dma-direct: provide mmap and get_sgtable method overrides

[linux-2.6-block.git] / arch / arm64 / Kconfig

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 950a56b71ff0dc2d59f0c918606c5b467e1b7967..57606307fe3422bcaebb7cf987c591f83d9a9bf8 100644 (file)
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -12,7 +12,6 @@ config ARM64
        select ARCH_CLOCKSOURCE_DATA
        select ARCH_HAS_DEBUG_VIRTUAL
        select ARCH_HAS_DEVMEM_IS_ALLOWED
-       select ARCH_HAS_DMA_COHERENT_TO_PFN
        select ARCH_HAS_DMA_PREP_COHERENT
        select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI
        select ARCH_HAS_FAST_MULTIPLIER
@@ -616,6 +615,23 @@ 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