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Date: Thu, 10 Mar 2016 15:31:43 +0200
Message-ID: <CAHp75Vep=e3HWHHJh-Z6Q9yr8dik715ctbthABxf2Grbuf7jow@mail.gmail.com>
Subject: Re: Got FPU related warning on Intel Quark during boot
From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Borislav Petkov <bp@alien8.de>
Cc: Ingo Molnar <mingo@kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "x86@kernel.org" <x86@kernel.org>,
        Andy Lutomirski <luto@amacapital.net>,
        Fenghua Yu <fenghua.yu@intel.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        "H. Peter Anvin" <hpa@zytor.com>, Thomas Gleixner <tglx@linutronix.de>,
        Andrew Morton <akpm@linux-foundation.org>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Oleg Nesterov <oleg@redhat.com>,
        "Yu, Yu-cheng" <yu-cheng.yu@intel.com>
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On Thu, Mar 10, 2016 at 2:56 PM, Borislav Petkov <bp@alien8.de> wrote:
> On Thu, Mar 10, 2016 at 02:48:09PM +0200, Andy Shevchenko wrote:
>> He-he, my cursor stays on
>>         if (!use_eager_fpu() || !static_cpu_has(X86_FEATURE_FPU)) {
>> while I was having a lunch. So far got from datasheet that some kind
>> of FPU is present there.
>>
>> eagerfpu=auto doesn't fix
>> eagerfpu=off fixes the issue
>
> Looking at the stacktrace, does that quark thing have FXRSTOR?
>
> $ grep -i fxsr /proc/cpuinfo

Looks like it lacks that one.

# grep -i fxsr /proc/cpuinfo; echo $?
1

-- 
With Best Regards,
Andy Shevchenko