linux-kernel - Re: [PATCH] x86, CPU, AMD: Add workaround for family 16h, erratum 793

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Message-ID: <20140114203848.GP29865@pd.tnic>
Date:	Tue, 14 Jan 2014 21:38:48 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Aravind Gopalakrishnan <aravind.gopalakrishnan@....com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Henrique de Moraes Holschuh <hmh@....eng.br>,
	X86 ML <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
	Kim Naru <kim.naru@....com>,
	Sherry Hurwitz <sherry.hurwitz@....com>
Subject: Re: [PATCH] x86, CPU, AMD: Add workaround for family 16h, erratum 793

On Tue, Jan 14, 2014 at 02:15:08PM -0600, Aravind Gopalakrishnan wrote:
> Scrubbing the RevGuide for Fam16, I found couple more Errata that need
> workarounds:

Before you go and do that, just ask internally whether those workarounds
are being delivered with AGESA instead. We don't want to have a fix in
the kernel for *every* erratum if it can be helped.

We're making an exception for this one because it can freeze the core
just by executing a locked insn which can be done even in userspace.

> @Boris: Could you please create a branch at bp.git with your patch so
> I can base my work on top of it?

For future AMD patches, make sure to almost always use tip master, i.e.

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git#master

to base your work off of.

> Also, I tested this patch against linux.git on a fam16 based machine
> and it works fine.

Thanks, much appreciated. I'll add your Tested-by.

> (I wasn't sure if you had access to a fam16 based box)

Yeah, I don't. So I'm relying on you for future patches :-)

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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