tree 26de7b36b37913c140cadadf02b7c2ad87d7ea56
parent 9030a6c619e2caba7c081a798a8a819b57ba3853
author Varun Wadekar <vwadekar@nvidia.com> 1646864432 +0000
committer Varun Wadekar <vwadekar@nvidia.com> 1648119348 +0000

fix(errata): workaround for Cortex A78 AE erratum 2395408

Cortex A78 AE erratum 2395408 is a Cat B erratum that applies
to revisions <= r0p1. It is still open.

This erratum states, "A translation table walk that matches an
existing L1 prefetch with a read request outstanding on CHI might
fold into the prefetch, which might lead to data corruption for
a future instruction fetch"

This erratum is avoided by setting CPUACTLR2_EL1[40] to 1 to
disable folding of demand requests into older prefetches with
L2 miss requests outstanding.

SDEN is available at https://developer.arm.com/documentation/SDEN-1707912

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Change-Id: Ic17968987ca3c67fa7f64211bcde6dfcb35ed5d6