linux/include/xen/hvm.h
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   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
   8static 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}
  38static 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                printk(KERN_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__ */
  61
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