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27 .Dd September 17, 2014
32 .Nd "run a guest operating system inside a virtual machine"
38 .Op Fl l Ar lpcdev Ns Op , Ns Ar conf
39 .Op Fl m Ar size Ns Op Ar K|k|M|m|G|g|T|t
40 .Op Fl p Ar vcpu:hostcpu
41 .Op Fl s Ar slot,emulation Ns Op , Ns Ar conf
46 is a 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
75 .Cd "device bvmconsole" .
76 This option will be deprecated in a future version.
78 Number of guest virtual CPUs.
79 The default is 1 and the maximum is 16.
81 Include guest memory in core file.
85 to exit when a guest issues an access to an I/O port that is not emulated.
86 This is intended for debug purposes.
91 .Cd "device bvmdebug" ,
92 allow a remote kernel kgdb to be relayed to the guest kernel gdb stub
93 via a local IPv4 address and this port.
94 This option will be deprecated in a future version.
96 Print help message and exit.
98 Yield the virtual CPU thread when a HLT instruction is detected.
99 If this option is not specified, virtual CPUs will use 100% of a host CPU.
100 .It Fl l Ar lpcdev Ns Op , Ns Ar conf
101 Allow devices behind the LPC PCI-ISA bridge to be configured.
102 The only supported devices are the TTY-class devices,
106 .It Fl m Ar size Ns Op Ar K|k|M|m|G|g|T|t
107 Guest physical memory size in bytes.
108 This must be the same size that was given to
111 The size argument may be suffixed with one of K, M, G or T (either upper
112 or lower case) to indicate a multiple of kilobytes, megabytes, gigabytes,
114 If no suffix is given, the value is assumed to be in megabytes.
115 .It Fl p Ar vcpu:hostcpu
116 Pin guest's virtual CPU
121 Force the guest virtual CPU to exit when a PAUSE instruction is detected.
122 .It Fl s Ar slot,emulation Ns Op , Ns Ar conf
123 Configure a virtual PCI slot and function.
126 provides PCI bus emulation and virtual devices that can be attached to
128 There are 32 available slots, with the option of providing up to 8 functions
132 .Ar pcislot[:function]
133 .Ar bus:pcislot:function
137 value is 0 to 31. The optional function value is 0 to 7. The optional
140 If not specified, the function value defaults to 0.
141 If not specified, the bus value defaults to 0.
144 .It Li hostbridge | Li amd_hostbridge
146 Provide a simple host bridge.
147 This is usually configured at slot 0, and is required by most guest
151 emulation is identical but uses a PCI vendor ID of
154 PCI pass-through device.
156 Virtio network interface.
158 Virtio block storage interface.
160 Virtio RNG interface.
162 AHCI controller attached to an ATAPI CD/DVD.
164 AHCI controller attached to a SATA hard-drive.
166 PCI 16550 serial device.
168 LPC PCI-ISA bridge with COM1 and COM2 16550 serial ports. The LPC bridge
169 emulation can only be configured on bus 0.
172 This optional parameter describes the backend for device emulations.
175 is not specified, the device emulation has no backend and can be
176 considered unconnected.
180 .It Ar tapN Ns Op , Ns Ar mac=xx:xx:xx:xx:xx:xx
181 .It Ar vmnetN Ns Op , Ns Ar mac=xx:xx:xx:xx:xx:xx
185 is not specified, the MAC address is derived from a fixed OUI and the
186 remaining bytes from an MD5 hash of the slot and function numbers and
189 The MAC address is an ASCII string in
194 Block storage devices:
196 .It Pa /filename Ns Oo , Ns Ar block-device-options Oc
197 .It Pa /dev/xxx Ns Oo , Ns Ar block-device-options Oc
201 .Ar block-device-options
211 Force the file to be opened read-only.
212 .It Li sectorsize= Ns Ar logical Ns Oo / Ns Ar physical Oc
213 Specify the logical and physical sector sizes of the emulated disk.
214 The physical sector size is optional and is equal to the logical sector size
215 if not explicitly specified.
221 Connect the serial port to the standard input and output of
224 Use the host TTY device for serial port I/O.
227 Pass-through devices:
229 .It Ns Ar slot Ns / Ns Ar bus Ns / Ns Ar function
230 Connect to a PCI device on the host at the selector described by
238 The host device must have been reserved at boot-time using the
240 loader variable as described in
246 Set the universally unique identifier
248 in the guest's System Management BIOS System Information structure.
249 By default a UUID is generated from the host's hostname and
252 Ignore accesses to unimplemented Model Specific Registers (MSRs). This is intended for debug purposes.
254 Force virtio PCI device emulations to use MSI interrupts instead of MSI-X
257 The guest's local APIC is configured in x2APIC mode.
259 Disable MPtable generation.
261 Alphanumeric name of the guest.
262 This should be the same as that created by
266 The guest operating system must have been loaded with
268 or a similar boot loader before
272 To run a virtual machine with 1GB of memory, two virtual CPUs, a virtio
273 block device backed by the
275 filesystem image, and a serial port for the console:
276 .Bd -literal -offset indent
277 bhyve -c 2 -s 0,hostbridge -s 1,lpc -s 2,virtio-blk,/my/image \\
278 -l com1,stdio -A -H -P -m 1G vm1
281 Run a 24GB single-CPU virtual machine with three network ports, one of which
282 has a MAC address specified:
283 .Bd -literal -offset indent
284 bhyve -s 0,hostbridge -s 1,lpc -s 2:0,virtio-net,tap0 \\
285 -s 2:1,virtio-net,tap1 \\
286 -s 2:2,virtio-net,tap2,mac=00:be:fa:76:45:00 \\
287 -s 3,virtio-blk,/my/image -l com1,stdio \\
288 -A -H -P -m 24G bigvm
291 Run an 8GB quad-CPU virtual machine with 8 AHCI SATA disks, an AHCI ATAPI
292 CD-ROM, a single virtio network port, an AMD hostbridge, and the console
296 .Bd -literal -offset indent
298 -s 0,amd_hostbridge -s 1,lpc \\
299 -s 1:0,ahci-hd,/images/disk.1 \\
300 -s 1:1,ahci-hd,/images/disk.2 \\
301 -s 1:2,ahci-hd,/images/disk.3 \\
302 -s 1:3,ahci-hd,/images/disk.4 \\
303 -s 1:4,ahci-hd,/images/disk.5 \\
304 -s 1:5,ahci-hd,/images/disk.6 \\
305 -s 1:6,ahci-hd,/images/disk.7 \\
306 -s 1:7,ahci-hd,/images/disk.8 \\
307 -s 2,ahci-cd,/images.install.iso \\
308 -s 3,virtio-net,tap0 \\
309 -l com1,/dev/nmdm0A \\
324 .An Neel Natu Aq neel@freebsd.org
325 .An Peter Grehan Aq grehan@freebsd.org