lkml.org 
[lkml]   [2021]   [Oct]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v4 02/15] arm64: errata: Add detection for TRBE overwrite in FILL mode
From
Date
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

\
 
 \ /
  Last update: 2021-10-12 17:32    [W:0.085 / U:0.564 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site