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ARCv2: [plat-hsdk]: Save accl reg pair by default

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This manifsted as strace segfaulting on HSDK because gcc was targetting
the accumulator registers as GPRs, which kernek was not saving/restoring
by default.

Cc: stable@vger.kernel.org   #4.14+
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2018-07-17 15:21:56 -07:00
parent 93312b6da4
commit af1fc5baa7
2 changed files with 3 additions and 1 deletions
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2
arch/arc/Kconfig
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@ -408,7 +408,7 @@ config ARC_HAS_DIV_REM
config ARC_HAS_ACCL_REGS
bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6)"
default n
default y
help
Depending on the configuration, CPU can contain accumulator reg-pair
(also referred to as r58:r59). These can also be used by gcc as GPR so

2
arch/arc/plat-hsdk/Kconfig
View file

@ -7,6 +7,8 @@
menuconfig ARC_SOC_HSDK
bool "ARC HS Development Kit SOC"
depends on ISA_ARCV2
select ARC_HAS_ACCL_REGS
select CLK_HSDK
select RESET_HSDK
select MIGHT_HAVE_PCI