linux-kernel - Re: [PATCH 1/1] x86/tsr: Fix tsc frequency enumeration failure on lightning mountain SoC

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Message-ID: <CAHp75VdJc58PSjgnL48jeae+=pHw28sMj3m+HTcVUZZ8kJTYqg@mail.gmail.com>
Date:   Thu, 30 Jul 2020 10:57:18 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Dilip Kota <eswara.kota@...ux.intel.com>
Cc:     "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        "Tanwar, Rahul" <rahul.tanwar@...ux.intel.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andy Shevchenko <andy@...radead.org>, cheol.yong.kim@...el.com,
        chuanhua.lei@...ux.intel.com, qi-ming.wu@...el.com
Subject: Re: [PATCH 1/1] x86/tsr: Fix tsc frequency enumeration failure on
 lightning mountain SoC

On Thu, Jul 30, 2020 at 9:16 AM Dilip Kota <eswara.kota@...ux.intel.com> wrote:
>
> Frequency descriptor of Lightning Mountain SoC doesn't have all the
> frequency entries so resulting in the below failure causing kernel hang.
>
> [    0.000000] Error MSR_FSB_FREQ index 15 is unknown
> [    0.000000] tsc: Fast TSC calibration failed
>
> So, add all the frequency entries in the Lightning Mountain SoC frequency
> descriptor.

While at this, can you confirm (with maybe good description and
documentation reference) that the numbers in that array are all
correct?

-- 
With Best Regards,
Andy Shevchenko