Markus Armbruster | 44c6784 | 2018-07-16 09:32:25 +0200 | [diff] [blame] | 1 | @node Deprecated features |
| 2 | @appendix Deprecated features |
| 3 | |
| 4 | In general features are intended to be supported indefinitely once |
| 5 | introduced into QEMU. In the event that a feature needs to be removed, |
| 6 | it will be listed in this appendix. The feature will remain functional |
| 7 | for 2 releases prior to actual removal. Deprecated features may also |
| 8 | generate warnings on the console when QEMU starts up, or if activated |
| 9 | via a monitor command, however, this is not a mandatory requirement. |
| 10 | |
| 11 | Prior to the 2.10.0 release there was no official policy on how |
| 12 | long features would be deprecated prior to their removal, nor |
| 13 | any documented list of which features were deprecated. Thus |
| 14 | any features deprecated prior to 2.10.0 will be treated as if |
| 15 | they were first deprecated in the 2.10.0 release. |
| 16 | |
| 17 | What follows is a list of all features currently marked as |
| 18 | deprecated. |
| 19 | |
| 20 | @section Build options |
| 21 | |
| 22 | @subsection GTK 2.x |
| 23 | |
| 24 | Previously QEMU has supported building against both GTK 2.x |
| 25 | and 3.x series APIs. Support for the GTK 2.x builds will be |
| 26 | discontinued, so maintainers should switch to using GTK 3.x, |
| 27 | which is the default. |
| 28 | |
| 29 | @subsection SDL 1.2 |
| 30 | |
| 31 | Previously QEMU has supported building against both SDL 1.2 |
| 32 | and 2.0 series APIs. Support for the SDL 1.2 builds will be |
| 33 | discontinued, so maintainers should switch to using SDL 2.0, |
| 34 | which is the default. |
| 35 | |
| 36 | @section System emulator command line arguments |
| 37 | |
| 38 | @subsection -no-kvm (since 1.3.0) |
| 39 | |
| 40 | The ``-no-kvm'' argument is now a synonym for setting |
| 41 | ``-machine accel=tcg''. |
| 42 | |
Markus Armbruster | 44c6784 | 2018-07-16 09:32:25 +0200 | [diff] [blame] | 43 | @subsection -tftp (since 2.6.0) |
| 44 | |
| 45 | The ``-tftp /some/dir'' argument is replaced by either |
| 46 | ``-netdev user,id=x,tftp=/some/dir '' (for pluggable NICs, accompanied |
| 47 | with ``-device ...,netdev=x''), or ``-nic user,tftp=/some/dir'' |
| 48 | (for embedded NICs). The new syntax allows different settings to be |
| 49 | provided per NIC. |
| 50 | |
| 51 | @subsection -bootp (since 2.6.0) |
| 52 | |
| 53 | The ``-bootp /some/file'' argument is replaced by either |
| 54 | ``-netdev user,id=x,bootp=/some/file '' (for pluggable NICs, accompanied |
| 55 | with ``-device ...,netdev=x''), or ``-nic user,bootp=/some/file'' |
| 56 | (for embedded NICs). The new syntax allows different settings to be |
| 57 | provided per NIC. |
| 58 | |
| 59 | @subsection -redir (since 2.6.0) |
| 60 | |
| 61 | The ``-redir [tcp|udp]:hostport:[guestaddr]:guestport'' argument is |
| 62 | replaced by either |
| 63 | ``-netdev user,id=x,hostfwd=[tcp|udp]:[hostaddr]:hostport-[guestaddr]:guestport'' |
| 64 | (for pluggable NICs, accompanied with ``-device ...,netdev=x'') or |
| 65 | ``-nic user,hostfwd=[tcp|udp]:[hostaddr]:hostport-[guestaddr]:guestport'' |
| 66 | (for embedded NICs). The new syntax allows different settings to be |
| 67 | provided per NIC. |
| 68 | |
| 69 | @subsection -smb (since 2.6.0) |
| 70 | |
| 71 | The ``-smb /some/dir'' argument is replaced by either |
| 72 | ``-netdev user,id=x,smb=/some/dir '' (for pluggable NICs, accompanied |
| 73 | with ``-device ...,netdev=x''), or ``-nic user,smb=/some/dir'' |
| 74 | (for embedded NICs). The new syntax allows different settings to be |
| 75 | provided per NIC. |
| 76 | |
Markus Armbruster | 44c6784 | 2018-07-16 09:32:25 +0200 | [diff] [blame] | 77 | @subsection -usbdevice (since 2.10.0) |
| 78 | |
| 79 | The ``-usbdevice DEV'' argument is now a synonym for setting |
| 80 | the ``-device usb-DEV'' argument instead. The deprecated syntax |
| 81 | would automatically enable USB support on the machine type. |
| 82 | If using the new syntax, USB support must be explicitly |
| 83 | enabled via the ``-machine usb=on'' argument. |
| 84 | |
| 85 | @subsection -nodefconfig (since 2.11.0) |
| 86 | |
| 87 | The ``-nodefconfig`` argument is a synonym for ``-no-user-config``. |
| 88 | |
| 89 | @subsection -balloon (since 2.12.0) |
| 90 | |
| 91 | The @option{--balloon virtio} argument has been superseded by |
| 92 | @option{--device virtio-balloon}. |
| 93 | |
Markus Armbruster | 44c6784 | 2018-07-16 09:32:25 +0200 | [diff] [blame] | 94 | @subsection -fsdev handle (since 2.12.0) |
| 95 | |
| 96 | The ``handle'' fsdev backend does not support symlinks and causes the 9p |
| 97 | filesystem in the guest to fail a fair amount of tests from the PJD POSIX |
| 98 | filesystem test suite. Also it requires the CAP_DAC_READ_SEARCH capability, |
| 99 | which is not the recommended way to run QEMU. This backend should not be |
| 100 | used and it will be removed with no replacement. |
| 101 | |
| 102 | @subsection -no-frame (since 2.12.0) |
| 103 | |
| 104 | The @code{--no-frame} argument works with SDL 1.2 only. The other user |
| 105 | interfaces never implemented this in the first place. So this will be |
| 106 | removed together with SDL 1.2 support. |
| 107 | |
| 108 | @subsection -rtc-td-hack (since 2.12.0) |
| 109 | |
| 110 | The @code{-rtc-td-hack} option has been replaced by |
| 111 | @code{-rtc driftfix=slew}. |
| 112 | |
| 113 | @subsection -localtime (since 2.12.0) |
| 114 | |
| 115 | The @code{-localtime} option has been replaced by @code{-rtc base=localtime}. |
| 116 | |
| 117 | @subsection -startdate (since 2.12.0) |
| 118 | |
| 119 | The @code{-startdate} option has been replaced by @code{-rtc base=@var{date}}. |
| 120 | |
| 121 | @subsection -virtioconsole (since 3.0.0) |
| 122 | |
| 123 | Option @option{-virtioconsole} has been replaced by |
| 124 | @option{-device virtconsole}. |
| 125 | |
| 126 | @subsection -clock (since 3.0.0) |
| 127 | |
| 128 | The @code{-clock} option is ignored since QEMU version 1.7.0. There is no |
| 129 | replacement since it is not needed anymore. |
| 130 | |
| 131 | @subsection -enable-hax (since 3.0.0) |
| 132 | |
| 133 | The @option{-enable-hax} option has been replaced by @option{-accel hax}. |
| 134 | Both options have been introduced in QEMU version 2.9.0. |
| 135 | |
| 136 | @subsection -drive file=json:@{...@{'driver':'file'@}@} (since 3.0) |
| 137 | |
| 138 | The 'file' driver for drives is no longer appropriate for character or host |
| 139 | devices and will only accept regular files (S_IFREG). The correct driver |
| 140 | for these file types is 'host_cdrom' or 'host_device' as appropriate. |
| 141 | |
| 142 | @section QEMU Machine Protocol (QMP) commands |
| 143 | |
| 144 | @subsection block-dirty-bitmap-add "autoload" parameter (since 2.12.0) |
| 145 | |
| 146 | "autoload" parameter is now ignored. All bitmaps are automatically loaded |
| 147 | from qcow2 images. |
| 148 | |
| 149 | @subsection query-cpus (since 2.12.0) |
| 150 | |
| 151 | The ``query-cpus'' command is replaced by the ``query-cpus-fast'' command. |
| 152 | |
| 153 | @subsection query-cpus-fast "arch" output member (since 3.0.0) |
| 154 | |
| 155 | The ``arch'' output member of the ``query-cpus-fast'' command is |
| 156 | replaced by the ``target'' output member. |
| 157 | |
| 158 | @section System emulator devices |
| 159 | |
| 160 | @subsection ivshmem (since 2.6.0) |
| 161 | |
| 162 | The ``ivshmem'' device type is replaced by either the ``ivshmem-plain'' |
| 163 | or ``ivshmem-doorbell`` device types. |
| 164 | |
| 165 | @subsection Page size support < 4k for embedded PowerPC CPUs (since 2.12.0) |
| 166 | |
| 167 | qemu-system-ppcemb will be removed. qemu-system-ppc (or qemu-system-ppc64) |
| 168 | should be used instead. That means that embedded 4xx PowerPC CPUs will not |
| 169 | support page sizes < 4096 any longer. |
| 170 | |
| 171 | @section System emulator machines |
| 172 | |
| 173 | @subsection pc-0.10 and pc-0.11 (since 3.0) |
| 174 | |
| 175 | These machine types are very old and likely can not be used for live migration |
| 176 | from old QEMU versions anymore. A newer machine type should be used instead. |
| 177 | |
Hervé Poussineau | 9332328 | 2018-08-11 00:46:45 +0200 | [diff] [blame] | 178 | @subsection prep (PowerPC) (since 3.1) |
| 179 | |
| 180 | This machine type uses an unmaintained firmware, broken in lots of ways, |
| 181 | and unable to start post-2004 operating systems. 40p machine type should be |
| 182 | used instead. |
| 183 | |
Markus Armbruster | 44c6784 | 2018-07-16 09:32:25 +0200 | [diff] [blame] | 184 | @section Device options |
| 185 | |
| 186 | @subsection Block device options |
| 187 | |
| 188 | @subsubsection "backing": "" (since 2.12.0) |
| 189 | |
| 190 | In order to prevent QEMU from automatically opening an image's backing |
| 191 | chain, use ``"backing": null'' instead. |
| 192 | |
| 193 | @subsection vio-spapr-device device options |
| 194 | |
| 195 | @subsubsection "irq": "" (since 3.0.0) |
| 196 | |
| 197 | The ``irq'' property is obsoleted. |