linux-kernel - Re: [PATCH v2 1/8] x86/CPU/AMD: Save NodeId on AMD-based systems

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]

Date:   Thu, 17 Sep 2020 22:10:27 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Yazen Ghannam <yazen.ghannam@....com>
Cc:     linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org,
        tony.luck@...el.com, x86@...nel.org,
        Smita.KoralahalliChannabasappa@....com
Subject: Re: [PATCH v2 1/8] x86/CPU/AMD: Save NodeId on AMD-based systems

On Thu, Sep 17, 2020 at 02:44:25PM -0500, Yazen Ghannam wrote:
> Yes, I think so. "Die" is not defined in CPUID(0xb), only SMT and Core,
> so the cpu_die_id value is not valid.

Right.

> In which case, we can overwrite it. CPUID(0xb) doesn't have anything
> equivalent to AMD NodeId. So on systems with CPUID < 0x1F, we should
> be okay with using cpu_die_id equal to AMD NodeId.

Right.

> I have an idea on what to do, so I'll send another rev if that's okay.
> Do you have any comments on the other patches in the set?

Lemme go through them these days.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette