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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 Yield the virtual CPU thread when a HLT instruction is detected.
74 If this option is not specified, virtual CPUs will use 100% of a host CPU.
77 .Fx Ns /amd64 kernels compiled with
78 .Cd "option bvmdebug" ,
79 allow a remote kernel kgdb to be relayed to the guest kernel gdb stub
80 via a local IPv4 address and this port.
81 This option will be deprecated in a future version.
82 .It Fl p Ar vcpu:hostcpu
83 Pin guest's virtual CPU
88 Force the guest virtual CPU to exit when a PAUSE instruction is detected.
90 Force virtio PCI device emulations to use MSI interrupts instead of MSI-X
92 .It Fl s Ar slot,emulation Ns Op , Ns Ar conf
93 Configure a virtual PCI slot and function.
96 provides PCI bus emulation and virtual devices that can be attached to
98 There are 32 available slots, with the option of providing up to 8 functions
102 .Ar pcislot[:function]
103 .Ar bus:pcislot:function
107 value is 0 to 31. The optional function value is 0 to 7. The optional
110 If not specified, the function value defaults to 0.
111 If not specified, the bus value defaults to 0.
114 .It Li hostbridge | Li amd_hostbridge
116 Provide a simple host bridge.
117 This is usually configured at slot 0, and is required by most guest
121 emulation is identical but uses a PCI vendor ID of
124 PCI pass-through device.
126 Virtio network interface.
128 Virtio block storage interface.
130 AHCI controller attached to an ATAPI CD/DVD.
132 AHCI controller attached to a SATA hard-drive.
134 PCI 16550 serial device.
136 LPC PCI-ISA bridge with COM1 and COM2 16550 serial ports. The LPC bridge
137 emulation can only be configured on bus 0.
140 This optional parameter describes the backend for device emulations.
143 is not specified, the device emulation has no backend and can be
144 considered unconnected.
148 .It Ar tapN Ns Op , Ns Ar mac=xx:xx:xx:xx:xx:xx
149 .It Ar vmnetN Ns Op , Ns Ar mac=xx:xx:xx:xx:xx:xx
153 is not specified, the MAC address is derived from a fixed OUI and the
154 remaining bytes from an MD5 hash of the slot and function numbers and
157 The MAC address is an ASCII string in
162 Block storage devices:
164 .It Pa /filename Ns Oo , Ns Li nocache Oc Ns Oo , Ns Li direct Oc Ns Oo , Ns Li ro Oc
165 .It Pa /dev/xxx Ns Oo , Ns Ar nocache Oc Ns Oo , Ns Ar direct Oc Ns Oo , Ns Ar ro Oc
174 Force the file to be opened read-only.
182 options are not available for virtio block devices.
188 Connect the serial port to the standard input and output of
191 Use the host TTY device for serial port I/O.
194 Pass-through devices:
196 .It Ns Ar slot Ns / Ns Ar bus Ns / Ns Ar function
197 Connect to a PCI device on the host at the selector described by
205 The host device must have been reserved at boot-time using the
207 loader variable as described in
210 .It Fl l Ar lpcdev Ns Op , Ns Ar conf
211 Allow devices behind the LPC PCI-ISA bridge to be configured.
212 The only supported devices are the TTY-class devices,
216 .It Fl m Ar size Ns Op Ar K|k|M|m|G|g|T|t
217 Guest physical memory size in bytes.
218 This must be the same size that was given to
221 The size argument may be suffixed with one of K, M, G or T (either upper
222 or lower case) to indicate a multiple of kilobytes, megabytes, gigabytes,
224 If no suffix is given, the value is assumed to be in megabytes.
228 to exit when a guest issues an access to an I/O port that is not emulated.
229 This is intended for debug purposes.
231 Ignore accesses to unimplemented Model Specific Registers (MSRs). This is intended for debug purposes.
233 The guest's local APIC is configured in x2APIC mode.
235 Disable MPtable generation.
237 Print help message and exit.
239 Alphanumeric name of the guest.
240 This should be the same as that created by
244 The guest operating system must have been loaded with
246 or a similar boot loader before
250 To run a virtual machine with 1GB of memory, two virtual CPUs, a virtio
251 block device backed by the
253 filesystem image, and a serial port for the console:
254 .Bd -literal -offset indent
255 bhyve -c 2 -s 0,hostbridge -s 1,lpc -s 2,virtio-blk,/my/image \\
256 -l com1,stdio -A -H -P -m 1G vm1
259 Run a 24GB single-CPU virtual machine with three network ports, one of which
260 has a MAC address specified:
261 .Bd -literal -offset indent
262 bhyve -s 0,hostbridge -s 1,lpc -s 2:0,virtio-net,tap0 \\
263 -s 2:1,virtio-net,tap1 \\
264 -s 2:2,virtio-net,tap2,mac=00:be:fa:76:45:00 \\
265 -s 3,virtio-blk,/my/image -l com1,stdio \\
266 -A -H -P -m 24G bigvm
269 Run an 8GB quad-CPU virtual machine with 8 AHCI SATA disks, an AHCI ATAPI
270 CD-ROM, a single virtio network port, an AMD hostbridge, and the console
274 .Bd -literal -offset indent
276 -s 0,amd_hostbridge -s 1,lpc \\
277 -s 1:0,ahci-hd,/images/disk.1 \\
278 -s 1:1,ahci-hd,/images/disk.2 \\
279 -s 1:2,ahci-hd,/images/disk.3 \\
280 -s 1:3,ahci-hd,/images/disk.4 \\
281 -s 1:4,ahci-hd,/images/disk.5 \\
282 -s 1:5,ahci-hd,/images/disk.6 \\
283 -s 1:6,ahci-hd,/images/disk.7 \\
284 -s 1:7,ahci-hd,/images/disk.8 \\
285 -s 2,ahci-cd,/images.install.iso \\
286 -s 3,virtio-net,tap0 \\
287 -l com1,/dev/nmdm0A \\
302 .An Neel Natu Aq neel@freebsd.org
303 .An Peter Grehan Aq grehan@freebsd.org