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-rw-r--r--qemu-doc.texi71
-rw-r--r--qemu-options.hx121
2 files changed, 101 insertions, 91 deletions
diff --git a/qemu-doc.texi b/qemu-doc.texi
index e5d7ac41ab..6feac2cdbd 100644
--- a/qemu-doc.texi
+++ b/qemu-doc.texi
@@ -230,12 +230,12 @@ Note that, by default, GUS shares IRQ(7) with parallel ports and so
qemu must be told to not have parallel ports to have working GUS
@example
-qemu dos.img -soundhw gus -parallel none
+qemu-system-i386 dos.img -soundhw gus -parallel none
@end example
Alternatively:
@example
-qemu dos.img -device gus,irq=5
+qemu-system-i386 dos.img -device gus,irq=5
@end example
Or some other unclaimed IRQ.
@@ -251,7 +251,7 @@ CS4231A is the chip used in Windows Sound System and GUSMAX products
Download and uncompress the linux image (@file{linux.img}) and type:
@example
-qemu linux.img
+qemu-system-i386 linux.img
@end example
Linux should boot and give you a prompt.
@@ -261,7 +261,7 @@ Linux should boot and give you a prompt.
@example
@c man begin SYNOPSIS
-usage: qemu [options] [@var{disk_image}]
+usage: qemu-system-i386 [options] [@var{disk_image}]
@c man end
@end example
@@ -575,7 +575,7 @@ QEMU can automatically create a virtual FAT disk image from a
directory tree. In order to use it, just type:
@example
-qemu linux.img -hdb fat:/my_directory
+qemu-system-i386 linux.img -hdb fat:/my_directory
@end example
Then you access access to all the files in the @file{/my_directory}
@@ -585,14 +585,14 @@ them via SAMBA or NFS. The default access is @emph{read-only}.
Floppies can be emulated with the @code{:floppy:} option:
@example
-qemu linux.img -fda fat:floppy:/my_directory
+qemu-system-i386 linux.img -fda fat:floppy:/my_directory
@end example
A read/write support is available for testing (beta stage) with the
@code{:rw:} option:
@example
-qemu linux.img -fda fat:floppy:rw:/my_directory
+qemu-system-i386 linux.img -fda fat:floppy:rw:/my_directory
@end example
What you should @emph{never} do:
@@ -610,14 +610,14 @@ QEMU can access directly to block device exported using the Network Block Device
protocol.
@example
-qemu linux.img -hdb nbd:my_nbd_server.mydomain.org:1024
+qemu-system-i386 linux.img -hdb nbd:my_nbd_server.mydomain.org:1024
@end example
If the NBD server is located on the same host, you can use an unix socket instead
of an inet socket:
@example
-qemu linux.img -hdb nbd:unix:/tmp/my_socket
+qemu-system-i386 linux.img -hdb nbd:unix:/tmp/my_socket
@end example
In this case, the block device must be exported using qemu-nbd:
@@ -633,15 +633,15 @@ qemu-nbd --socket=/tmp/my_socket --share=2 my_disk.qcow2
and then you can use it with two guests:
@example
-qemu linux1.img -hdb nbd:unix:/tmp/my_socket
-qemu linux2.img -hdb nbd:unix:/tmp/my_socket
+qemu-system-i386 linux1.img -hdb nbd:unix:/tmp/my_socket
+qemu-system-i386 linux2.img -hdb nbd:unix:/tmp/my_socket
@end example
If the nbd-server uses named exports (since NBD 2.9.18), you must use the
"exportname" option:
@example
-qemu -cdrom nbd:localhost:exportname=debian-500-ppc-netinst
-qemu -cdrom nbd:localhost:exportname=openSUSE-11.1-ppc-netinst
+qemu-system-i386 -cdrom nbd:localhost:exportname=debian-500-ppc-netinst
+qemu-system-i386 -cdrom nbd:localhost:exportname=openSUSE-11.1-ppc-netinst
@end example
@node disk_images_sheepdog
@@ -666,7 +666,7 @@ qemu-img convert @var{filename} sheepdog:@var{image}
You can boot from the Sheepdog disk image with the command:
@example
-qemu sheepdog:@var{image}
+qemu-system-i386 sheepdog:@var{image}
@end example
You can also create a snapshot of the Sheepdog image like qcow2.
@@ -678,7 +678,7 @@ where @var{tag} is a tag name of the newly created snapshot.
To boot from the Sheepdog snapshot, specify the tag name of the
snapshot.
@example
-qemu sheepdog:@var{image}:@var{tag}
+qemu-system-i386 sheepdog:@var{image}:@var{tag}
@end example
You can create a cloned image from the existing snapshot.
@@ -692,7 +692,7 @@ If the Sheepdog daemon doesn't run on the local host, you need to
specify one of the Sheepdog servers to connect to.
@example
qemu-img create sheepdog:@var{hostname}:@var{port}:@var{image} @var{size}
-qemu sheepdog:@var{hostname}:@var{port}:@var{image}
+qemu-system-i386 sheepdog:@var{hostname}:@var{port}:@var{image}
@end example
@node disk_images_iscsi
@@ -899,7 +899,7 @@ zero-copy communication to the application level of the guests. The basic
syntax is:
@example
-qemu -device ivshmem,size=<size in format accepted by -m>[,shm=<shm name>]
+qemu-system-i386 -device ivshmem,size=<size in format accepted by -m>[,shm=<shm name>]
@end example
If desired, interrupts can be sent between guest VMs accessing the same shared
@@ -909,9 +909,9 @@ is qemu.git/contrib/ivshmem-server. An example syntax when using the shared
memory server is:
@example
-qemu -device ivshmem,size=<size in format accepted by -m>[,chardev=<id>]
- [,msi=on][,ioeventfd=on][,vectors=n][,role=peer|master]
-qemu -chardev socket,path=<path>,id=<id>
+qemu-system-i386 -device ivshmem,size=<size in format accepted by -m>[,chardev=<id>]
+ [,msi=on][,ioeventfd=on][,vectors=n][,role=peer|master]
+qemu-system-i386 -chardev socket,path=<path>,id=<id>
@end example
When using the server, the guest will be assigned a VM ID (>=0) that allows guests
@@ -941,7 +941,7 @@ kernel testing.
The syntax is:
@example
-qemu -kernel arch/i386/boot/bzImage -hda root-2.4.20.img -append "root=/dev/hda"
+qemu-system-i386 -kernel arch/i386/boot/bzImage -hda root-2.4.20.img -append "root=/dev/hda"
@end example
Use @option{-kernel} to provide the Linux kernel image and
@@ -956,8 +956,8 @@ If you do not need graphical output, you can disable it and redirect
the virtual serial port and the QEMU monitor to the console with the
@option{-nographic} option. The typical command line is:
@example
-qemu -kernel arch/i386/boot/bzImage -hda root-2.4.20.img \
- -append "root=/dev/hda console=ttyS0" -nographic
+qemu-system-i386 -kernel arch/i386/boot/bzImage -hda root-2.4.20.img \
+ -append "root=/dev/hda console=ttyS0" -nographic
@end example
Use @key{Ctrl-a c} to switch between the serial console and the
@@ -1020,7 +1020,7 @@ Network adapter that supports CDC ethernet and RNDIS protocols. @var{options}
specifies NIC options as with @code{-net nic,}@var{options} (see description).
For instance, user-mode networking can be used with
@example
-qemu [...OPTIONS...] -net user,vlan=0 -usbdevice net:vlan=0
+qemu-system-i386 [...OPTIONS...] -net user,vlan=0 -usbdevice net:vlan=0
@end example
Currently this cannot be used in machines that support PCI NICs.
@item bt[:@var{hci-type}]
@@ -1030,7 +1030,7 @@ no type is given, the HCI logic corresponds to @code{-bt hci,vlan=0}.
This USB device implements the USB Transport Layer of HCI. Example
usage:
@example
-qemu [...OPTIONS...] -usbdevice bt:hci,vlan=3 -bt device:keyboard,vlan=3
+qemu-system-i386 [...OPTIONS...] -usbdevice bt:hci,vlan=3 -bt device:keyboard,vlan=3
@end example
@end table
@@ -1108,7 +1108,7 @@ For this setup it is recommended to restrict it to listen on a UNIX domain
socket only. For example
@example
-qemu [...OPTIONS...] -vnc unix:/home/joebloggs/.qemu-myvm-vnc
+qemu-system-i386 [...OPTIONS...] -vnc unix:/home/joebloggs/.qemu-myvm-vnc
@end example
This ensures that only users on local box with read/write access to that
@@ -1129,7 +1129,7 @@ option, and then once QEMU is running the password is set with the monitor. Unti
the monitor is used to set the password all clients will be rejected.
@example
-qemu [...OPTIONS...] -vnc :1,password -monitor stdio
+qemu-system-i386 [...OPTIONS...] -vnc :1,password -monitor stdio
(qemu) change vnc password
Password: ********
(qemu)
@@ -1146,7 +1146,7 @@ support provides a secure session, but no authentication. This allows any
client to connect, and provides an encrypted session.
@example
-qemu [...OPTIONS...] -vnc :1,tls,x509=/etc/pki/qemu -monitor stdio
+qemu-system-i386 [...OPTIONS...] -vnc :1,tls,x509=/etc/pki/qemu -monitor stdio
@end example
In the above example @code{/etc/pki/qemu} should contain at least three files,
@@ -1164,7 +1164,7 @@ then validate against the CA certificate. This is a good choice if deploying
in an environment with a private internal certificate authority.
@example
-qemu [...OPTIONS...] -vnc :1,tls,x509verify=/etc/pki/qemu -monitor stdio
+qemu-system-i386 [...OPTIONS...] -vnc :1,tls,x509verify=/etc/pki/qemu -monitor stdio
@end example
@@ -1175,7 +1175,7 @@ Finally, the previous method can be combined with VNC password authentication
to provide two layers of authentication for clients.
@example
-qemu [...OPTIONS...] -vnc :1,password,tls,x509verify=/etc/pki/qemu -monitor stdio
+qemu-system-i386 [...OPTIONS...] -vnc :1,password,tls,x509verify=/etc/pki/qemu -monitor stdio
(qemu) change vnc password
Password: ********
(qemu)
@@ -1198,7 +1198,7 @@ used for authentication, but assuming use of one supporting SSF,
then QEMU can be launched with:
@example
-qemu [...OPTIONS...] -vnc :1,sasl -monitor stdio
+qemu-system-i386 [...OPTIONS...] -vnc :1,sasl -monitor stdio
@end example
@node vnc_sec_certificate_sasl
@@ -1212,7 +1212,7 @@ credentials. This can be enabled, by combining the 'sasl' option
with the aforementioned TLS + x509 options:
@example
-qemu [...OPTIONS...] -vnc :1,tls,x509,sasl -monitor stdio
+qemu-system-i386 [...OPTIONS...] -vnc :1,tls,x509,sasl -monitor stdio
@end example
@@ -1380,8 +1380,8 @@ QEMU has a primitive support to work with gdb, so that you can do
In order to use gdb, launch qemu with the '-s' option. It will wait for a
gdb connection:
@example
-> qemu -s -kernel arch/i386/boot/bzImage -hda root-2.4.20.img \
- -append "root=/dev/hda"
+qemu-system-i386 -s -kernel arch/i386/boot/bzImage -hda root-2.4.20.img \
+ -append "root=/dev/hda"
Connected to host network interface: tun0
Waiting gdb connection on port 1234
@end example
@@ -2669,7 +2669,8 @@ installation directory.
@end itemize
-Wine can be used to launch the resulting qemu.exe compiled for Win32.
+Wine can be used to launch the resulting qemu-system-i386.exe
+and all other qemu-system-@var{target}.exe compiled for Win32.
@node Mac OS X
@section Mac OS X
diff --git a/qemu-options.hx b/qemu-options.hx
index 4170d6177d..17e996349d 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -233,47 +233,47 @@ is off.
Instead of @option{-cdrom} you can use:
@example
-qemu -drive file=file,index=2,media=cdrom
+qemu-system-i386 -drive file=file,index=2,media=cdrom
@end example
Instead of @option{-hda}, @option{-hdb}, @option{-hdc}, @option{-hdd}, you can
use:
@example
-qemu -drive file=file,index=0,media=disk
-qemu -drive file=file,index=1,media=disk
-qemu -drive file=file,index=2,media=disk
-qemu -drive file=file,index=3,media=disk
+qemu-system-i386 -drive file=file,index=0,media=disk
+qemu-system-i386 -drive file=file,index=1,media=disk
+qemu-system-i386 -drive file=file,index=2,media=disk
+qemu-system-i386 -drive file=file,index=3,media=disk
@end example
You can connect a CDROM to the slave of ide0:
@example
-qemu -drive file=file,if=ide,index=1,media=cdrom
+qemu-system-i386 -drive file=file,if=ide,index=1,media=cdrom
@end example
If you don't specify the "file=" argument, you define an empty drive:
@example
-qemu -drive if=ide,index=1,media=cdrom
+qemu-system-i386 -drive if=ide,index=1,media=cdrom
@end example
You can connect a SCSI disk with unit ID 6 on the bus #0:
@example
-qemu -drive file=file,if=scsi,bus=0,unit=6
+qemu-system-i386 -drive file=file,if=scsi,bus=0,unit=6
@end example
Instead of @option{-fda}, @option{-fdb}, you can use:
@example
-qemu -drive file=file,index=0,if=floppy
-qemu -drive file=file,index=1,if=floppy
+qemu-system-i386 -drive file=file,index=0,if=floppy
+qemu-system-i386 -drive file=file,index=1,if=floppy
@end example
By default, @var{interface} is "ide" and @var{index} is automatically
incremented:
@example
-qemu -drive file=a -drive file=b"
+qemu-system-i386 -drive file=a -drive file=b"
@end example
is interpreted like:
@example
-qemu -hda a -hdb b
+qemu-system-i386 -hda a -hdb b
@end example
ETEXI
@@ -297,7 +297,7 @@ STEXI
Set default value of @var{driver}'s property @var{prop} to @var{value}, e.g.:
@example
-qemu -global ide-drive.physical_block_size=4096 -drive file=file,if=ide,index=0,media=disk
+qemu-system-i386 -global ide-drive.physical_block_size=4096 -drive file=file,if=ide,index=0,media=disk
@end example
In particular, you can use this to set driver properties for devices which are
@@ -359,11 +359,11 @@ the recommended is 320x240, 640x480, 800x640.
@example
# try to boot from network first, then from hard disk
-qemu -boot order=nc
+qemu-system-i386 -boot order=nc
# boot from CD-ROM first, switch back to default order after reboot
-qemu -boot once=d
+qemu-system-i386 -boot once=d
# boot with a splash picture for 5 seconds.
-qemu -boot menu=on,splash=/root/boot.bmp,splash-time=5000
+qemu-system-i386 -boot menu=on,splash=/root/boot.bmp,splash-time=5000
@end example
Note: The legacy format '-boot @var{drives}' is still supported but its
@@ -454,12 +454,12 @@ Enable audio and selected sound hardware. Use ? to print all
available sound hardware.
@example
-qemu -soundhw sb16,adlib disk.img
-qemu -soundhw es1370 disk.img
-qemu -soundhw ac97 disk.img
-qemu -soundhw hda disk.img
-qemu -soundhw all disk.img
-qemu -soundhw ?
+qemu-system-i386 -soundhw sb16,adlib disk.img
+qemu-system-i386 -soundhw es1370 disk.img
+qemu-system-i386 -soundhw ac97 disk.img
+qemu-system-i386 -soundhw hda disk.img
+qemu-system-i386 -soundhw all disk.img
+qemu-system-i386 -soundhw ?
@end example
Note that Linux's i810_audio OSS kernel (for AC97) module might
@@ -1368,7 +1368,7 @@ a guest from a local directory.
Example (using pxelinux):
@example
-qemu -hda linux.img -boot n -net user,tftp=/path/to/tftp/files,bootfile=/pxelinux.0
+qemu-system-i386 -hda linux.img -boot n -net user,tftp=/path/to/tftp/files,bootfile=/pxelinux.0
@end example
@item smb=@var{dir}[,smbserver=@var{addr}]
@@ -1403,7 +1403,7 @@ screen 0, use the following:
@example
# on the host
-qemu -net user,hostfwd=tcp:127.0.0.1:6001-:6000 [...]
+qemu-system-i386 -net user,hostfwd=tcp:127.0.0.1:6001-:6000 [...]
# this host xterm should open in the guest X11 server
xterm -display :1
@end example
@@ -1413,7 +1413,7 @@ the guest, use the following:
@example
# on the host
-qemu -net user,hostfwd=tcp::5555-:23 [...]
+qemu-system-i386 -net user,hostfwd=tcp::5555-:23 [...]
telnet localhost 5555
@end example
@@ -1452,20 +1452,22 @@ Examples:
@example
#launch a QEMU instance with the default network script
-qemu linux.img -net nic -net tap
+qemu-system-i386 linux.img -net nic -net tap
@end example
@example
#launch a QEMU instance with two NICs, each one connected
#to a TAP device
-qemu linux.img -net nic,vlan=0 -net tap,vlan=0,ifname=tap0 \
- -net nic,vlan=1 -net tap,vlan=1,ifname=tap1
+qemu-system-i386 linux.img \
+ -net nic,vlan=0 -net tap,vlan=0,ifname=tap0 \
+ -net nic,vlan=1 -net tap,vlan=1,ifname=tap1
@end example
@example
#launch a QEMU instance with the default network helper to
#connect a TAP device to bridge br0
-qemu linux.img -net nic -net tap,"helper=/usr/local/libexec/qemu-bridge-helper"
+qemu-system-i386 linux.img \
+ -net nic -net tap,"helper=/usr/local/libexec/qemu-bridge-helper"
@end example
@item -net bridge[,vlan=@var{n}][,name=@var{name}][,br=@var{bridge}][,helper=@var{helper}]
@@ -1481,13 +1483,13 @@ Examples:
@example
#launch a QEMU instance with the default network helper to
#connect a TAP device to bridge br0
-qemu linux.img -net bridge -net nic,model=virtio
+qemu-system-i386 linux.img -net bridge -net nic,model=virtio
@end example
@example
#launch a QEMU instance with the default network helper to
#connect a TAP device to bridge qemubr0
-qemu linux.img -net bridge,br=qemubr0 -net nic,model=virtio
+qemu-system-i386 linux.img -net bridge,br=qemubr0 -net nic,model=virtio
@end example
@item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}] [,listen=[@var{host}]:@var{port}][,connect=@var{host}:@var{port}]
@@ -1502,12 +1504,14 @@ specifies an already opened TCP socket.
Example:
@example
# launch a first QEMU instance
-qemu linux.img -net nic,macaddr=52:54:00:12:34:56 \
- -net socket,listen=:1234
+qemu-system-i386 linux.img \
+ -net nic,macaddr=52:54:00:12:34:56 \
+ -net socket,listen=:1234
# connect the VLAN 0 of this instance to the VLAN 0
# of the first instance
-qemu linux.img -net nic,macaddr=52:54:00:12:34:57 \
- -net socket,connect=127.0.0.1:1234
+qemu-system-i386 linux.img \
+ -net nic,macaddr=52:54:00:12:34:57 \
+ -net socket,connect=127.0.0.1:1234
@end example
@item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}][,mcast=@var{maddr}:@var{port}[,localaddr=@var{addr}]]
@@ -1530,30 +1534,35 @@ Use @option{fd=h} to specify an already opened UDP multicast socket.
Example:
@example
# launch one QEMU instance
-qemu linux.img -net nic,macaddr=52:54:00:12:34:56 \
- -net socket,mcast=230.0.0.1:1234
+qemu-system-i386 linux.img \
+ -net nic,macaddr=52:54:00:12:34:56 \
+ -net socket,mcast=230.0.0.1:1234
# launch another QEMU instance on same "bus"
-qemu linux.img -net nic,macaddr=52:54:00:12:34:57 \
- -net socket,mcast=230.0.0.1:1234
+qemu-system-i386 linux.img \
+ -net nic,macaddr=52:54:00:12:34:57 \
+ -net socket,mcast=230.0.0.1:1234
# launch yet another QEMU instance on same "bus"
-qemu linux.img -net nic,macaddr=52:54:00:12:34:58 \
- -net socket,mcast=230.0.0.1:1234
+qemu-system-i386 linux.img \
+ -net nic,macaddr=52:54:00:12:34:58 \
+ -net socket,mcast=230.0.0.1:1234
@end example
Example (User Mode Linux compat.):
@example
# launch QEMU instance (note mcast address selected
# is UML's default)
-qemu linux.img -net nic,macaddr=52:54:00:12:34:56 \
- -net socket,mcast=239.192.168.1:1102
+qemu-system-i386 linux.img \
+ -net nic,macaddr=52:54:00:12:34:56 \
+ -net socket,mcast=239.192.168.1:1102
# launch UML
/path/to/linux ubd0=/path/to/root_fs eth0=mcast
@end example
Example (send packets from host's 1.2.3.4):
@example
-qemu linux.img -net nic,macaddr=52:54:00:12:34:56 \
- -net socket,mcast=239.192.168.1:1102,localaddr=1.2.3.4
+qemu-system-i386 linux.img \
+ -net nic,macaddr=52:54:00:12:34:56 \
+ -net socket,mcast=239.192.168.1:1102,localaddr=1.2.3.4
@end example
@item -net vde[,vlan=@var{n}][,name=@var{name}][,sock=@var{socketpath}] [,port=@var{n}][,group=@var{groupname}][,mode=@var{octalmode}]
@@ -1568,7 +1577,7 @@ Example:
# launch vde switch
vde_switch -F -sock /tmp/myswitch
# launch QEMU instance
-qemu linux.img -net nic -net vde,sock=/tmp/myswitch
+qemu-system-i386 linux.img -net nic -net vde,sock=/tmp/myswitch
@end example
@item -net dump[,vlan=@var{n}][,file=@var{file}][,len=@var{len}]
@@ -1853,21 +1862,21 @@ Syntax for specifying iSCSI LUNs is
Example (without authentication):
@example
-qemu -iscsi initiator-name=iqn.2001-04.com.example:my-initiator \
--cdrom iscsi://192.0.2.1/iqn.2001-04.com.example/2 \
--drive file=iscsi://192.0.2.1/iqn.2001-04.com.example/1
+qemu-system-i386 -iscsi initiator-name=iqn.2001-04.com.example:my-initiator \
+ -cdrom iscsi://192.0.2.1/iqn.2001-04.com.example/2 \
+ -drive file=iscsi://192.0.2.1/iqn.2001-04.com.example/1
@end example
Example (CHAP username/password via URL):
@example
-qemu -drive file=iscsi://user%password@@192.0.2.1/iqn.2001-04.com.example/1
+qemu-system-i386 -drive file=iscsi://user%password@@192.0.2.1/iqn.2001-04.com.example/1
@end example
Example (CHAP username/password via environment variables):
@example
LIBISCSI_CHAP_USERNAME="user" \
LIBISCSI_CHAP_PASSWORD="password" \
-qemu -drive file=iscsi://192.0.2.1/iqn.2001-04.com.example/1
+qemu-system-i386 -drive file=iscsi://192.0.2.1/iqn.2001-04.com.example/1
@end example
iSCSI support is an optional feature of QEMU and only available when
@@ -1893,12 +1902,12 @@ Syntax for specifying a NBD device using Unix Domain Sockets
Example for TCP
@example
-qemu --drive file=nbd:192.0.2.1:30000
+qemu-system-i386 --drive file=nbd:192.0.2.1:30000
@end example
Example for Unix Domain Sockets
@example
-qemu --drive file=nbd:unix:/tmp/nbd-socket
+qemu-system-i386 --drive file=nbd:unix:/tmp/nbd-socket
@end example
@item Sheepdog
@@ -1923,7 +1932,7 @@ Syntax for specifying a sheepdog device
Example
@example
-qemu --drive file=sheepdog:192.0.2.1:30000:MyVirtualMachine
+qemu-system-i386 --drive file=sheepdog:192.0.2.1:30000:MyVirtualMachine
@end example
See also @url{http://http://www.osrg.net/sheepdog/}.
@@ -1986,7 +1995,7 @@ and communicate. Requires the Linux @code{vhci} driver installed. Can
be used as following:
@example
-qemu [...OPTIONS...] -bt hci,vlan=5 -bt vhci,vlan=5
+qemu-system-i386 [...OPTIONS...] -bt hci,vlan=5 -bt vhci,vlan=5
@end example
@item -bt device:@var{dev}[,vlan=@var{n}]
@@ -2289,7 +2298,7 @@ connections will likely be TCP-based, but also UDP, pseudo TTY, or even
stdio are reasonable use case. The latter is allowing to start qemu from
within gdb and establish the connection via a pipe:
@example
-(gdb) target remote | exec qemu -gdb stdio ...
+(gdb) target remote | exec qemu-system-i386 -gdb stdio ...
@end example
ETEXI