xref: /openbmc/linux/include/xen/hvm.h (revision b1c3497e)
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 
param_name(int op)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 }
hvm_get_parameter(int idx,uint64_t * value)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