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32 .Nd "run a guest operating system inside a virtual machine"
39 .Op Fl s Ar slot,emulation Ns Op , Ns Ar conf
40 .Op Fl l Ar lpcdev Ns Op , Ns Ar conf
44 is an experimental hypervisor that runs guest operating systems inside a
47 Parameters such as the number of virtual CPUs, amount of guest memory, and
48 I/O connectivity can be specified with command-line parameters.
50 The guest operating system must be loaded with
52 or a similar boot loader before running
56 runs until the guest operating system reboots or an unhandled hypervisor
61 The guest's local APIC is configured in xAPIC mode.
63 The xAPIC mode is the default setting so this option is redundant. It will be
64 deprecated in a future version.
71 Number of guest virtual CPUs.
72 The default is 1 and the maximum is 16.
74 Yield the virtual CPU thread when a HLT instruction is detected.
75 If this option is not specified, virtual CPUs will use 100% of a host CPU.
78 .Fx Ns /amd64 kernels compiled with
79 .Cd "option bvmdebug" ,
80 allow a remote kernel kgdb to be relayed to the guest kernel gdb stub
81 via a local IPv4 address and this port.
82 This option will be deprecated in a future version.
84 Force guest virtual CPUs to be pinned to host CPUs.
90 Force the guest virtual CPU to exit when a PAUSE instruction is detected.
92 Force virtio PCI device emulations to use MSI interrupts instead of MSI-X
94 .It Fl s Ar slot,emulation Ns Op , Ns Ar conf
95 Configure a virtual PCI slot and function.
98 provides PCI bus emulation and virtual devices that can be attached to
100 There are 32 available slots, with the option of providing up to 8 functions
104 .Ar pcislot[:function]
106 .Ar bus:pcislot:function
110 value is 0 to 31. The optional function value is 0 to 7. The optional
113 If not specified, the function value defaults to 0.
114 If not specified, the bus value defaults to 0.
117 .It Li hostbridge | Li amd_hostbridge
119 Provide a simple host bridge.
120 This is usually configured at slot 0, and is required by most guest
124 emulation is identical but uses a PCI vendor ID of
127 PCI pass-through device.
129 Virtio network interface.
131 Virtio block storage interface.
133 AHCI controller attached to an ATAPI CD/DVD.
135 AHCI controller attached to a SATA hard-drive.
137 PCI 16550 serial device.
139 LPC PCI-ISA bridge with COM1 and COM2 16550 serial ports. The LPC bridge
140 emulation can only be configured on bus 0.
143 This optional parameter describes the backend for device emulations.
146 is not specified, the device emulation has no backend and can be
147 considered unconnected.
151 .It Ar tapN Ns Op , Ns Ar mac=xx:xx:xx:xx:xx:xx
152 .It Ar vmnetN Ns Op , Ns Ar mac=xx:xx:xx:xx:xx:xx
156 is not specified, the MAC address is derived from a fixed OUI and the
157 remaining bytes from an MD5 hash of the slot and function numbers and
160 The MAC address is an ASCII string in
165 Block storage devices:
167 .It Pa /filename Ns Oo , Ns Li nocache Oc Ns Oo , Ns Li direct Oc Ns Oo , Ns Li ro Oc
168 .It Pa /dev/xxx Ns Oo , Ns Ar nocache Oc Ns Oo , Ns Ar direct Oc Ns Oo , Ns Ar ro Oc
177 Force the file to be opened read-only.
185 options are not available for virtio block devices.
191 Connect the serial port to the standard input and output of
194 Use the host TTY device for serial port I/O.
197 Pass-through devices:
199 .It Ns Ar slot Ns / Ns Ar bus Ns / Ns Ar function
200 Connect to a PCI device on the host at the selector described by
208 The host device must have been reserved at boot-time using the
210 loader variable as described in
213 .It Fl l Ar lpcdev Ns Op , Ns Ar conf
214 Allow devices behind the LPC PCI-ISA bridge to be configured.
215 The only supported devices are the TTY-class devices,
219 .It Fl m Ar size Ns Op Ar K|k|M|m|G|g|T|t
220 Guest physical memory size in bytes.
221 This must be the same size that was given to
224 The size argument may be suffixed with one of K, M, G or T (either upper
225 or lower case) to indicate a multiple of kilobytes, megabytes, gigabytes,
227 If no suffix is given, the value is assumed to be in megabytes.
231 to exit when a guest issues an access to an I/O port that is not emulated.
232 This is intended for debug purposes.
234 Ignore accesses to unimplemented Model Specific Registers (MSRs). This is intended for debug purposes.
236 The guest's local APIC is configured in x2APIC mode.
238 Print help message and exit.
240 Alphanumeric name of the guest.
241 This should be the same as that created by
245 The guest operating system must have been loaded with
247 or a similar boot loader before
251 To run a virtual machine with 1GB of memory, two virtual CPUs, a virtio
252 block device backed by the
254 filesystem image, and a serial port for the console:
255 .Bd -literal -offset indent
256 bhyve -c 2 -s 0,hostbridge -s 1,lpc -s 2,virtio-blk,/my/image \\
257 -l com1,stdio -A -H -P -m 1G vm1
260 Run a 24GB single-CPU virtual machine with three network ports, one of which
261 has a MAC address specified:
262 .Bd -literal -offset indent
263 bhyve -s 0,hostbridge -s 1,lpc -s 2:0,virtio-net,tap0 \\
264 -s 2:1,virtio-net,tap1 \\
265 -s 2:2,virtio-net,tap2,mac=00:be:fa:76:45:00 \\
266 -s 3,virtio-blk,/my/image -l com1,stdio \\
267 -A -H -P -m 24G bigvm
270 Run an 8GB quad-CPU virtual machine with 8 AHCI SATA disks, an AHCI ATAPI
271 CD-ROM, a single virtio network port, an AMD hostbridge, and the console
275 .Bd -literal -offset indent
277 -s 0,amd_hostbridge -s 1,lpc \\
278 -s 1:0,ahci-hd,/images/disk.1 \\
279 -s 1:1,ahci-hd,/images/disk.2 \\
280 -s 1:2,ahci-hd,/images/disk.3 \\
281 -s 1:3,ahci-hd,/images/disk.4 \\
282 -s 1:4,ahci-hd,/images/disk.5 \\
283 -s 1:5,ahci-hd,/images/disk.6 \\
284 -s 1:6,ahci-hd,/images/disk.7 \\
285 -s 1:7,ahci-hd,/images/disk.8 \\
286 -s 2,ahci-cd,/images.install.iso \\
287 -s 3,virtio-net,tap0 \\
288 -l com1,/dev/nmdm0A \\
303 .An Neel Natu Aq neel@freebsd.org
304 .An Peter Grehan Aq grehan@freebsd.org