Messages in this thread | | | Subject | Re: [PATCH v4 02/15] arm64: errata: Add detection for TRBE overwrite in FILL mode | From | Randy Dunlap <> | Date | Tue, 12 Oct 2021 08:31:18 -0700 |
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Hi,
On 10/12/21 6:17 AM, Suzuki K Poulose wrote: > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index 077f2ec4eeb2..404f56e87e93 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -666,6 +666,47 @@ config ARM64_ERRATUM_1508412 > > If unsure, say Y. > > +config ARM64_WORKAROUND_TRBE_OVERWRITE_FILL_MODE > + bool > + > +config ARM64_ERRATUM_2119858 > + bool "Cortex-A710: 2119858: workaround TRBE overwriting trace data in FILL mode" > + default y > + depends on COMPILE_TEST # Until the CoreSight TRBE driver changes are in > + depends on CORESIGHT_TRBE > + select ARM64_WORKAROUND_TRBE_OVERWRITE_FILL_MODE > + help > + This option adds the workaround for ARM Cortex-A710 erratum 2119858. > + > + Affected Cortex-A710 cores could overwrite upto 3 cache lines of trace
up to
> + data at the base of the buffer (ponited by TRBASER_EL1) in FILL mode in
pointed to by
> + the event of a WRAP event. > + > + Work around the issue by always making sure we move the TRBPTR_EL1 by > + 256bytes before enabling the buffer and filling the first 256bytes of
256 bytes 256 bytes
> + the buffer with ETM ignore packets upon disabling. > + > + If unsure, say Y. > + > +config ARM64_ERRATUM_2139208 > + bool "Neoverse-N2: 2139208: workaround TRBE overwriting trace data in FILL mode" > + default y > + depends on COMPILE_TEST # Until the CoreSight TRBE driver changes are in > + depends on CORESIGHT_TRBE > + select ARM64_WORKAROUND_TRBE_OVERWRITE_FILL_MODE > + help > + This option adds the workaround for ARM Neoverse-N2 erratum 2139208. > + > + Affected Neoverse-N2 cores could overwrite upto 3 cache lines of trace
up to
> + data at the base of the buffer (ponited by TRBASER_EL1) in FILL mode in
pointed to by
> + the event of a WRAP event. > + > + Work around the issue by always making sure we move the TRBPTR_EL1 by > + 256bytes before enabling the buffer and filling the first 256bytes of
256 bytes 256 bytes
> + the buffer with ETM ignore packets upon disabling. > + > + If unsure, say Y.
-- ~Randy
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