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>

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index d76bf4a..bc0bcf0 100644 (file)
--- 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 556bc5e..9356753 100644 (file)
--- 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