linux-kernel - Re: [PATCH v4 0/3] x86/platform/uv: UV Kernel support for UV5

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Date:   Thu, 07 Apr 2022 00:53:08 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Steve Wahl <steve.wahl@....com>, Borislav Petkov <bp@...en8.de>,
        Ingo Molnar <mingo@...hat.com>, x86@...nel.org
Cc:     Mike Travis <mike.travis@....com>, Steve Wahl <steve.wahl@....com>,
        Andy Shevchenko <andy@...radead.org>,
        Darren Hart <dvhart@...radead.org>,
        Dimitri Sivanich <dimitri.sivanich@....com>,
        "H . Peter Anvin" <hpa@...or.com>,
        Russ Anderson <russ.anderson@....com>,
        linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH v4 0/3] x86/platform/uv: UV Kernel support for UV5

On Wed, Apr 06 2022 at 14:51, Steve Wahl wrote:
> v2: Delete patch to remove SCRATCH 5 NMI support check for
>     UV2 and UV3k systems with old NMI support function.
>
> v3: Fix check BIOS NMI support mistake in Patch 1.
>
> v4: Clarify commit messages and comments in all 3 patches.
>     We hope this addresses the issues raised by Thomas Gleixner in
> 	https://lore.kernel.org/r/87zgl02w6v.ffs@tglx
>
>     Update NMI Handler for UV5
> 	Update NMI handler for UV5 hardware. A platform register
> 	changed, and UV5 only uses one of the two NMI methods used on
> 	previous hardware.
>
>     Update TSC sync state for UV5
>
> 	The UV5 platform synchronizes the TSCs among all chassis, and
> 	will not proceed to OS boot without achieving synchronization.
> 	Previous UV platforms provided a register indicating
> 	successful synchronization.  This is no longer available on
> 	UV5.  On this platform TSC_ADJUST should not be reset by the
> 	kernel.
>
>     Log gap hole end size
> 	Show value of gap end in the kernel log which equates to
> 	number of physical address bits used by system.
>
> Mike Travis (3):
>   x86/platform/uv: Update NMI Handler for UV5
>   x86/platform/uv: Update TSC sync state for UV5
>   x86/platform/uv: Log gap hole end size

Acked-by: Thomas Gleixner <tglx@...utronix.de>