hvm.h

Go to the documentation of this file.

/* 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) {
        printk(KERN_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__ */