Commit edb5e3ee authored by Vineet Gupta's avatar Vineet Gupta Committed by Greg Kroah-Hartman
Browse files

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



commit af1fc5ba upstream.

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: default avatarVineet Gupta <vgupta@synopsys.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a82d4478

arch/arc/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -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

arch/arc/plat-hsdk/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -7,5 +7,7 @@ 


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