1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Simple wrappers around HVM functions */
3 #ifndef XEN_HVM_H__
4 #define XEN_HVM_H__
5
6 #include <xen/interface/hvm/params.h>
7 #include <asm/xen/hypercall.h>
8
9 static const char *param_name(int op)
10 {
11 #define PARAM(x) [HVM_PARAM_##x] = #x
12 static const char *const names[] = {
13 PARAM(CALLBACK_IRQ),
14 PARAM(STORE_PFN),
15 PARAM(STORE_EVTCHN),
16 PARAM(PAE_ENABLED),
17 PARAM(IOREQ_PFN),
18 PARAM(BUFIOREQ_PFN),
19 PARAM(TIMER_MODE),
20 PARAM(HPET_ENABLED),
21 PARAM(IDENT_PT),
22 PARAM(DM_DOMAIN),
23 PARAM(ACPI_S_STATE),
24 PARAM(VM86_TSS),
25 PARAM(VPT_ALIGN),
26 PARAM(CONSOLE_PFN),
27 PARAM(CONSOLE_EVTCHN),
28 };
29 #undef PARAM
30
31 if (op >= ARRAY_SIZE(names))
32 return "unknown";
33
34 if (!names[op])
35 return "reserved";
36
37 return names[op];
38 }
39 static inline int hvm_get_parameter(int idx, uint64_t *value)
40 {
41 struct xen_hvm_param xhv;
42 int r;
43
44 xhv.domid = DOMID_SELF;
45 xhv.index = idx;
46 r = HYPERVISOR_hvm_op(HVMOP_get_param, &xhv);
47 if (r < 0) {
48 pr_err("Cannot get hvm parameter %s (%d): %d!\n",
49 param_name(idx), idx, r);
50 return r;
51 }
52 *value = xhv.value;
53 return r;
54 }
55
56 #define HVM_CALLBACK_VIA_TYPE_VECTOR 0x2
57 #define HVM_CALLBACK_VIA_TYPE_SHIFT 56
58 #define HVM_CALLBACK_VECTOR(x) (((uint64_t)HVM_CALLBACK_VIA_TYPE_VECTOR)<<\
59 HVM_CALLBACK_VIA_TYPE_SHIFT | (x))
60
61 void xen_setup_callback_vector(void);
62
63 int xen_set_upcall_vector(unsigned int cpu);
64
65 #endif /* XEN_HVM_H__ */
66
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