On 02/09/2016 11:52 AM, Marc Zyngier wrote:
On Tue, 9 Feb 2016 11:29:16 -0800
David Daney <[email protected]> wrote:
Hi David,
From: Andrew Pinski <[email protected]>
On ThunderX T88 pass 1.x through 2.1 parts, broadcast TLBI
instructions may cause the icache to become invalid if it contains
data for a non-current ASID.
This patch implements the workaround (which flushes the local icache
when switching the mm) by using code patching.
Signed-off-by: Andrew Pinski <[email protected]>
Signed-off-by: David Daney <[email protected]>
---
arch/arm64/Kconfig | 11 +++++++++++
arch/arm64/include/asm/cpufeature.h | 3 ++-
arch/arm64/kernel/cpu_errata.c | 9 +++++++++
arch/arm64/mm/proc.S | 12 ++++++++++++
4 files changed, 34 insertions(+), 1 deletion(-)
It would be good to update Documentation/arm64/silicon-errata.txt to
reflect the fact that there is a workaround available for this erratum.
Would you prefer a separate patch for that, or should I roll it into
this one and resubmit?
David Daney
Thanks,
M.
