include/xen/hvm.h

   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 #endif /* XEN_HVM_H__ */