" kernel_irqchip=on|off controls accelerated irqchip support\n"
" kvm_shadow_mem=size of KVM shadow MMU\n"
" dump-guest-core=on|off include guest memory in a core dump (default=on)\n"
- " mem-merge=on|off controls memory merge support (default: on)\n",
+ " mem-merge=on|off controls memory merge support (default: on)\n"
+ " iommu=on|off controls emulated Intel IOMMU (VT-d) support (default=off)\n",
QEMU_ARCH_ALL)
STEXI
@item -machine [type=]@var{name}[,prop=@var{value}[,...]]
Enables or disables memory merge support. This feature, when supported by
the host, de-duplicates identical memory pages among VMs instances
(enabled by default).
+@item iommu=on|off
+Enables or disables emulated Intel IOMMU (VT-d) support. The default is off.
@end table
ETEXI
" size: initial amount of guest memory (default: "
stringify(DEFAULT_RAM_SIZE) "MiB)\n"
" slots: number of hotplug slots (default: none)\n"
- " maxmem: maximum amount of guest memory (default: none)\n",
+ " maxmem: maximum amount of guest memory (default: none)\n"
+ "NOTE: Some architectures might enforce a specific granularity\n",
QEMU_ARCH_ALL)
STEXI
@item -m [size=]@var{megs}
" [,serial=s][,addr=A][,rerror=ignore|stop|report]\n"
" [,werror=ignore|stop|report|enospc][,id=name][,aio=threads|native]\n"
" [,readonly=on|off][,copy-on-read=on|off]\n"
- " [,detect-zeroes=on|off|unmap]\n"
+ " [,discard=ignore|unmap][,detect-zeroes=on|off|unmap]\n"
" [[,bps=b]|[[,bps_rd=r][,bps_wr=w]]]\n"
" [[,iops=i]|[[,iops_rd=r][,iops_wr=w]]]\n"
" [[,bps_max=bm]|[[,bps_rd_max=rm][,bps_wr_max=wm]]]\n"
" use 'src=' to specify source address\n"
" use 'dst=' to specify destination address\n"
" use 'udp=on' to specify udp encapsulation\n"
- " use 'dstport=' to specify destination udp port\n"
+ " use 'srcport=' to specify source udp port\n"
" use 'dstport=' to specify destination udp port\n"
" use 'ipv6=on' to force v6\n"
" L2TPv3 uses cookies to prevent misconfiguration as\n"
DEF("chardev", HAS_ARG, QEMU_OPTION_chardev,
"-chardev null,id=id[,mux=on|off]\n"
- "-chardev socket,id=id[,host=host],port=host[,to=to][,ipv4][,ipv6][,nodelay]\n"
- " [,server][,nowait][,telnet][,mux=on|off] (tcp)\n"
- "-chardev socket,id=id,path=path[,server][,nowait][,telnet],[mux=on|off] (unix)\n"
+ "-chardev socket,id=id[,host=host],port=port[,to=to][,ipv4][,ipv6][,nodelay][,reconnect=seconds]\n"
+ " [,server][,nowait][,telnet][,reconnect=seconds][,mux=on|off] (tcp)\n"
+ "-chardev socket,id=id,path=path[,server][,nowait][,telnet][,reconnect=seconds][,mux=on|off] (unix)\n"
"-chardev udp,id=id[,host=host],port=port[,localaddr=localaddr]\n"
" [,localport=localport][,ipv4][,ipv6][,mux=on|off]\n"
"-chardev msmouse,id=id[,mux=on|off]\n"
A void device. This device will not emit any data, and will drop any data it
receives. The null backend does not take any options.
-@item -chardev socket ,id=@var{id} [@var{TCP options} or @var{unix options}] [,server] [,nowait] [,telnet]
+@item -chardev socket ,id=@var{id} [@var{TCP options} or @var{unix options}] [,server] [,nowait] [,telnet] [,reconnect=@var{seconds}]
Create a two-way stream socket, which can be either a TCP or a unix socket. A
unix socket will be created if @option{path} is specified. Behaviour is
@option{telnet} specifies that traffic on the socket should interpret telnet
escape sequences.
+@option{reconnect} sets the timeout for reconnecting on non-server sockets when
+the remote end goes away. qemu will delay this many seconds and then attempt
+to reconnect. Zero disables reconnecting, and is the default.
+
TCP and unix socket options are given below:
@table @option
@item sslverify
Whether to verify the remote server's certificate when connecting over SSL. It
can have the value 'on' or 'off'. It defaults to 'on'.
+
+@item cookie
+Send this cookie (it can also be a list of cookies separated by ';') with
+each outgoing request. Only supported when using protocols such as HTTP
+which support cookies, otherwise ignored.
+
+@item timeout
+Set the timeout in seconds of the CURL connection. This timeout is the time
+that CURL waits for a response from the remote server to get the size of the
+image to be downloaded. If not set, the default timeout of 5 seconds is used.
@end table
Note that when passing options to qemu explicitly, @option{driver} is the value
@end example
Example: boot from an image stored on a VMware vSphere server with a self-signed
-certificate using a local overlay for writes and a readahead of 64k
+certificate using a local overlay for writes, a readahead of 64k and a timeout
+of 10 seconds.
@example
-qemu-img create -f qcow2 -o backing_file='json:@{"file.driver":"https",, "file.url":"https://user:password@@vsphere.example.com/folder/test/test-flat.vmdk?dcPath=Datacenter&dsName=datastore1",, "file.sslverify":"off",, "file.readahead":"64k"@}' /tmp/test.qcow2
+qemu-img create -f qcow2 -o backing_file='json:@{"file.driver":"https",, "file.url":"https://user:password@@vsphere.example.com/folder/test/test-flat.vmdk?dcPath=Datacenter&dsName=datastore1",, "file.sslverify":"off",, "file.readahead":"64k",, "file.timeout":10@}' /tmp/test.qcow2
qemu-system-x86_64 -drive file=/tmp/test.qcow2
@end example
localhost 5555
@end table
-@item tcp:[@var{host}]:@var{port}[,@var{server}][,nowait][,nodelay]
+@item tcp:[@var{host}]:@var{port}[,@var{server}][,nowait][,nodelay][,reconnect=@var{seconds}]
The TCP Net Console has two modes of operation. It can send the serial
I/O to a location or wait for a connection from a location. By default
the TCP Net Console is sent to @var{host} at the @var{port}. If you use
the @var{server} option QEMU will wait for a client socket application
to connect to the port before continuing, unless the @code{nowait}
option was specified. The @code{nodelay} option disables the Nagle buffering
-algorithm. If @var{host} is omitted, 0.0.0.0 is assumed. Only
+algorithm. The @code{reconnect} option only applies if @var{noserver} is
+set, if the connection goes down it will attempt to reconnect at the
+given interval. If @var{host} is omitted, 0.0.0.0 is assumed. Only
one TCP connection at a time is accepted. You can use @code{telnet} to
connect to the corresponding character device.
@table @code
sequence. Typically in unix telnet you do it with Control-] and then
type "send break" followed by pressing the enter key.
-@item unix:@var{path}[,server][,nowait]
+@item unix:@var{path}[,server][,nowait][,reconnect=@var{seconds}]
A unix domain socket is used instead of a tcp socket. The option works the
same as if you had specified @code{-serial tcp} except the unix domain socket
@var{path} is used for connections.
ETEXI
DEF("icount", HAS_ARG, QEMU_OPTION_icount, \
- "-icount [N|auto]\n" \
+ "-icount [shift=N|auto][,align=on|off]\n" \
" enable virtual instruction counter with 2^N clock ticks per\n" \
- " instruction\n", QEMU_ARCH_ALL)
+ " instruction and enable aligning the host and virtual clocks\n", QEMU_ARCH_ALL)
STEXI
-@item -icount [@var{N}|auto]
+@item -icount [shift=@var{N}|auto]
@findex -icount
Enable virtual instruction counter. The virtual cpu will execute one
instruction every 2^@var{N} ns of virtual time. If @code{auto} is specified
provide cycle accurate emulation. Modern CPUs contain superscalar out of
order cores with complex cache hierarchies. The number of instructions
executed often has little or no correlation with actual performance.
+
+@option{align=on} will activate the delay algorithm which will try to
+to synchronise the host clock and the virtual clock. The goal is to
+have a guest running at the real frequency imposed by the shift option.
+Whenever the guest clock is behind the host clock and if
+@option{align=on} is specified then we print a messsage to the user
+to inform about the delay.
+Currently this option does not work when @option{shift} is @code{auto}.
+Note: The sync algorithm will work for those shift values for which
+the guest clock runs ahead of the host clock. Typically this happens
+when the shift value is high (how high depends on the host machine).
ETEXI
DEF("watchdog", HAS_ARG, QEMU_OPTION_watchdog, \
projects / qemu.git / blobdiff