Thread (41 messages) 41 messages, 5 authors, 2021-10-29

Re: [PATCH v5 02/15] arm64: errata: Add detection for TRBE overwrite in FILL mode

From: Will Deacon <will@kernel.org>
Date: 2021-10-19 11:05:05
Also in: lkml

On Thu, Oct 14, 2021 at 11:31:12PM +0100, Suzuki K Poulose wrote:
Arm Neoverse-N2 and the Cortex-A710 cores are affected
by a CPU erratum where the TRBE will overwrite the trace buffer
in FILL mode. The TRBE doesn't stop (as expected in FILL mode)
when it reaches the limit and wraps to the base to continue
writing upto 3 cache lines. This will overwrite any trace that
was written previously.

Add the Neoverse-N2 erratumi(#2139208) and Cortex-A710 erratum
(#2119858) to the  detection logic.
Weird typo and double space in this sentence.

Will

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