On Sun, Oct 27, 2019 at 02:53:33PM +0100, gregkh@linuxfoundation.org wrote:
The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 9405447ef79bc93101373e130f72e9e6cbf17dbb Mon Sep 17 00:00:00 2001 From: Marc Zyngier maz@kernel.org Date: Tue, 9 Apr 2019 16:22:24 +0100 Subject: [PATCH] arm64: Avoid Cavium TX2 erratum 219 when switching TTBR
As a PRFM instruction racing against a TTBR update can have undesirable effects on TX2, NOP-out such PRFM on cores that are affected by the TX2-219 erratum.
Cc: stable@vger.kernel.org Signed-off-by: Marc Zyngier marc.zyngier@arm.com Signed-off-by: Will Deacon will@kernel.org
Rather than backporting this, we need to look into backporting the rest of the errata fixes. I'll look into that...