Yuanfang Zhang 1315b08f60 coresight-etm4x: add isb() before reading the TRCSTATR ...

[ Upstream commit 4ff6039ffb ]

As recommended by section 4.3.7 ("Synchronization when using system
instructions to progrom the trace unit") of ARM IHI 0064H.b, the
self-hosted trace analyzer must perform a Context synchronization
event between writing to the TRCPRGCTLR and reading the TRCSTATR.
Additionally, add an ISB between the each read of TRCSTATR on
coresight_timeout() when using system instructions to program the
trace unit.

Fixes: 1ab3bb9df5 ("coresight: etm4x: Add necessary synchronization for sysreg access")
Signed-off-by: Yuanfang Zhang <quic_yuanfang@quicinc.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20250116-etm_sync-v4-1-39f2b05e9514@quicinc.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

2025-04-10 14:39:22 +02:00

..

coresight

coresight-etm4x: add isb() before reading the TRCSTATR

2025-04-10 14:39:22 +02:00

intel_th

intel_th: pci: Add Panther Lake-P/U support

2025-03-13 13:02:15 +01:00

ptt

hwtracing: hisi_ptt: Assign parent for event_source device

2024-05-02 11:36:11 +01:00

stm

[tree-wide] finally take no_llseek out

2024-09-27 08:18:43 -07:00

Kconfig

hwtracing: hisi_ptt: Add trace function support for HiSilicon PCIe Tune and Trace device

2022-09-08 16:26:17 -06:00