diff options
| author | Alex Bennée <alex.bennee@linaro.org> | 2017-02-23 18:29:27 +0000 |
|---|---|---|
| committer | Alex Bennée <alex.bennee@linaro.org> | 2017-02-24 10:32:46 +0000 |
| commit | ca759f9e387db87e1719911f019bc60c74be9ed8 (patch) | |
| tree | 5d328bd7b1c22749e282991182ddd1644e291fab /configure | |
| parent | 4881658a4bf6dc5335e5033d0916b2e86687463d (diff) | |
| download | qemu-ca759f9e387db87e1719911f019bc60c74be9ed8.zip qemu-ca759f9e387db87e1719911f019bc60c74be9ed8.tar.gz qemu-ca759f9e387db87e1719911f019bc60c74be9ed8.tar.bz2 | |
tcg: enable MTTCG by default for ARM on x86 hosts
This enables the multi-threaded system emulation by default for ARMv7
and ARMv8 guests using the x86_64 TCG backend. This is because on the
guest side:
- The ARM translate.c/translate-64.c have been converted to
- use MTTCG safe atomic primitives
- emit the appropriate barrier ops
- The ARM machine has been updated to
- hold the BQL when modifying shared cross-vCPU state
- defer powerctl changes to async safe work
All the host backends support the barrier and atomic primitives but
need to provide same-or-better support for normal load/store
operations.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Pranith Kumar <bobby.prani@gmail.com>
Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 6 |
1 files changed, 6 insertions, 0 deletions
@@ -5879,6 +5879,7 @@ mkdir -p $target_dir echo "# Automatically generated by configure - do not modify" > $config_target_mak bflt="no" +mttcg="no" interp_prefix1=$(echo "$interp_prefix" | sed "s/%M/$target_name/g") gdb_xml_files="" @@ -5897,11 +5898,13 @@ case "$target_name" in arm|armeb) TARGET_ARCH=arm bflt="yes" + mttcg="yes" gdb_xml_files="arm-core.xml arm-vfp.xml arm-vfp3.xml arm-neon.xml" ;; aarch64) TARGET_BASE_ARCH=arm bflt="yes" + mttcg="yes" gdb_xml_files="aarch64-core.xml aarch64-fpu.xml arm-core.xml arm-vfp.xml arm-vfp3.xml arm-neon.xml" ;; cris) @@ -6066,6 +6069,9 @@ if test "$target_bigendian" = "yes" ; then fi if test "$target_softmmu" = "yes" ; then echo "CONFIG_SOFTMMU=y" >> $config_target_mak + if test "$mttcg" = "yes" ; then + echo "TARGET_SUPPORTS_MTTCG=y" >> $config_target_mak + fi fi if test "$target_user_only" = "yes" ; then echo "CONFIG_USER_ONLY=y" >> $config_target_mak |