linux-kernel - [PATCH 00/10] arm64: Self-hosted trace related erratum workarouds

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Date:   Wed, 28 Jul 2021 14:52:07 +0100
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, coresight@...ts.linaro.org,
        anshuman.khandual@....com, will@...nel.org,
        catalin.marinas@....com, james.morse@....com,
        mathieu.poirier@...aro.org, mike.leach@...aro.org,
        leo.yan@...aro.org, maz@...nel.org, mark.rutland@....com,
        Suzuki K Poulose <suzuki.poulose@....com>
Subject: [PATCH 00/10] arm64: Self-hosted trace related erratum workarouds


This series adds CPU erratum work arounds related to the self-hosted
tracing. The list of affected errata handled in this series are :

 * TRBE may overwrite trace in FILL mode
   - Arm Neoverse-N2	#2139208
   - Cortex-A710	#2119858

 * A TSB instruction may not flush the trace completely when executed
   in trace prohibited region.

   - Arm Neoverse-N2	#2067961
   - Cortex-A710	#2054223

The series applies on the self-hosted/trbe fixes posted here [0].
A tree containing both the series is available here [1].

 [0] https://lkml.kernel.org/r/20210723124456.3828769-1-suzuki.poulose@arm.com
 [1] git@....gitlab.arm.com:linux-arm/linux-skp.git coresight/errata/trbe-tsb-n2-a710/v1


Suzuki K Poulose (10):
  coresight: trbe: Add infrastructure for Errata handling
  coresight: trbe: Add a helper to calculate the trace generated
  coresight: trbe: Add a helper to pad a given buffer area
  coresight: trbe: Decouple buffer base from the hardware base
  coresight: trbe: Allow driver to choose a different alignment
  arm64: Add Neoverse-N2, Cortex-A710 CPU part definition
  arm64: Add erratum detection for TRBE overwrite in FILL mode
  coresight: trbe: Workaround TRBE errat overwrite in FILL mode
  arm64: Enable workaround for TRBE overwrite in FILL mode
  arm64: errata: Add workaround for TSB flush failures

 Documentation/arm64/silicon-errata.rst       |   8 +
 arch/arm64/Kconfig                           |  70 ++++++
 arch/arm64/include/asm/barrier.h             |  17 +-
 arch/arm64/include/asm/cputype.h             |   4 +
 arch/arm64/kernel/cpu_errata.c               |  44 ++++
 arch/arm64/tools/cpucaps                     |   2 +
 drivers/hwtracing/coresight/coresight-trbe.c | 227 ++++++++++++++++---
 7 files changed, 341 insertions(+), 31 deletions(-)

-- 
2.24.1