MIME-Version: 1.0
Date:   Tue, 21 Feb 2023 09:05:22 +0100
From:   Oleksandr Natalenko <oleksandr@natalenko.name>
To:     David Woodhouse <dwmw2@infradead.org>
Cc:     Kim Phillips <kim.phillips@amd.com>, tglx@linutronix.de,
        Usama Arif <usama.arif@bytedance.com>, arjan@linux.intel.com,
        mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com,
        hpa@zytor.com, x86@kernel.org, pbonzini@redhat.com,
        paulmck@kernel.org, linux-kernel@vger.kernel.org,
        kvm@vger.kernel.org, rcu@vger.kernel.org, mimoja@mimoja.de,
        hewenliang4@huawei.com, thomas.lendacky@amd.com, seanjc@google.com,
        pmenzel@molgen.mpg.de, fam.zheng@bytedance.com,
        punit.agrawal@bytedance.com, simon.evans@bytedance.com,
        liangma@liangbit.com,
        "Limonciello, Mario" <Mario.Limonciello@amd.com>,
        Piotr Gorski <piotrgorski@cachyos.org>
Subject: Re: [PATCH v9 0/8] Parallel CPU bringup for x86_64
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On 21.02.2023 08:53, David Woodhouse wrote:
> On 21 February 2023 07:27:13 GMT, Oleksandr Natalenko 
> <oleksandr@natalenko.name> wrote:
>> On 21.02.2023 00:30, David Woodhouse wrote:
>>> Oleksandr, please could you show the output of 'cpuid' after a
>>> successful resume?  I'm particularly looking for this part...
>>> 
>>> 
>>> $ sudo cpuid | grep -A1 1/ebx
>>>    miscellaneous (1/ebx):
>>>       process local APIC physical ID = 0x0 (0)
>>> --
>>>    miscellaneous (1/ebx):
>>>       process local APIC physical ID = 0x2 (2)
>>> ...
>> 
>> For me this command doesn't produce any output. Also, no output from 
>> the command Kim used in response to you. With no `grep` it just dumps 
>> a table of raw hex data.
> 
> I'll take the hex please.

Please see here: http://ix.io/4oLm

>> It's `msr-tools` 1.3-4 from Arch. Should I run this command on a 
>> patched kernel booted with `no_parallel_bringup`, or on unpatched 
>> kernel (if that makes any difference)?
> 
> Either works as long as it's after a resume that wouldn't have worked. 
> Thanks.

OK, I'm on an unpatched kernel now.

-- 
   Oleksandr Natalenko (post-factum)