aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorVineet Gupta <vgupta@synopsys.com>2018-07-17 15:21:56 -0700
committerVineet Gupta <vgupta@synopsys.com>2018-07-19 10:36:45 -0700
commitaf1fc5baa724c63ce1733dfcf855bad5ef6078e3 (patch)
treea947ac298a5d3224bc2ac2c2020b85142f267ae9
parentARC: mm: allow mprotect to make stack mappings executable (diff)
downloadlinux-dev-af1fc5baa724c63ce1733dfcf855bad5ef6078e3.tar.xz
linux-dev-af1fc5baa724c63ce1733dfcf855bad5ef6078e3.zip
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>
-rw-r--r--arch/arc/Kconfig2
-rw-r--r--arch/arc/plat-hsdk/Kconfig2
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