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32 .Nd "run a guest operating system inside a virtual machine"
38 .Op Fl m Ar size Ns Op Ar K|k|M|m|G|g|T|t
39 .Op Fl p Ar vcpu:hostcpu
40 .Op Fl s Ar slot,emulation Ns Op , Ns Ar conf
41 .Op Fl l Ar lpcdev Ns Op , Ns Ar conf
46 is an experimental hypervisor that runs guest operating systems inside a
49 Parameters such as the number of virtual CPUs, amount of guest memory, and
50 I/O connectivity can be specified with command-line parameters.
52 The guest operating system must be loaded with
54 or a similar boot loader before running
58 runs until the guest operating system reboots or an unhandled hypervisor
63 The guest's local APIC is configured in xAPIC mode.
64 The xAPIC mode is the default setting so this option is redundant. It will be
65 deprecated in a future version.
72 Enable a low-level console device supported by
73 .Fx kernels compiled with
74 .Cd "device bvmconsole" .
75 This option will be deprecated in a future version.
77 Number of guest virtual CPUs.
78 The default is 1 and the maximum is 16.
80 Include guest memory in core file.
82 Yield the virtual CPU thread when a HLT instruction is detected.
83 If this option is not specified, virtual CPUs will use 100% of a host CPU.
88 .Cd "device bvmdebug" ,
89 allow a remote kernel kgdb to be relayed to the guest kernel gdb stub
90 via a local IPv4 address and this port.
91 This option will be deprecated in a future version.
92 .It Fl p Ar vcpu:hostcpu
93 Pin guest's virtual CPU
98 Force the guest virtual CPU to exit when a PAUSE instruction is detected.
100 Force virtio PCI device emulations to use MSI interrupts instead of MSI-X
102 .It Fl s Ar slot,emulation Ns Op , Ns Ar conf
103 Configure a virtual PCI slot and function.
106 provides PCI bus emulation and virtual devices that can be attached to
108 There are 32 available slots, with the option of providing up to 8 functions
112 .Ar pcislot[:function]
113 .Ar bus:pcislot:function
117 value is 0 to 31. The optional function value is 0 to 7. The optional
120 If not specified, the function value defaults to 0.
121 If not specified, the bus value defaults to 0.
124 .It Li hostbridge | Li amd_hostbridge
126 Provide a simple host bridge.
127 This is usually configured at slot 0, and is required by most guest
131 emulation is identical but uses a PCI vendor ID of
134 PCI pass-through device.
136 Virtio network interface.
138 Virtio block storage interface.
140 Virtio RNG interface.
142 AHCI controller attached to an ATAPI CD/DVD.
144 AHCI controller attached to a SATA hard-drive.
146 PCI 16550 serial device.
148 LPC PCI-ISA bridge with COM1 and COM2 16550 serial ports. The LPC bridge
149 emulation can only be configured on bus 0.
152 This optional parameter describes the backend for device emulations.
155 is not specified, the device emulation has no backend and can be
156 considered unconnected.
160 .It Ar tapN Ns Op , Ns Ar mac=xx:xx:xx:xx:xx:xx
161 .It Ar vmnetN Ns Op , Ns Ar mac=xx:xx:xx:xx:xx:xx
165 is not specified, the MAC address is derived from a fixed OUI and the
166 remaining bytes from an MD5 hash of the slot and function numbers and
169 The MAC address is an ASCII string in
174 Block storage devices:
176 .It Pa /filename Ns Oo , Ns Li nocache Oc Ns Oo , Ns Li direct Oc Ns Oo , Ns Li ro Oc
177 .It Pa /dev/xxx Ns Oo , Ns Ar nocache Oc Ns Oo , Ns Ar direct Oc Ns Oo , Ns Ar ro Oc
186 Force the file to be opened read-only.
194 options are not available for virtio block devices.
200 Connect the serial port to the standard input and output of
203 Use the host TTY device for serial port I/O.
206 Pass-through devices:
208 .It Ns Ar slot Ns / Ns Ar bus Ns / Ns Ar function
209 Connect to a PCI device on the host at the selector described by
217 The host device must have been reserved at boot-time using the
219 loader variable as described in
222 .It Fl l Ar lpcdev Ns Op , Ns Ar conf
223 Allow devices behind the LPC PCI-ISA bridge to be configured.
224 The only supported devices are the TTY-class devices,
228 .It Fl m Ar size Ns Op Ar K|k|M|m|G|g|T|t
229 Guest physical memory size in bytes.
230 This must be the same size that was given to
233 The size argument may be suffixed with one of K, M, G or T (either upper
234 or lower case) to indicate a multiple of kilobytes, megabytes, gigabytes,
236 If no suffix is given, the value is assumed to be in megabytes.
240 to exit when a guest issues an access to an I/O port that is not emulated.
241 This is intended for debug purposes.
243 Set the universally unique identifier
245 in the guest's System Management BIOS System Information structure.
246 By default a UUID is generated from the host's hostname and
249 Ignore accesses to unimplemented Model Specific Registers (MSRs). This is intended for debug purposes.
251 The guest's local APIC is configured in x2APIC mode.
253 Disable MPtable generation.
255 Print help message and exit.
257 Alphanumeric name of the guest.
258 This should be the same as that created by
262 The guest operating system must have been loaded with
264 or a similar boot loader before
268 To run a virtual machine with 1GB of memory, two virtual CPUs, a virtio
269 block device backed by the
271 filesystem image, and a serial port for the console:
272 .Bd -literal -offset indent
273 bhyve -c 2 -s 0,hostbridge -s 1,lpc -s 2,virtio-blk,/my/image \\
274 -l com1,stdio -A -H -P -m 1G vm1
277 Run a 24GB single-CPU virtual machine with three network ports, one of which
278 has a MAC address specified:
279 .Bd -literal -offset indent
280 bhyve -s 0,hostbridge -s 1,lpc -s 2:0,virtio-net,tap0 \\
281 -s 2:1,virtio-net,tap1 \\
282 -s 2:2,virtio-net,tap2,mac=00:be:fa:76:45:00 \\
283 -s 3,virtio-blk,/my/image -l com1,stdio \\
284 -A -H -P -m 24G bigvm
287 Run an 8GB quad-CPU virtual machine with 8 AHCI SATA disks, an AHCI ATAPI
288 CD-ROM, a single virtio network port, an AMD hostbridge, and the console
292 .Bd -literal -offset indent
294 -s 0,amd_hostbridge -s 1,lpc \\
295 -s 1:0,ahci-hd,/images/disk.1 \\
296 -s 1:1,ahci-hd,/images/disk.2 \\
297 -s 1:2,ahci-hd,/images/disk.3 \\
298 -s 1:3,ahci-hd,/images/disk.4 \\
299 -s 1:4,ahci-hd,/images/disk.5 \\
300 -s 1:5,ahci-hd,/images/disk.6 \\
301 -s 1:6,ahci-hd,/images/disk.7 \\
302 -s 1:7,ahci-hd,/images/disk.8 \\
303 -s 2,ahci-cd,/images.install.iso \\
304 -s 3,virtio-net,tap0 \\
305 -l com1,/dev/nmdm0A \\
320 .An Neel Natu Aq Mt neel@freebsd.org
321 .An Peter Grehan Aq Mt grehan@freebsd.org