kernel/include/xen/hvm.h

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