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-rw-r--r--arch/arm64/Kconfig32
1 files changed, 30 insertions, 2 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 41a9b4257b72..3f047afb982c 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -110,7 +110,6 @@ config ARM64
select GENERIC_STRNLEN_USER
select GENERIC_TIME_VSYSCALL
select GENERIC_GETTIMEOFDAY
- select GENERIC_COMPAT_VDSO if (!CPU_BIG_ENDIAN && COMPAT)
select HANDLE_DOMAIN_IRQ
select HARDIRQS_SW_RESEND
select HAVE_PCI
@@ -617,6 +616,23 @@ config CAVIUM_ERRATUM_30115
If unsure, say Y.
+config CAVIUM_TX2_ERRATUM_219
+ bool "Cavium ThunderX2 erratum 219: PRFM between TTBR change and ISB fails"
+ default y
+ help
+ On Cavium ThunderX2, a load, store or prefetch instruction between a
+ TTBR update and the corresponding context synchronizing operation can
+ cause a spurious Data Abort to be delivered to any hardware thread in
+ the CPU core.
+
+ Work around the issue by avoiding the problematic code sequence and
+ trapping KVM guest TTBRx_EL1 writes to EL2 when SMT is enabled. The
+ trap handler performs the corresponding register access, skips the
+ instruction and ensures context synchronization by virtue of the
+ exception return.
+
+ If unsure, say Y.
+
config QCOM_FALKOR_ERRATUM_1003
bool "Falkor E1003: Incorrect translation due to ASID change"
default y
@@ -1159,7 +1175,7 @@ menuconfig COMPAT
if COMPAT
config KUSER_HELPERS
- bool "Enable kuser helpers page for 32 bit applications"
+ bool "Enable kuser helpers page for 32-bit applications"
default y
help
Warning: disabling this option may break 32-bit user programs.
@@ -1185,6 +1201,18 @@ config KUSER_HELPERS
Say N here only if you are absolutely certain that you do not
need these helpers; otherwise, the safe option is to say Y.
+config COMPAT_VDSO
+ bool "Enable vDSO for 32-bit applications"
+ depends on !CPU_BIG_ENDIAN && "$(CROSS_COMPILE_COMPAT)" != ""
+ select GENERIC_COMPAT_VDSO
+ default y
+ help
+ Place in the process address space of 32-bit applications an
+ ELF shared object providing fast implementations of gettimeofday
+ and clock_gettime.
+
+ You must have a 32-bit build of glibc 2.22 or later for programs
+ to seamlessly take advantage of this.
menuconfig ARMV8_DEPRECATED
bool "Emulate deprecated/obsolete ARMv8 instructions"