tcg: Remove TCI experimental status

The following commits (released in v6.0.0) made raised the
quality of the TCI backend to the other TCG architectures,
thus is is not considerated experimental anymore:
- c6fbea47664..2f74f45e32b
- dc09f047edd..9e9acb7b348
- b6139eb0578..2fc6f16ca5e
- dbcbda2cd84..5e8892db93f

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20211106111457.517546-1-f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

docs/about/build-platforms.rst

@@ -54,10 +54,12 @@ Those hosts are officially supported, with various accelerators:
    * - x86
      - hax, hvf (64 bit only), kvm, nvmm, tcg, whpx (64 bit only), xen
 
-Other host architectures are not supported. It is possible to build QEMU on an
+Other host architectures are not supported. It is possible to build QEMU system
-unsupported host architecture using the configure ``--enable-tcg-interpreter``
+emulation on an unsupported host architecture using the configure
-option to enable the experimental TCI support, but note that this is very slow
+``--enable-tcg-interpreter`` option to enable the TCI support, but note that
-and is not recommended.
+this is very slow and is not recommended for normal use. QEMU user emulation
+requires host-specific support for signal handling, therefore TCI won't help
+on unsupported host architectures.
 
 Non-supported architectures may be removed in the future following the
 :ref:`deprecation process<Deprecated features>`.

meson.build

@@ -335,7 +335,7 @@ tcg_arch = config_host['ARCH']
 if not get_option('tcg').disabled()
   if cpu not in supported_cpus
     if get_option('tcg_interpreter')
-      warning('Unsupported CPU @0@, will use TCG with TCI (experimental and slow)'.format(cpu))
+      warning('Unsupported CPU @0@, will use TCG with TCI (slow)'.format(cpu))
     else
       error('Unsupported CPU @0@, try --enable-tcg-interpreter'.format(cpu))
     endif
@@ -3290,7 +3290,7 @@ endif
 summary_info += {'TCG support':       config_all.has_key('CONFIG_TCG')}
 if config_all.has_key('CONFIG_TCG')
   if get_option('tcg_interpreter')
-    summary_info += {'TCG backend':   'TCI (TCG with bytecode interpreter, experimental and slow)'}
+    summary_info += {'TCG backend':   'TCI (TCG with bytecode interpreter, slow)'}
   else
     summary_info += {'TCG backend':   'native (@0@)'.format(cpu)}
   endif

meson_options.txt

@@ -59,7 +59,7 @@ option('xen_pci_passthrough', type: 'feature', value: 'auto',
 option('tcg', type: 'feature', value: 'auto',
        description: 'TCG support')
 option('tcg_interpreter', type: 'boolean', value: false,
-       description: 'TCG with bytecode interpreter (experimental and slow)')
+       description: 'TCG with bytecode interpreter (slow)')
 option('cfi', type: 'boolean', value: 'false',
        description: 'Control-Flow Integrity (CFI)')
 option('cfi_debug', type: 'boolean', value: 'false',

scripts/meson-buildoptions.sh

@@ -13,8 +13,7 @@ meson_options_help() {
   printf "%s\n" '                           jemalloc/system/tcmalloc)'
   printf "%s\n" '  --enable-slirp[=CHOICE]  Whether and how to find the slirp library'
   printf "%s\n" '                           (choices: auto/disabled/enabled/internal/system)'
-  printf "%s\n" '  --enable-tcg-interpreter TCG with bytecode interpreter (experimental and'
+  printf "%s\n" '  --enable-tcg-interpreter TCG with bytecode interpreter (slow)'
-  printf "%s\n" '                           slow)'
   printf "%s\n" '  --enable-trace-backends=CHOICE'
   printf "%s\n" '                           Set available tracing backends [log] (choices:'
   printf "%s\n" '                           dtrace/ftrace/log/nop/simple/syslog/ust)'