1.\" Copyright (c) 2013 Peter Grehan 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd April 2, 2014 28.Dt BHYVE 8 29.Os 30.Sh NAME 31.Nm bhyve 32.Nd "run a guest operating system inside a virtual machine" 33.Sh SYNOPSIS 34.Nm 35.Op Fl aehwxAHPW 36.Op Fl c Ar numcpus 37.Op Fl g Ar gdbport 38.Op Fl p Ar pinnedcpu 39.Op Fl s Ar slot,emulation Ns Op , Ns Ar conf 40.Op Fl l Ar lpcdev Ns Op , Ns Ar conf 41.Ar vmname 42.Sh DESCRIPTION 43.Nm 44is an experimental hypervisor that runs guest operating systems inside a 45virtual machine. 46.Pp 47Parameters such as the number of virtual CPUs, amount of guest memory, and 48I/O connectivity can be specified with command-line parameters. 49.Pp 50The guest operating system must be loaded with 51.Xr bhyveload 4 52or a similar boot loader before running 53.Nm . 54.Pp 55.Nm 56runs until the guest operating system reboots or an unhandled hypervisor 57exit is detected. 58.Sh OPTIONS 59.Bl -tag -width 10n 60.It Fl a 61The guest's local APIC is configured in xAPIC mode. 62 63The xAPIC mode is the default setting so this option is redundant. It will be 64deprecated in a future version. 65.It Fl A 66Generate ACPI tables. 67Required for 68.Fx Ns /amd64 69guests. 70.It Fl c Ar numcpus 71Number of guest virtual CPUs. 72The default is 1 and the maximum is 16. 73.It Fl H 74Yield the virtual CPU thread when a HLT instruction is detected. 75If this option is not specified, virtual CPUs will use 100% of a host CPU. 76.It Fl g Ar gdbport 77For 78.Fx Ns /amd64 kernels compiled with 79.Cd "option bvmdebug" , 80allow a remote kernel kgdb to be relayed to the guest kernel gdb stub 81via a local IPv4 address and this port. 82This option will be deprecated in a future version. 83.It Fl p Ar pinnedcpu 84Force guest virtual CPUs to be pinned to host CPUs. 85Virtual CPU 86.Em n 87is pinned to host CPU 88.Em pinnedcpu+n . 89.It Fl P 90Force the guest virtual CPU to exit when a PAUSE instruction is detected. 91.It Fl W 92Force virtio PCI device emulations to use MSI interrupts instead of MSI-X 93interrupts. 94.It Fl s Ar slot,emulation Ns Op , Ns Ar conf 95Configure a virtual PCI slot and function. 96.Pp 97.Nm bhyve 98provides PCI bus emulation and virtual devices that can be attached to 99slots on the bus. 100There are 32 available slots, with the option of providing up to 8 functions 101per slot. 102.Bl -tag -width 10n 103.It Ar slot 104.Ar pcislot[:function] 105 106.Ar bus:pcislot:function 107.Pp 108The 109.Ar pcislot 110value is 0 to 31. The optional function value is 0 to 7. The optional 111.Ar bus 112value is 0 to 255. 113If not specified, the function value defaults to 0. 114If not specified, the bus value defaults to 0. 115.It Ar emulation 116.Bl -tag -width 10n 117.It Li hostbridge | Li amd_hostbridge 118.Pp 119Provide a simple host bridge. 120This is usually configured at slot 0, and is required by most guest 121operating systems. 122The 123.Li amd_hostbridge 124emulation is identical but uses a PCI vendor ID of 125.Li AMD . 126.It Li passthru 127PCI pass-through device. 128.It Li virtio-net 129Virtio network interface. 130.It Li virtio-blk 131Virtio block storage interface. 132.It Li virtio-rnd 133Virtio RNG interface. 134.It Li ahci-cd 135AHCI controller attached to an ATAPI CD/DVD. 136.It Li ahci-hd 137AHCI controller attached to a SATA hard-drive. 138.It Li uart 139PCI 16550 serial device. 140.It Li lpc 141LPC PCI-ISA bridge with COM1 and COM2 16550 serial ports. The LPC bridge 142emulation can only be configured on bus 0. 143.El 144.It Op Ar conf 145This optional parameter describes the backend for device emulations. 146If 147.Ar conf 148is not specified, the device emulation has no backend and can be 149considered unconnected. 150.Pp 151Network devices: 152.Bl -tag -width 10n 153.It Ar tapN Ns Op , Ns Ar mac=xx:xx:xx:xx:xx:xx 154.It Ar vmnetN Ns Op , Ns Ar mac=xx:xx:xx:xx:xx:xx 155.Pp 156If 157.Ar mac 158is not specified, the MAC address is derived from a fixed OUI and the 159remaining bytes from an MD5 hash of the slot and function numbers and 160the device name. 161.Pp 162The MAC address is an ASCII string in 163.Xr ethers 5 164format. 165.El 166.Pp 167Block storage devices: 168.Bl -tag -width 10n 169.It Pa /filename Ns Oo , Ns Li nocache Oc Ns Oo , Ns Li direct Oc Ns Oo , Ns Li ro Oc 170.It Pa /dev/xxx Ns Oo , Ns Ar nocache Oc Ns Oo , Ns Ar direct Oc Ns Oo , Ns Ar ro Oc 171.Bl -tag -width 8n 172.It Li nocache 173Open the file with 174.Dv O_DIRECT . 175.It Li direct 176Open the file using 177.Dv O_SYNC . 178.It Li ro 179Force the file to be opened read-only. 180.El 181.Pp 182The 183.Li nocache , 184.Li direct , 185and 186.Li ro 187options are not available for virtio block devices. 188.El 189.Pp 190TTY devices: 191.Bl -tag -width 10n 192.It Li stdio 193Connect the serial port to the standard input and output of 194the bhyve process. 195.It Pa /dev/xxx 196Use the host TTY device for serial port I/O. 197.El 198.Pp 199Pass-through devices: 200.Bl -tag -width 10n 201.It Ns Ar slot Ns / Ns Ar bus Ns / Ns Ar function 202Connect to a PCI device on the host at the selector described by 203.Ar slot , 204.Ar bus , 205and 206.Ar function 207numbers. 208.El 209.Pp 210The host device must have been reserved at boot-time using the 211.Va pptdev 212loader variable as described in 213.Xr vmm 4 . 214.El 215.It Fl l Ar lpcdev Ns Op , Ns Ar conf 216Allow devices behind the LPC PCI-ISA bridge to be configured. 217The only supported devices are the TTY-class devices, 218.Li com1 219and 220.Li com2 . 221.It Fl m Ar size Ns Op Ar K|k|M|m|G|g|T|t 222Guest physical memory size in bytes. 223This must be the same size that was given to 224.Xr bhyveload 8 . 225.Pp 226The size argument may be suffixed with one of K, M, G or T (either upper 227or lower case) to indicate a multiple of kilobytes, megabytes, gigabytes, 228or terabytes. 229If no suffix is given, the value is assumed to be in megabytes. 230.It Fl e 231Force 232.Nm 233to exit when a guest issues an access to an I/O port that is not emulated. 234This is intended for debug purposes. 235.It Fl w 236Ignore accesses to unimplemented Model Specific Registers (MSRs). This is intended for debug purposes. 237.It Fl x 238The guest's local APIC is configured in x2APIC mode. 239.It Fl h 240Print help message and exit. 241.It Ar vmname 242Alphanumeric name of the guest. 243This should be the same as that created by 244.Xr bhyveload 8 . 245.El 246.Sh EXAMPLES 247The guest operating system must have been loaded with 248.Xr bhyveload 4 249or a similar boot loader before 250.Xr bhyve 4 251can be run. 252.Pp 253To run a virtual machine with 1GB of memory, two virtual CPUs, a virtio 254block device backed by the 255.Pa /my/image 256filesystem image, and a serial port for the console: 257.Bd -literal -offset indent 258bhyve -c 2 -s 0,hostbridge -s 1,lpc -s 2,virtio-blk,/my/image \\ 259 -l com1,stdio -A -H -P -m 1G vm1 260.Ed 261.Pp 262Run a 24GB single-CPU virtual machine with three network ports, one of which 263has a MAC address specified: 264.Bd -literal -offset indent 265bhyve -s 0,hostbridge -s 1,lpc -s 2:0,virtio-net,tap0 \\ 266 -s 2:1,virtio-net,tap1 \\ 267 -s 2:2,virtio-net,tap2,mac=00:be:fa:76:45:00 \\ 268 -s 3,virtio-blk,/my/image -l com1,stdio \\ 269 -A -H -P -m 24G bigvm 270.Ed 271.Pp 272Run an 8GB quad-CPU virtual machine with 8 AHCI SATA disks, an AHCI ATAPI 273CD-ROM, a single virtio network port, an AMD hostbridge, and the console 274port connected to an 275.Xr nmdm 4 276null-model device. 277.Bd -literal -offset indent 278bhyve -c 4 \e\ 279 -s 0,amd_hostbridge -s 1,lpc \\ 280 -s 1:0,ahci-hd,/images/disk.1 \\ 281 -s 1:1,ahci-hd,/images/disk.2 \\ 282 -s 1:2,ahci-hd,/images/disk.3 \\ 283 -s 1:3,ahci-hd,/images/disk.4 \\ 284 -s 1:4,ahci-hd,/images/disk.5 \\ 285 -s 1:5,ahci-hd,/images/disk.6 \\ 286 -s 1:6,ahci-hd,/images/disk.7 \\ 287 -s 1:7,ahci-hd,/images/disk.8 \\ 288 -s 2,ahci-cd,/images.install.iso \\ 289 -s 3,virtio-net,tap0 \\ 290 -l com1,/dev/nmdm0A \\ 291 -A -H -P -m 8G 292.Ed 293.Sh SEE ALSO 294.Xr bhyve 4 , 295.Xr nmdm 4 , 296.Xr vmm 4 , 297.Xr ethers 5 , 298.Xr bhyvectl 8 , 299.Xr bhyveload 8 300.Sh HISTORY 301.Nm 302first appeared in 303.Fx 10.0 . 304.Sh AUTHORS 305.An Neel Natu Aq neel@freebsd.org 306.An Peter Grehan Aq grehan@freebsd.org 307