linux-kernel - Re: [RFC][PATCH 3/3] x86: make MP a required-feature on 64-bit

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Message-ID: <20140620181518.GG11391@pd.tnic>
Date:	Fri, 20 Jun 2014 20:15:18 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Dave Hansen <dave@...1.net>, linux-kernel@...r.kernel.org,
	x86@...nel.org, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [RFC][PATCH 3/3] x86: make MP  a required-feature on 64-bit

On Fri, Jun 20, 2014 at 10:50:25AM -0700, H. Peter Anvin wrote:
> Looking at the AMD init code, there is a whole bunch of other 32/64-bit
> differences that are clearly bogus.  I also see that amd_k7_smp_check()
> doesn't even *exist* on 64 bits, and that init_amd_k7() which calls
> amd_k7_smp_check() only is ever called for family == 6, despite having
> tests for family 7 and above in it.

No, K7 is family 6. The tests are for c->x86_model, or am I looking at
the wrong place?

OTOH, init_amd() could probably use a cleanup of moving the per-family
code into init_amd_<fam>() functions and extending the switch-case.

I'll take a look.

-- 
Regards/Gruss,
    Boris.

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