Messages in this thread | | | Subject | Re: [PATCH v4 02/15] arm64: errata: Add detection for TRBE overwrite in FILL mode | From | Suzuki K Poulose <> | Date | Thu, 14 Oct 2021 15:17:56 +0100 |
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Hi
Thanks for the report. I have fixed all of them.
Suzuki
On 12/10/2021 16:31, Randy Dunlap wrote: > 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. > >
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