linux-kernel - Re: [PATCH v4 00/17] clocksource/arm_arch

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Message-Id: <163463738200.1805973.16833903783921788275.b4-ty@kernel.org>
Date:   Tue, 19 Oct 2021 13:20:50 +0100
From:   Will Deacon <will@...nel.org>
To:     linux-kernel@...r.kernel.org,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Marc Zyngier <maz@...nel.org>,
        linux-arm-kernel@...ts.infradead.org
Cc:     catalin.marinas@....com, kernel-team@...roid.com,
        Will Deacon <will@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Shier <pshier@...gle.com>,
        Ricardo Koller <ricarkol@...gle.com>,
        Oliver Upton <oupton@...gle.com>,
        Mark Rutland <mark.rutland@....com>,
        Raghavendra Rao Ananta <rananta@...gle.com>
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
        https://git.kernel.org/arm64/c/fdf865988b5a
[15/17] arm64: Add CNT{P,V}CTSS_EL0 alternatives to cnt{p,v}ct_el0
        https://git.kernel.org/arm64/c/9ee840a96042
[16/17] arm64: Add handling of CNTVCTSS traps
        https://git.kernel.org/arm64/c/ae976f063b60
[17/17] arm64: Add HWCAP for self-synchronising virtual counter
        https://git.kernel.org/arm64/c/fee29f008aa3

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev