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| author | Marc Zyngier <marc.zyngier@arm.com> | 2019-09-13 11:57:50 +0200 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2019-10-08 13:25:25 +0200 |
| commit | 603afdc9438ac546181e843f807253d75d3dbc45 (patch) | |
| tree | 3b6e284befb8384f0babee6d8afff2f6da9cb191 /arch/arm64/Kconfig | |
| parent | arm64: Avoid Cavium TX2 erratum 219 when switching TTBR (diff) | |
| download | linux-603afdc9438ac546181e843f807253d75d3dbc45.tar.xz linux-603afdc9438ac546181e843f807253d75d3dbc45.zip | |
arm64: Allow CAVIUM_TX2_ERRATUM_219 to be selected
Allow the user to select the workaround for TX2-219, and update
the silicon-errata.rst file to reflect this.
Cc: <stable@vger.kernel.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 41a9b4257b72..7d36fd95ae5a 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -617,6 +617,23 @@ 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 |