root/include/xen/hvm.h

DEFINITIONS

1. param_name
2. hvm_get_parameter

/* Simple wrappers around HVM functions */
#ifndef XEN_HVM_H__
#define XEN_HVM_H__

#include <xen/interface/hvm/params.h>
#include <asm/xen/hypercall.h>

static const char *param_name(int op)
{
#define PARAM(x) [HVM_PARAM_##x] = #x
        static const char *const names[] = {
                PARAM(CALLBACK_IRQ),
                PARAM(STORE_PFN),
                PARAM(STORE_EVTCHN),
                PARAM(PAE_ENABLED),
                PARAM(IOREQ_PFN),
                PARAM(BUFIOREQ_PFN),
                PARAM(TIMER_MODE),
                PARAM(HPET_ENABLED),
                PARAM(IDENT_PT),
                PARAM(DM_DOMAIN),
                PARAM(ACPI_S_STATE),
                PARAM(VM86_TSS),
                PARAM(VPT_ALIGN),
                PARAM(CONSOLE_PFN),
                PARAM(CONSOLE_EVTCHN),
        };
#undef PARAM

        if (op >= ARRAY_SIZE(names))
                return "unknown";

        if (!names[op])
                return "reserved";

        return names[op];
}
static inline int hvm_get_parameter(int idx, uint64_t *value)
{
        struct xen_hvm_param xhv;
        int r;

        xhv.domid = DOMID_SELF;
        xhv.index = idx;
        r = HYPERVISOR_hvm_op(HVMOP_get_param, &xhv);
        if (r < 0) {
                pr_err("Cannot get hvm parameter %s (%d): %d!\n",
                       param_name(idx), idx, r);
                return r;
        }
        *value = xhv.value;
        return r;
}

#define HVM_CALLBACK_VIA_TYPE_VECTOR 0x2
#define HVM_CALLBACK_VIA_TYPE_SHIFT 56
#define HVM_CALLBACK_VECTOR(x) (((uint64_t)HVM_CALLBACK_VIA_TYPE_VECTOR)<<\
                HVM_CALLBACK_VIA_TYPE_SHIFT | (x))

#endif /* XEN_HVM_H__ */