kconfig: add documentation

[qemu.git] / qemu-deprecated.texi

diff --git a/qemu-deprecated.texi b/qemu-deprecated.texi
index dfb278a377d5e18036992b6d37621ad63474a08f..45c57952da5625bdcabd419e4a3ccceb00d72667 100644 (file)
--- a/qemu-deprecated.texi
+++ b/qemu-deprecated.texi
@@ -37,27 +37,6 @@ would automatically enable USB support on the machine type.
 If using the new syntax, USB support must be explicitly
 enabled via the ``-machine usb=on'' argument.
 
-@subsection -no-frame (since 2.12.0)
-
-The @code{--no-frame} argument works with SDL 1.2 only. The other user
-interfaces never implemented this in the first place. So this will be
-removed together with SDL 1.2 support.
-
-@subsection -virtioconsole (since 3.0.0)
-
-Option @option{-virtioconsole} has been replaced by
-@option{-device virtconsole}.
-
-@subsection -clock (since 3.0.0)
-
-The @code{-clock} option is ignored since QEMU version 1.7.0. There is no
-replacement since it is not needed anymore.
-
-@subsection -enable-hax (since 3.0.0)
-
-The @option{-enable-hax} option has been replaced by @option{-accel hax}.
-Both options have been introduced in QEMU version 2.9.0.
-
 @subsection -drive file=json:@{...@{'driver':'file'@}@} (since 3.0)
 
 The 'file' driver for drives is no longer appropriate for character or host
@@ -103,6 +82,11 @@ Use ``device_add'' for hotplugging vCPUs instead of ``cpu-add''.  See
 documentation of ``query-hotpluggable-cpus'' for additional
 details.
 
+@subsection query-events (since 4.0)
+
+The ``query-events'' command has been superseded by the more powerful
+and accurate ``query-qmp-schema'' command.
+
 @section Human Monitor Protocol (HMP) commands
 
 @subsection The hub_id parameter of 'hostfwd_add' / 'hostfwd_remove' (since 3.1)
@@ -161,8 +145,35 @@ The above, converted to the current supported format:
 
 @code{json:@{"file.driver":"rbd", "file.pool":"rbd", "file.image":"name"@}}
 
-@subsection vio-spapr-device device options
+@section Related binaries
+
+@subsection qemu-nbd --partition (since 4.0.0)
+
+The ``qemu-nbd --partition $digit'' code (also spelled @option{-P})
+can only handle MBR partitions, and has never correctly handled
+logical partitions beyond partition 5.  If you know the offset and
+length of the partition (perhaps by using @code{sfdisk} within the
+guest), you can achieve the effect of exporting just that subset of
+the disk by use of the @option{--image-opts} option with a raw
+blockdev using the @code{offset} and @code{size} parameters layered on
+top of any other existing blockdev. For example, if partition 1 is
+100MiB long starting at 1MiB, the old command:
+
+@code{qemu-nbd -t -P 1 -f qcow2 file.qcow2}
+
+can be rewritten as:
+
+@code{qemu-nbd -t --image-opts driver=raw,offset=1M,size=100M,file.driver=qcow2,file.backing.driver=file,file.backing.filename=file.qcow2}
+
+Alternatively, the @code{nbdkit} project provides a more powerful
+partition filter on top of its nbd plugin, which can be used to select
+an arbitrary MBR or GPT partition on top of any other full-image NBD
+export.  Using this to rewrite the above example results in:
 
-@subsubsection "irq": "" (since 3.0.0)
+@code{qemu-nbd -t -k /tmp/sock -f qcow2 file.qcow2 &}
+@code{nbdkit -f --filter=partition nbd socket=/tmp/sock partition=1}
 
-The ``irq'' property is obsoleted.
+Note that if you are exposing the export via /dev/nbd0, it is easier
+to just export the entire image and then mount only /dev/nbd0p1 than
+it is to reinvoke @command{qemu-nbd -c /dev/nbd0} limited to just a
+subset of the image.