Anshuman Khandual ac0ba21002 coresight: trbe: Work around the ignored system register writes ... TRBE implementations affected by Arm erratum #2064142 might fail to write into certain system registers after the TRBE has been disabled. Under some conditions after TRBE has been disabled, writes into certain TRBE registers TRBLIMITR_EL1, TRBPTR_EL1, TRBBASER_EL1, TRBSR_EL1 and TRBTRG_EL1 will be ignored and not be effected. Work around this problem in the TRBE driver by executing TSB CSYNC and DSB just after the trace collection has stopped and before performing a system register write to one of the affected registers. This just updates the TRBE driver as required. Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Suzuki Poulose <suzuki.poulose@arm.com> Cc: coresight@lists.linaro.org Cc: linux-doc@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Link: https://lore.kernel.org/r/1643120437-14352-6-git-send-email-anshuman.khandual@arm.com Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>		2022-03-11 10:06:35 +00:00
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coresight	coresight: trbe: Work around the ignored system register writes	2022-03-11 10:06:35 +00:00
intel_th	bus: Make remove callback return void	2021-07-21 11:53:42 +02:00
stm	stm class: Use correct UUID APIs	2021-04-16 07:26:50 +02:00
Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00