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Date:   Tue, 19 Oct 2021 13:20:50 +0100
From:   Will Deacon <>
        Daniel Lezcano <>,
        Marc Zyngier <>,
        Will Deacon <>,
        Linus Walleij <>,
        Thomas Gleixner <>,
        Peter Shier <>,
        Ricardo Koller <>,
        Oliver Upton <>,
        Mark Rutland <>,
        Raghavendra Rao Ananta <>
Subject: Re: [PATCH v4 00/17] clocksource/arm_arch_timer: Add basic ARMv8.6 support

On Sun, 17 Oct 2021 13:42:08 +0100, Marc Zyngier wrote:
> This is v4 (final?) of the series enabling ARMv8.6 support for timer
> subsystem, and was prompted by a discussion with Oliver around the
> fact that an ARMv8.6 implementation must have a 1GHz counter, which
> leads to a number of things to break in the timer code:
> - the counter rollover can come pretty quickly as we only advertise a
>   56bit counter,
> - the maximum timer delta can be remarkably small, as we use the
>   countdown interface which is limited to 32bit...
> [...]

Applied 14-17 to arm64 (for-next/8.6-timers), thanks!

[14/17] arm64: Add a capability for FEAT_ECV
[15/17] arm64: Add CNT{P,V}CTSS_EL0 alternatives to cnt{p,v}ct_el0
[16/17] arm64: Add handling of CNTVCTSS traps
[17/17] arm64: Add HWCAP for self-synchronising virtual counter


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