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(parent: adae972) | patch
arm64: Avoid Cavium TX2 erratum 219 when switching TTBR
authorMarc Zyngier <marc.zyngier@arm.com>
Tue, 9 Apr 2019 15:22:24 +0000 (16:22 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 29 Oct 2019 08:22:37 +0000 (09:22 +0100)
commit351a0572d40fec408cbae34f02246c68e206ce55
tree3be1d99cf57fb20d52745b9a8d75a1d829e1a395tree | snapshot
parentadae972de033d8f93c75303c2df1e225375f7cfdcommit | diff
arm64: Avoid Cavium TX2 erratum 219 when switching TTBR

commit 9405447ef79bc93101373e130f72e9e6cbf17dbb upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/arm64/include/asm/cpucaps.h diff | blob | history
arch/arm64/kernel/cpu_errata.c diff | blob | history
arch/arm64/kernel/entry.S diff | blob | history
Linux kernels and configurations used by Zygo.