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| author | Andrew Pinski | 2016-02-25 02:44:57 +0100 |
|---|---|---|
| committer | Catalin Marinas | 2016-02-26 16:14:27 +0100 |
| commit | 104a0c02e8b1936c049e18a6d4e4ab040fb61213 (patch) | |
| tree | 405d1e134395cca369a63f3580f7f98a326c406e /arch/arm64/Kconfig | |
| parent | arm64: mm: Mark .rodata as RO (diff) | |
| download | kernel-qcow2-linux-104a0c02e8b1936c049e18a6d4e4ab040fb61213.tar.gz kernel-qcow2-linux-104a0c02e8b1936c049e18a6d4e4ab040fb61213.tar.xz kernel-qcow2-linux-104a0c02e8b1936c049e18a6d4e4ab040fb61213.zip | |
arm64: Add workaround for Cavium erratum 27456
On ThunderX T88 pass 1.x through 2.1 parts, broadcast TLBI
instructions may cause the icache to become corrupted if it contains
data for a non-current ASID.
This patch implements the workaround (which invalidates the local
icache when switching the mm) by using code patching.
Signed-off-by: Andrew Pinski <apinski@cavium.com>
Signed-off-by: David Daney <david.daney@cavium.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index b6460911dd92..97cd2b9dafd4 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -435,6 +435,17 @@ config CAVIUM_ERRATUM_23154 If unsure, say Y. +config CAVIUM_ERRATUM_27456 + bool "Cavium erratum 27456: Broadcast TLBI instructions may cause icache corruption" + default y + help + On ThunderX T88 pass 1.x through 2.1 parts, broadcast TLBI + instructions may cause the icache to become corrupted if it + contains data for a non-current ASID. The fix is to + invalidate the icache when changing the mm context. + + If unsure, say Y. + endmenu |