detecting qemu/HVF on Apple M1 silicon

I managed to get FreeBSD running via qemu on Apple M1 silicon, but out
of the box vm detection isn't working causing hz to be set to 1000, and
causing lots of cpu usage to happen.

What are the recommended ways to detect this, so we can get vm_guest set?

A little poking around, shows that there's an ACPI device that is
promising:
        Device (FWCF)
        {
            Name (_HID, "QEMU0002")  // _HID: Hardware ID
            Name (_STA, 0x0B)  // _STA: Status
            Name (_CCA, One)  // _CCA: Cache Coherency Attribute
            Name (_CRS, ResourceTemplate ()  // _CRS: Current Resource Settings
            {
                Memory32Fixed (ReadWrite,
                    0x09020000,         // Address Base
                    0x00000018,         // Address Length
                    )
            })
        }

Here's a complete list of _HID's:
# acpidump -d | grep _HID | sort -u
                Name (_HID, "PNP0C02" /* PNP Motherboard Resources */)  // _HID: Hardware ID
                Name (_HID, "PNP0C0F" /* PCI Interrupt Link Device */)  // _HID: Hardware ID
            Name (_HID, "ACPI0007" /* Processor Device */)  // _HID: Hardware ID
            Name (_HID, "ACPI0013" /* Generic Event Device */)  // _HID: Hardware ID
            Name (_HID, "ARMH0011")  // _HID: Hardware ID
            Name (_HID, "LNRO0005")  // _HID: Hardware ID
            Name (_HID, "PNP0A08" /* PCI Express Bus */)  // _HID: Hardware ID
            Name (_HID, "PNP0C0C" /* Power Button Device */)  // _HID: Hardware ID
            Name (_HID, "QEMU0002")  // _HID: Hardware ID

There's also the usual virtio devices as well.
# pciconf -l
hostb0@pci0:0:0:0:	class=0x060000 rev=0x00 hdr=0x00 vendor=0x1b36 device=0x0008 subvendor=0x1af4 subdevice=0x1100
virtio_pci0@pci0:0:1:0:	class=0x020000 rev=0x00 hdr=0x00 vendor=0x1af4 device=0x1000 subvendor=0x1af4 subdevice=0x0001
virtio_pci1@pci0:0:2:0:	class=0x038000 rev=0x01 hdr=0x00 vendor=0x1af4 device=0x1050 subvendor=0x1af4 subdevice=0x1100
xhci0@pci0:0:3:0:	class=0x0c0330 rev=0x01 hdr=0x00 vendor=0x1b36 device=0x000d subvendor=0x1af4 subdevice=0x1100
none0@pci0:0:4:0:	class=0x040300 rev=0x01 hdr=0x00 vendor=0x8086 device=0x2668 subvendor=0x1af4 subdevice=0x1100
virtio_pci2@pci0:0:5:0:	class=0x010000 rev=0x00 hdr=0x00 vendor=0x1af4 device=0x1001 subvendor=0x1af4 subdevice=0x0002

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  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."