| commit | 4f7f634d6c248779a1fc2cbb2fbb28808cc8a897 | [log] [tgz] |
|---|---|---|
| author | Govindraj Raja <govindraj.raja@arm.com> | Tue Mar 25 16:59:23 2025 -0500 |
| committer | Govindraj Raja <govindraj.raja@arm.com> | Tue Apr 22 16:57:16 2025 -0500 |
| tree | 386c936eafb21e632c33e6bf482b176aa42ceeb6 | |
| parent | 46d1b09bd05c772a04e5c3f6c70672edb1c28a11 [diff] |
fix(cpus): remove errata setting PF_MODE to conservative The erratum titled “Disabling of data prefetcher with outstanding prefetch TLB miss might cause a deadlock” should not be handled within TF-A. The current workaround attempts to follow option 2 but misapplies it. Specifically, it statically sets PF_MODE to conservative, which is not the recommended approach. According to the erratum documentation, PF_MODE should be configured in conservative mode only when we disable data prefetcher however this is not done in TF-A and thus the workaround is not needed in TF-A. The static setting of PF_MODE in TF-A does not correctly address the erratum and may introduce unnecessary performance degradation on platforms that adopt it without fully understanding its implications. To prevent incorrect or unintended use, the current implementation of this erratum workaround should be removed from TF-A and not adopted by platforms. List of Impacted CPU's with Errata Numbers and reference to SDEN - Cortex-A78 - 2132060 - https://developer.arm.com/documentation/SDEN1401784/latest Cortex-A78C - 2132064 - https://developer.arm.com/documentation/SDEN-2004089/latest Cortex-A710 - 2058056 - https://developer.arm.com/documentation/SDEN-1775101/latest Cortex-X2 - 2058056 - https://developer.arm.com/documentation/SDEN-1775100/latest Cortex-X3 - 2070301 - https://developer.arm.com/documentation/SDEN2055130/latest Neoverse-N2 - 2138953 - https://developer.arm.com/documentation/SDEN-1982442/latest Neoverse-V1 - 2108267 - https://developer.arm.com/documentation/SDEN-1401781/latest Neoverse-V2 - 2331132 - https://developer.arm.com/documentation/SDEN-2332927/latest Change-Id: Icf4048508ae070b2df073cc46c63be058b2779df Signed-off-by: Govindraj Raja <govindraj.raja@arm.com> (cherry picked from commit ac9f4b4da6f6ef695a25aa2ed525281a89d40bf9)