linux-kernel - Re: [PATCH v2 3/3] arm64: disable ACPI PPTT support temporarily

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Message-ID: <CAJZ5v0hn+sya29bZJzksDEDt2QPZDY36Hwn=ckw3ikTGp7T1Zw@mail.gmail.com>
Date:   Tue, 5 Jun 2018 17:02:19 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Sudeep Holla <sudeep.holla@....com>
Cc:     ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Catalin Marinas <catalin.marinas@....com>,
        Jeremy Linton <jeremy.linton@....com>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Hanjun Guo <hanjun.guo@...aro.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Will Deacon <will.deacon@....com>
Subject: Re: [PATCH v2 3/3] arm64: disable ACPI PPTT support temporarily

On Tue, Jun 5, 2018 at 4:35 PM, Sudeep Holla <sudeep.holla@....com> wrote:
> Currently, ARM64 doesn't support updating the CPU topology masks on
> CPU hotplug operations. ACPI PPTT support rely on that missing feature
> which is technically not incorrect. Instead of reverting all the PPTT
> support, let's keep it simple and disable ACPI PPTT support on ARM64
> for time-being until the topology updates are added for CPU hotplug
> operations.

When is that going to happen?

Nobody else uses PPTT now.