LXR linux/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
   9static 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}
  39static 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__ */
  62