))
31		return "unknown";
32
33	if (!names[op])
34		return "reserved";
35
36	return names[op];
37}
38static inline int hvm_get_parameter(int idx, uint64_t *value)
39{
40	struct xen_hvm_param xhv;
41	int r;
42
43	xhv.domid = DOMID_SELF;
44	xhv.index = idx;
45	r = HYPERVISOR_hvm_op(HVMOP_get_param, &xhv);
46	if (r < 0) {
47		pr_err("Cannot get hvm parameter %s (%d): %d!\n",
48		       param_name(idx), idx, r);
49		return r;
50	}
51	*value = xhv.value;
52	return r;
53}
54
55#define HVM_CALLBACK_VIA_TYPE_VECTOR 0x2
56#define HVM_CALLBACK_VIA_TYPE_SHIFT 56
57#define HVM_CALLBACK_VECTOR(x) (((uint64_t)HVM_CALLBACK_VIA_TYPE_VECTOR)<<\
58		HVM_CALLBACK_VIA_TYPE_SHIFT | (x))
59
60#endif /* XEN_HVM_H__ */
61