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ARC: Disable TLS for some configurations

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Disable Thread Local Storage for some configurations of ARC architecture.
For cores with more then one RGF_NUM_BANKS the parameter is disabled
by-default because banks syncronization requires significant time,
and it slows down performance.

Signed-off-by: Nikolay Agishev <agishev@synopsys.com>
This commit is contained in:
Nikolay Agishev 2024-01-19 14:53:53 +03:00 • committed by Fabio Baltieri
commit b898541809
1 changed files with 12 additions and 0 deletions
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arch/arc/Kconfig
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@ -253,6 +253,18 @@ config ARC_USE_UNALIGNED_MEM_ACCESS
to support unaligned memory access which is then disabled by default.
Enable unaligned access in hardware and make software to use it.
config ARC_CURRENT_THREAD_USE_NO_TLS
bool
select CURRENT_THREAD_USE_NO_TLS
default y if (RGF_NUM_BANKS > 1) || ("$(ZEPHYR_TOOLCHAIN_VARIANT)" = "arcmwdt")
help
Disable current Thread Local Storage for ARC. For cores with more then one
RGF_NUM_BANKS the parameter is disabled by-default because banks syncronization
requires significant time, and it slows down performance.
ARCMWDT works with tls pointer in different way then GCC. Optimized access to
TLS pointer via _current variable does not provide significant advantages
in case of MetaWare.
config FAULT_DUMP
int "Fault dump level"
default 2