summaryrefslogtreecommitdiffstats
path: root/arch/arm64/Kconfig
diff options
context:
space:
mode:
authorAndrew Pinski <apinski@cavium.com>2016-02-24 17:44:57 -0800
committerCatalin Marinas <catalin.marinas@arm.com>2016-02-26 15:14:27 +0000
commit104a0c02e8b1936c049e18a6d4e4ab040fb61213 (patch)
tree405d1e134395cca369a63f3580f7f98a326c406e /arch/arm64/Kconfig
parent2f39b5f91eb4bccd786d194e70db1dccad784755 (diff)
downloadblackbird-op-linux-104a0c02e8b1936c049e18a6d4e4ab040fb61213.tar.gz
blackbird-op-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/Kconfig11
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
OpenPOWER on IntegriCloud