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deprecation: don't enable TCG plugins by default with TCI

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The softmmu memory instrumentation test sees so many more accesses
than a normal translated host and its really not worth fixing up. Lets
deprecate this odd configuration and save on the CI cycles.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240916085400.1046925-3-alex.bennee@linaro.org>
This commit is contained in:
Alex Bennée 2024-09-16 09:53:44 +01:00
parent cf2a78cbbb
commit 7866b0f721
2 changed files with 17 additions and 2 deletions
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7
configure vendored
View File

@ -629,6 +629,9 @@ meson_option_parse() {
exit 1 exit 1
fi fi
} }
has_meson_option() {
test "${meson_options#*"$1"}" != "$meson_options"
}
meson_add_machine_file() { meson_add_machine_file() {
if test "$cross_compile" = "yes"; then if test "$cross_compile" = "yes"; then
@ -1048,8 +1051,12 @@ if test "$static" = "yes" ; then
plugins="no" plugins="no"
fi fi
if test "$plugins" != "no" && test $host_bits -eq 64; then if test "$plugins" != "no" && test $host_bits -eq 64; then
if has_meson_option "-Dtcg_interpreter=true"; then
plugins="no"
else
plugins=yes plugins=yes
subdirs="$subdirs contrib/plugins" subdirs="$subdirs contrib/plugins"
fi
fi fi
cat > $TMPC << EOF cat > $TMPC << EOF

8
docs/about/deprecated.rst
View File

@ -196,6 +196,14 @@ benefits from having plenty of host memory it seems reasonable to
encourage users to use 64 bit builds of QEMU for analysis work encourage users to use 64 bit builds of QEMU for analysis work
whatever targets they are instrumenting. whatever targets they are instrumenting.
TCG Plugin support not enabled by default with TCI (since 9.2)
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
While the TCG interpreter can interpret the TCG ops used by plugins it
is going to be so much slower it wouldn't make sense for any serious
instrumentation. Due to implementation differences there will also be
anomalies in things like memory instrumentation.
System emulator CPUs System emulator CPUs
-------------------- --------------------