X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=arch%2Farm64%2FKconfig;h=177f672b9091351fb2a533113d0bb589151a7916;hb=203f1b0cbad5e02fe5198237f0c5f4692ce9b9a7;hp=aceeb91c71de4bd7a73ddf0b17a75447d42a2d30;hpb=8e854569bebc2de9d4638cf79dd354d7619ad522;p=firefly-linux-kernel-4.4.55.git

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index aceeb91c71de..177f672b9091 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -6,6 +6,7 @@ config ARM64
 	select ARCH_HAS_OPP
 	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
 	select ARCH_SUPPORTS_ATOMIC_RMW
+	select ARCH_HAS_GCOV_PROFILE_ALL
 	select ARCH_WANT_OPTIONAL_GPIOLIB
 	select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
 	select ARCH_WANT_FRAME_POINTERS
@@ -88,6 +89,10 @@ config NO_IOPORT
 config STACKTRACE_SUPPORT
 	def_bool y
 
+config ILLEGAL_POINTER_VALUE
+	hex
+	default 0xdead000000000000
+
 config LOCKDEP_SUPPORT
 	def_bool y
 
@@ -124,6 +129,9 @@ config SWIOTLB
 config IOMMU_HELPER
 	def_bool SWIOTLB
 
+config KERNEL_MODE_NEON
+	def_bool y
+
 config FIX_EARLYCON_MEM
 	def_bool y
 
@@ -167,6 +175,32 @@ endmenu
 
 menu "Kernel Features"
 
+menu "ARM errata workarounds"
+
+config ARM64_ERRATUM_845719
+	bool "Cortex-A53: 845719: a load might read incorrect data"
+	depends on COMPAT
+	default n
+	help
+	  This option adds an alternative code sequence to work around ARM
+	  erratum 845719 on Cortex-A53 parts up to r0p4.
+
+	  When running a compat (AArch32) userspace on an affected Cortex-A53
+	  part, a load at EL0 from a virtual address that matches the bottom 32
+	  bits of the virtual address used by a recent load at (AArch64) EL1
+	  might return incorrect data.
+
+	  The workaround is to write the contextidr_el1 register on exception
+	  return to a 32-bit task.
+	  Please note that this does not necessarily enable the workaround,
+	  as it depends on the alternative framework, which will only patch
+	  the kernel if an affected CPU is detected.
+
+	  If unsure, say Y.
+
+endmenu
+
+
 config ARM64_64K_PAGES
 	bool "Enable 64KB pages support"
 	help
@@ -539,6 +573,8 @@ menu "CPU Power Management"
 
 source "drivers/cpuidle/Kconfig"
 
+source "drivers/cpuquiet/Kconfig"
+
 endmenu
 
 source "net/Kconfig"