Re: [PATCH v2 2/6] arm64: Move kill_cpu_early to smp.c

From	Mark Rutland <mark.rutland@arm.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 2/6] arm64: Move kill_cpu_early to smp.c
Date	2015-12-01 19:00 +0100
Message-ID	<qAXnA-4kq-13@gated-at.bofh.it> (permalink)
References	(1 earlier) <qAUSL-2T0-47@gated-at.bofh.it> <qAV2q-2WT-19@gated-at.bofh.it> <qAVF7-3r6-5@gated-at.bofh.it> <qAW8a-3BH-17@gated-at.bofh.it> <qAX4e-4do-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Tue, Dec 01, 2015 at 05:38:54PM +0000, Suzuki K. Poulose wrote:
> On 01/12/15 16:31, Mark Rutland wrote:

[...]

> >We need stuck-in-the-kernel flag to account for CPUs which didn't manage
> >to turn the MMU on (which are either in the spin-table, or failed when
> >they were individually onlined).
> 
> Did you mean to say "turn the MMU off" ?

No, I mean CPUs which were unable to turn the MMU on in the first place.
Perhaps they entered the spin-table but were never individually onlined,
perhaps they didn't support the kernel page size, etc.

When CPUs exit the kernel via PSCI they never switch the MMU off within
the kernel.

Thanks,
Mark.
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Thread

[PATCH v2 0/6] arm64: cpufeature: Add sanity check for ASIDBits "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2015-12-01 16:20 +0100
  [PATCH v2 4/6] arm64: Add hook for checking early CPU features "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2015-12-01 16:20 +0100
  [PATCH v2 1/6] arm64: Introduce kill_cpu_early "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2015-12-01 16:20 +0100
  [PATCH v2 2/6] arm64: Move kill_cpu_early to smp.c "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2015-12-01 16:20 +0100
    Re: [PATCH v2 2/6] arm64: Move kill_cpu_early to smp.c Mark Rutland <mark.rutland@arm.com> - 2015-12-01 16:30 +0100
      Re: [PATCH v2 2/6] arm64: Move kill_cpu_early to smp.c "Suzuki K. Poulose" <Suzuki.Poulose@arm.com> - 2015-12-01 17:10 +0100
        Re: [PATCH v2 2/6] arm64: Move kill_cpu_early to smp.c Mark Rutland <mark.rutland@arm.com> - 2015-12-01 17:40 +0100
          Re: [PATCH v2 2/6] arm64: Move kill_cpu_early to smp.c "Suzuki K. Poulose" <Suzuki.Poulose@arm.com> - 2015-12-01 18:40 +0100
            Re: [PATCH v2 2/6] arm64: Move kill_cpu_early to smp.c Mark Rutland <mark.rutland@arm.com> - 2015-12-01 19:00 +0100
              Re: [PATCH v2 2/6] arm64: Move kill_cpu_early to smp.c "Suzuki K. Poulose" <Suzuki.Poulose@arm.com> - 2015-12-01 19:20 +0100
                Re: [PATCH v2 2/6] arm64: Move kill_cpu_early to smp.c Mark Rutland <mark.rutland@arm.com> - 2015-12-01 20:00 +0100
                Re: [PATCH v2 2/6] arm64: Move kill_cpu_early to smp.c "Suzuki K. Poulose" <Suzuki.Poulose@arm.com> - 2015-12-03 17:40 +0100
                Re: [PATCH v2 2/6] arm64: Move kill_cpu_early to smp.c Mark Rutland <mark.rutland@arm.com> - 2015-12-03 18:10 +0100
  [PATCH v2 6/6] arm64: Ensure the secondary CPUs have safe ASIDBits size "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2015-12-01 16:20 +0100
  [PATCH v2 5/6] arm64: Add helper for extracting ASIDBits "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2015-12-01 16:20 +0100

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