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32 .Nd "run a guest operating system inside a virtual machine"
38 .Op Fl p Ar vcpu:hostcpu
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.
62 The xAPIC mode is the default setting so this option is redundant. It will be
63 deprecated in a future version.
70 Number of guest virtual CPUs.
71 The default is 1 and the maximum is 16.
73 Include guest memory in core file.
75 Yield the virtual CPU thread when a HLT instruction is detected.
76 If this option is not specified, virtual CPUs will use 100% of a host CPU.
79 .Fx Ns /amd64 kernels compiled with
80 .Cd "option bvmdebug" ,
81 allow a remote kernel kgdb to be relayed to the guest kernel gdb stub
82 via a local IPv4 address and this port.
83 This option will be deprecated in a future version.
84 .It Fl p Ar vcpu:hostcpu
85 Pin guest's virtual CPU
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]
105 .Ar bus:pcislot:function
109 value is 0 to 31. The optional function value is 0 to 7. The optional
112 If not specified, the function value defaults to 0.
113 If not specified, the bus value defaults to 0.
116 .It Li hostbridge | Li amd_hostbridge
118 Provide a simple host bridge.
119 This is usually configured at slot 0, and is required by most guest
123 emulation is identical but uses a PCI vendor ID of
126 PCI pass-through device.
128 Virtio network interface.
130 Virtio block storage interface.
132 Virtio RNG interface.
134 AHCI controller attached to an ATAPI CD/DVD.
136 AHCI controller attached to a SATA hard-drive.
138 PCI 16550 serial device.
140 LPC PCI-ISA bridge with COM1 and COM2 16550 serial ports. The LPC bridge
141 emulation can only be configured on bus 0.
144 This optional parameter describes the backend for device emulations.
147 is not specified, the device emulation has no backend and can be
148 considered unconnected.
152 .It Ar tapN Ns Op , Ns Ar mac=xx:xx:xx:xx:xx:xx
153 .It Ar vmnetN Ns Op , Ns Ar mac=xx:xx:xx:xx:xx:xx
157 is not specified, the MAC address is derived from a fixed OUI and the
158 remaining bytes from an MD5 hash of the slot and function numbers and
161 The MAC address is an ASCII string in
166 Block storage devices:
168 .It Pa /filename Ns Oo , Ns Li nocache Oc Ns Oo , Ns Li direct Oc Ns Oo , Ns Li ro Oc
169 .It Pa /dev/xxx Ns Oo , Ns Ar nocache Oc Ns Oo , Ns Ar direct Oc Ns Oo , Ns Ar ro Oc
178 Force the file to be opened read-only.
186 options are not available for virtio block devices.
192 Connect the serial port to the standard input and output of
195 Use the host TTY device for serial port I/O.
198 Pass-through devices:
200 .It Ns Ar slot Ns / Ns Ar bus Ns / Ns Ar function
201 Connect to a PCI device on the host at the selector described by
209 The host device must have been reserved at boot-time using the
211 loader variable as described in
214 .It Fl l Ar lpcdev Ns Op , Ns Ar conf
215 Allow devices behind the LPC PCI-ISA bridge to be configured.
216 The only supported devices are the TTY-class devices,
220 .It Fl m Ar size Ns Op Ar K|k|M|m|G|g|T|t
221 Guest physical memory size in bytes.
222 This must be the same size that was given to
225 The size argument may be suffixed with one of K, M, G or T (either upper
226 or lower case) to indicate a multiple of kilobytes, megabytes, gigabytes,
228 If no suffix is given, the value is assumed to be in megabytes.
232 to exit when a guest issues an access to an I/O port that is not emulated.
233 This is intended for debug purposes.
235 Ignore accesses to unimplemented Model Specific Registers (MSRs). This is intended for debug purposes.
237 The guest's local APIC is configured in x2APIC mode.
239 Disable MPtable generation.
241 Print help message and exit.
243 Alphanumeric name of the guest.
244 This should be the same as that created by
248 The guest operating system must have been loaded with
250 or a similar boot loader before
254 To run a virtual machine with 1GB of memory, two virtual CPUs, a virtio
255 block device backed by the
257 filesystem image, and a serial port for the console:
258 .Bd -literal -offset indent
259 bhyve -c 2 -s 0,hostbridge -s 1,lpc -s 2,virtio-blk,/my/image \\
260 -l com1,stdio -A -H -P -m 1G vm1
263 Run a 24GB single-CPU virtual machine with three network ports, one of which
264 has a MAC address specified:
265 .Bd -literal -offset indent
266 bhyve -s 0,hostbridge -s 1,lpc -s 2:0,virtio-net,tap0 \\
267 -s 2:1,virtio-net,tap1 \\
268 -s 2:2,virtio-net,tap2,mac=00:be:fa:76:45:00 \\
269 -s 3,virtio-blk,/my/image -l com1,stdio \\
270 -A -H -P -m 24G bigvm
273 Run an 8GB quad-CPU virtual machine with 8 AHCI SATA disks, an AHCI ATAPI
274 CD-ROM, a single virtio network port, an AMD hostbridge, and the console
278 .Bd -literal -offset indent
280 -s 0,amd_hostbridge -s 1,lpc \\
281 -s 1:0,ahci-hd,/images/disk.1 \\
282 -s 1:1,ahci-hd,/images/disk.2 \\
283 -s 1:2,ahci-hd,/images/disk.3 \\
284 -s 1:3,ahci-hd,/images/disk.4 \\
285 -s 1:4,ahci-hd,/images/disk.5 \\
286 -s 1:5,ahci-hd,/images/disk.6 \\
287 -s 1:6,ahci-hd,/images/disk.7 \\
288 -s 1:7,ahci-hd,/images/disk.8 \\
289 -s 2,ahci-cd,/images.install.iso \\
290 -s 3,virtio-net,tap0 \\
291 -l com1,/dev/nmdm0A \\
306 .An Neel Natu Aq neel@freebsd.org
307 .An Peter Grehan Aq grehan@freebsd.org