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

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>

2 files changed, 3 insertions, 1 deletions

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index d76bf4a83740..bc0bcf01ec98 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -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
diff --git a/arch/arc/plat-hsdk/Kconfig b/arch/arc/plat-hsdk/Kconfig
index 556bc5ef1257..9356753c2ed8 100644
--- a/arch/arc/plat-hsdk/Kconfig
+++ b/arch/arc/plat-hsdk/Kconfig
@@ -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