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, arg: &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 | |