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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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12
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. to support unaligned memory access which is then disabled by default.
Enable unaligned access in hardware and make software to use it. 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 config FAULT_DUMP
int "Fault dump level" int "Fault dump level"
default 2 default 2