X-Git-Url: https://repo.jachan.dev/qemu.git/blobdiff_plain/e9527dd399ed213ec6eb2c0ea54be663a73032b0..a8d64e735182cbbb5dcc98f41656b118c45e57cc:/qemu-options.hx

diff --git a/qemu-options.hx b/qemu-options.hx
index 733a1949e9..599db9474c 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -1051,6 +1051,7 @@ DEF("spice", HAS_ARG, QEMU_OPTION_spice,
     "       [,streaming-video=[off|all|filter]][,disable-copy-paste]\n"
     "       [,disable-agent-file-xfer][,agent-mouse=[on|off]]\n"
     "       [,playback-compression=[on|off]][,seamless-migration=[on|off]]\n"
+    "       [,gl=[on|off]]\n"
     "   enable spice\n"
     "   at least one of {port, tls-port} is mandatory\n",
     QEMU_ARCH_ALL)
@@ -1142,6 +1143,9 @@ Enable/disable audio stream compression (using celt 0.5.1).  Default is on.
 @item seamless-migration=[on|off]
 Enable/disable spice seamless migration. Default is off.
 
+@item gl=[on|off]
+Enable/disable OpenGL context. Default is off.
+
 @end table
 ETEXI
 
@@ -1472,6 +1476,10 @@ ACPI headers (possible overridden by other options).
 For data=, only data
 portion of the table is used, all header information is specified in the
 command line.
+If a SLIC table is supplied to QEMU, then the SLIC's oem_id and oem_table_id
+fields will override the same in the RSDT and the FADT (a.k.a. FACP), in order
+to ensure the field matches required by the Microsoft SLIC spec and the ACPI
+spec.
 ETEXI
 
 DEF("smbios", HAS_ARG, QEMU_OPTION_smbios,
@@ -2158,8 +2166,49 @@ All devices must have an id, which can be any string up to 127 characters long.
 It is used to uniquely identify this device in other command line directives.
 
 A character device may be used in multiplexing mode by multiple front-ends.
-The key sequence of @key{Control-a} and @key{c} will rotate the input focus
-between attached front-ends. Specify @option{mux=on} to enable this mode.
+Specify @option{mux=on} to enable this mode.
+A multiplexer is a "1:N" device, and here the "1" end is your specified chardev
+backend, and the "N" end is the various parts of QEMU that can talk to a chardev.
+If you create a chardev with @option{id=myid} and @option{mux=on}, QEMU will
+create a multiplexer with your specified ID, and you can then configure multiple
+front ends to use that chardev ID for their input/output. Up to four different
+front ends can be connected to a single multiplexed chardev. (Without
+multiplexing enabled, a chardev can only be used by a single front end.)
+For instance you could use this to allow a single stdio chardev to be used by
+two serial ports and the QEMU monitor:
+
+@example
+-chardev stdio,mux=on,id=char0 \
+-mon chardev=char0,mode=readline,default \
+-serial chardev:char0 \
+-serial chardev:char0
+@end example
+
+You can have more than one multiplexer in a system configuration; for instance
+you could have a TCP port multiplexed between UART 0 and UART 1, and stdio
+multiplexed between the QEMU monitor and a parallel port:
+
+@example
+-chardev stdio,mux=on,id=char0 \
+-mon chardev=char0,mode=readline,default \
+-parallel chardev:char0 \
+-chardev tcp,...,mux=on,id=char1 \
+-serial chardev:char1 \
+-serial chardev:char1
+@end example
+
+When you're using a multiplexed character device, some escape sequences are
+interpreted in the input. @xref{mux_keys, Keys in the character backend
+multiplexer}.
+
+Note that some other command line options may implicitly create multiplexed
+character backends; for instance @option{-serial mon:stdio} creates a
+multiplexed stdio backend connected to the serial port and the QEMU monitor,
+and @option{-nographic} also multiplexes the console and the monitor to
+stdio.
+
+There is currently no support for multiplexing in the other direction
+(where a single QEMU front end takes input and output from multiple chardevs).
 
 Every backend supports the @option{logfile} option, which supplies the path
 to a file to record all data transmitted via the backend. The @option{logappend}