linux-kernel - Re: [PATCH v2 1/7] EDAC/amd64: Support more than two controllers for chip selects handling

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:   Fri, 2 Aug 2019 08:49:53 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     "Ghannam, Yazen" <Yazen.Ghannam@....com>
Cc:     "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/7] EDAC/amd64: Support more than two controllers for
 chip selects handling

On Tue, Jul 09, 2019 at 09:56:54PM +0000, Ghannam, Yazen wrote:
> From: Yazen Ghannam <yazen.ghannam@....com>
> 
> The struct chip_select array that's used for saving chip select bases
> and masks is fixed at length of two. There should be one struct
> chip_select for each controller, so this array should be increased to
> support systems that may have more than two controllers.
> 
> Increase the size of the struct chip_select array to eight, which is the
> largest number of controllers per die currently supported on AMD
> systems.
> 
> Fix number of DIMMs and Chip Select bases/masks on Family17h, because AMD
> Family 17h systems support 2 DIMMs, 4 CS bases, and 2 CS masks per
> channel.
> 
> Also, carve out the Family 17h+ reading of the bases/masks into a
> separate function. This effectively reverts the original bases/masks
> reading code to before Family 17h support was added.
> 
> This is a second version of a commit that was reverted.
> 
> Fixes: 07ed82ef93d6 ("EDAC, amd64: Add Fam17h debug output")
> Fixes: 8de9930a4618 ("Revert "EDAC/amd64: Support more than two controllers for chip select handling"")

I'm not sure about those Fixes: tags you're slapping everywhere. First
of all, 8de9930a4618 is a revert so how can this be fixing a revert? If
anything, it should be fixing the original commit

  0a227af521d6 ("EDAC/amd64: Support more than two controllers for chip select handling")

which tried the more-than-2-memory-controllers thing.

But, it is not really a fix for that commit but a second attempt at it.
Which is not really a fix but hw enablement.

So I'm dropping those tags here. If you want them in stable, pls
backport them properly and test them on the respective stable kernels
before sending them to stable.

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.