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 #endif /* XEN_HVM_H__ */ 64