linux-kernel - Re: [PATCH v9 0/8] Parallel CPU bringup for x86

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <5A3B7074-0C6D-472B-803B-D76541828C1F@infradead.org>
Date:   Tue, 21 Feb 2023 07:53:49 +0000
From:   David Woodhouse <dwmw2@...radead.org>
To:     Oleksandr Natalenko <oleksandr@...alenko.name>
CC:     Kim Phillips <kim.phillips@....com>, tglx@...utronix.de,
        Usama Arif <usama.arif@...edance.com>, arjan@...ux.intel.com,
        mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
        hpa@...or.com, x86@...nel.org, pbonzini@...hat.com,
        paulmck@...nel.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, rcu@...r.kernel.org, mimoja@...oja.de,
        hewenliang4@...wei.com, thomas.lendacky@....com, seanjc@...gle.com,
        pmenzel@...gen.mpg.de, fam.zheng@...edance.com,
        punit.agrawal@...edance.com, simon.evans@...edance.com,
        liangma@...ngbit.com, Piotr Gorski <lucjan.lucjanov@...il.com>,
        "Limonciello, Mario" <Mario.Limonciello@....com>
Subject: Re: [PATCH v9 0/8] Parallel CPU bringup for x86_64



On 21 February 2023 07:27:13 GMT, Oleksandr Natalenko <oleksandr@...alenko.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.

>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.