From: Suzuki K Poulose <suzuki.poulose@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, will@kernel.org,
catalin.marinas@arm.com, mathieu.poirier@linaro.org,
mike.leach@linaro.org, leo.yan@linaro.org,
anshuman.khandual@arm.com, coresight@lists.linaro.org,
maz@kernel.org, james.morse@arm.com, mark.rutland@arm.com,
lcherian@marvell.com, Suzuki K Poulose <suzuki.poulose@arm.com>
Subject: [PATCH v3 16/16] arm64: errata: Advertise TRBE erratum workaround for write to out-of-range address
Date: Fri, 8 Oct 2021 19:29:06 +0100 [thread overview]
Message-ID: <20211008182906.1688009-17-suzuki.poulose@arm.com> (raw)
In-Reply-To: <20211008182906.1688009-1-suzuki.poulose@arm.com>
Add Kconfig entries for the errata workarounds for TRBE writing
to an out-of-range address.
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Leo Yan <leo.yan@linaro.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
Documentation/arm64/silicon-errata.rst | 4 +++
arch/arm64/Kconfig | 39 ++++++++++++++++++++++++++
2 files changed, 43 insertions(+)
diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst
index 569a92411dcd..5342e895fb60 100644
--- a/Documentation/arm64/silicon-errata.rst
+++ b/Documentation/arm64/silicon-errata.rst
@@ -96,6 +96,8 @@ stable kernels.
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A710 | #2054223 | ARM64_ERRATUM_2054223 |
+----------------+-----------------+-----------------+-----------------------------+
+| ARM | Cortex-A710 | #2224489 | ARM64_ERRATUM_2224489 |
++----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-N1 | #1188873,1418040| ARM64_ERRATUM_1418040 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-N1 | #1349291 | N/A |
@@ -106,6 +108,8 @@ stable kernels.
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Neoverse-N2 | #2067961 | ARM64_ERRATUM_2067961 |
+----------------+-----------------+-----------------+-----------------------------+
+| ARM | Neoverse-N2 | #2253138 | ARM64_ERRATUM_2253138 |
++----------------+-----------------+-----------------+-----------------------------+
| ARM | MMU-500 | #841119,826419 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
+----------------+-----------------+-----------------+-----------------------------+
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 0764774e12bb..611ae02aabbd 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -736,6 +736,45 @@ config ARM64_ERRATUM_2067961
If unsure, say Y.
+config ARM64_WORKAROUND_TRBE_WRITE_OUT_OF_RANGE
+ bool
+
+config ARM64_ERRATUM_2253138
+ bool "Neoverse-N2: 2253138: workaround TRBE writing to address out-of-range"
+ depends on CORESIGHT_TRBE
+ default y
+ select ARM64_WORKAROUND_TRBE_WRITE_OUT_OF_RANGE
+ help
+ This option adds the workaround for ARM Neoverse-N2 erratum 2253138.
+
+ Affected Neoverse-N2 cores might write to an out-of-range address, not reserved
+ for TRBE. Under some conditions, the TRBE might generate a write to the next
+ virtually addressed page following the last page of the TRBE address space
+ (i.e, the TRBLIMITR_EL1.LIMIT), instead of wrapping around to the base.
+
+ We work around this in the driver by, always making sure that there is a
+ page beyond the TRBLIMITR_EL1.LIMIT, within the space allowed for the TRBE.
+
+ If unsure, say Y.
+
+config ARM64_ERRATUM_2224489
+ bool "Cortex-A710: 2224489: workaround TRBE writing to address out-of-range"
+ depends on CORESIGHT_TRBE
+ default y
+ select ARM64_WORKAROUND_TRBE_WRITE_OUT_OF_RANGE
+ help
+ This option adds the workaround for ARM Cortex-A710 erratum 2224489.
+
+ Affected Cortex-A710 cores might write to an out-of-range address, not reserved
+ for TRBE. Under some conditions, the TRBE might generate a write to the next
+ virtually addressed page following the last page of the TRBE address space
+ (i.e, the TRBLIMITR_EL1.LIMIT), instead of wrapping around to the base.
+
+ We work around this in the driver by, always making sure that there is a
+ page beyond the TRBLIMITR_EL1.LIMIT, within the space allowed for the TRBE.
+
+ If unsure, say Y.
+
config CAVIUM_ERRATUM_22375
bool "Cavium erratum 22375, 24313"
default y
--
2.25.4
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prev parent reply other threads:[~2021-10-08 18:38 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-08 18:28 [PATCH v3 00/16] arm64: Self-hosted trace related errata workarounds Suzuki K Poulose
2021-10-08 18:28 ` [PATCH v3 01/16] arm64: Add Neoverse-N2, Cortex-A710 CPU part definition Suzuki K Poulose
2021-10-08 18:28 ` [PATCH v3 02/16] arm64: errata: Add detection for TRBE overwrite in FILL mode Suzuki K Poulose
2021-10-08 18:28 ` [PATCH v3 03/16] arm64: errata: Add workaround for TSB flush failures Suzuki K Poulose
2021-10-11 10:20 ` Will Deacon
2021-10-08 18:28 ` [PATCH v3 04/16] arm64: errata: Add detection for TRBE write to out-of-range Suzuki K Poulose
2021-10-08 18:28 ` [PATCH v3 05/16] coresight: trbe: Add a helper to calculate the trace generated Suzuki K Poulose
2021-10-08 18:28 ` [PATCH v3 06/16] coresight: trbe: Add a helper to pad a given buffer area Suzuki K Poulose
2021-10-08 18:28 ` [PATCH v3 07/16] coresight: trbe: Decouple buffer base from the hardware base Suzuki K Poulose
2021-10-08 18:28 ` [PATCH v3 08/16] coresight: trbe: Allow driver to choose a different alignment Suzuki K Poulose
2021-10-08 18:28 ` [PATCH v3 09/16] coresight: trbe: Add infrastructure for Errata handling Suzuki K Poulose
2021-10-08 18:29 ` [PATCH v3 10/16] coresight: trbe: Workaround TRBE errata overwrite in FILL mode Suzuki K Poulose
2021-10-08 18:29 ` [PATCH v3 11/16] coresight: trbe: Add a helper to determine the minimum buffer size Suzuki K Poulose
2021-10-08 18:29 ` [PATCH v3 12/16] coresight: trbe: Make sure we have enough space Suzuki K Poulose
2021-10-08 18:29 ` [PATCH v3 13/16] coresight: trbe: Work around write to out of range Suzuki K Poulose
2021-10-08 18:29 ` [PATCH v3 14/16] arm64: errata: Advertise workaround for TRBE overwrite in FILL mode Suzuki K Poulose
2021-10-08 18:29 ` [PATCH v3 15/16] arm64: errata: Advertise the workaround for TSB flush failures Suzuki K Poulose
2021-10-11 10:18 ` Will Deacon
2021-10-11 12:32 ` Suzuki K Poulose
2021-10-08 18:29 ` Suzuki K Poulose [this message]
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