Re: [PATCH v2] clocksource/arm_arch_timer: Fix masking for high freq counters
From: Marc Zyngier <maz@kernel.org>
Date: 2021-08-08 10:45:01
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On Sun, 08 Aug 2021 02:14:35 +0100, Oliver Upton [off-list ref] wrote:
The only other sane idea that I could come up with is providing this information to the kernel through DT, although that would leave ACPI systems behind.
It also has the disadvantage that a large number of DT timer nodes are a mess of cargo-culted, copy-pasted idioms, and that adding another property would only make it worse. I'm more confident with something that can be either: - checked from EL2 using CNTVOFF, which is complicated, doesn't work at EL1, and leaves us in a weird state if we have different counter width views in the system (BL is such a wonderful concept) - or computed from first principle based on the requirements of the architecture. Thanks, M. -- Without deviation from the norm, progress is not possible. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel