linux-kernel - Re: [PATCH] x86/mce/AMD: Allow any CPU to initialize smca

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] [day] [month] [year] [list]

Message-ID: <20170717051925.GA18200@nazgul.tnic>
Date:   Mon, 17 Jul 2017 07:19:25 +0200
From:   Borislav Petkov <bp@...e.de>
To:     Yazen Ghannam <Yazen.Ghannam@....com>
Cc:     linux-edac@...r.kernel.org, Tony Luck <tony.luck@...el.com>,
        x86@...nel.org, linux-kernel@...r.kernel.org, jack@...ezen.org
Subject: Re: [PATCH] x86/mce/AMD: Allow any CPU to initialize smca_banks array

On Thu, Jun 29, 2017 at 01:08:28PM -0500, Yazen Ghannam wrote:
> From: Yazen Ghannam <yazen.ghannam@....com>
> 
> Current SMCA implementations have the same banks on each CPU with the
> non-core banks only visible to a "master thread" on each Die. Practically,
> this means the smca_banks array, which describes the banks, only needs to
> be populated once by a single master thread.

...

> If the first CPU up is not a master thread, then it will populate the array
> with all core banks. The first CPU afterwards that is a master thread will
> skip populating the core banks and continue populating the non-core banks.
> Every CPU afterwards will then return early.
> 
> Signed-off-by: Yazen Ghannam <yazen.ghannam@....com>
> ---
>  arch/x86/kernel/cpu/mcheck/mce_amd.c | 9 ++-------
>  1 file changed, 2 insertions(+), 7 deletions(-)

Applied, thanks.

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--