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Re: [PATCH v4 2/4] arm64: Work around Falkor erratum 1003

From Will Deacon <will.deacon@arm.com>
Newsgroups linux.kernel
Subject Re: [PATCH v4 2/4] arm64: Work around Falkor erratum 1003
Date 2017-02-01 17:40 +0100
Message-ID <t666R-8hp-7@gated-at.bofh.it> (permalink)
References (1 earlier) <t3y9l-3Do-29@gated-at.bofh.it> <t5FT3-Ha-1@gated-at.bofh.it> <t5KJ4-3yR-17@gated-at.bofh.it> <t5KSK-3Cb-11@gated-at.bofh.it> <t65Xc-8e7-17@gated-at.bofh.it>
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On Wed, Feb 01, 2017 at 11:29:22AM -0500, Christopher Covington wrote:
> On 01/31/2017 12:56 PM, Marc Zyngier wrote:
> > Given that all ARMv8 CPUs can support SW_PAN, it is more likely to be
> > enabled than the ARMv8.1 PAN. I'd vote for supporting the workaround in
> > that case too, and hope that people do enable the HW version.
> 
> Okay, I'll do my best to add support for the SW PAN case. I rebased and
> submitted v6 of the E1009 patch [1] so that it no longer depends on this
> patch landing first, if you all are inclined to pick it up while work on
> this E1003 patch continues.

The alternative is not enabling SW_PAN (at runtime) if this errata is
present, along with a warning stating that hardware-PAN should be
enabled in kconfig instead. Not sure what distributions will make of that
though.

> 1. https://patchwork.kernel.org/patch/9547923/

Yup, I queued that one locally and I'll push to -next tomorrow.

Thanks,

Will

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Re: [PATCH v4 2/4] arm64: Work around Falkor erratum 1003 Mark Rutland <mark.rutland@arm.com> - 2017-01-31 13:40 +0100
  Re: [PATCH v4 2/4] arm64: Work around Falkor erratum 1003 Christopher Covington <cov@codeaurora.org> - 2017-01-31 18:50 +0100
    Re: [PATCH v4 2/4] arm64: Work around Falkor erratum 1003 Marc Zyngier <marc.zyngier@arm.com> - 2017-01-31 19:00 +0100
      Re: [PATCH v4 2/4] arm64: Work around Falkor erratum 1003 Christopher Covington <cov@codeaurora.org> - 2017-02-01 17:30 +0100
        Re: [PATCH v4 2/4] arm64: Work around Falkor erratum 1003 Will Deacon <will.deacon@arm.com> - 2017-02-01 17:40 +0100
          Re: [PATCH v4 2/4] arm64: Work around Falkor erratum 1003 Catalin Marinas <catalin.marinas@arm.com> - 2017-02-01 18:40 +0100
            Re: [PATCH v4 2/4] arm64: Work around Falkor erratum 1003 Will Deacon <will.deacon@arm.com> - 2017-02-01 18:50 +0100
              Re: [PATCH v4 2/4] arm64: Work around Falkor erratum 1003 Will Deacon <will.deacon@arm.com> - 2017-02-01 19:00 +0100
                Re: [PATCH v4 2/4] arm64: Work around Falkor erratum 1003 Catalin Marinas <catalin.marinas@arm.com> - 2017-02-01 19:30 +0100
                Re: [PATCH v4 2/4] arm64: Work around Falkor erratum 1003 Will Deacon <will.deacon@arm.com> - 2017-02-01 19:40 +0100
                Re: [PATCH v4 2/4] arm64: Work around Falkor erratum 1003 Catalin Marinas <catalin.marinas@arm.com> - 2017-02-01 19:40 +0100
                Re: [PATCH v4 2/4] arm64: Work around Falkor erratum 1003 Christopher Covington <cov@codeaurora.org> - 2017-02-08 01:40 +0100
              Re: [PATCH v4 2/4] arm64: Work around Falkor erratum 1003 Catalin Marinas <catalin.marinas@arm.com> - 2017-02-01 19:00 +0100
              Re: [PATCH v4 2/4] arm64: Work around Falkor erratum 1003 Catalin Marinas <catalin.marinas@arm.com> - 2017-02-01 19:00 +0100

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