From: Borislav Petkov <bp@alien8.de>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Dave Hansen <dave@sr71.net>,
linux-kernel@vger.kernel.org, x86@kernel.org,
Andi Kleen <ak@linux.intel.com>, Dave Jones <davej@redhat.com>
Subject: Re: [RFC][PATCH 3/3] x86: make MP a required-feature on 64-bit
Date: Fri, 20 Jun 2014 20:05:23 +0200 [thread overview]
Message-ID: <20140620180523.GF11391@pd.tnic> (raw)
In-Reply-To: <53A473AA.7050301@zytor.com>
On Fri, Jun 20, 2014 at 10:47:22AM -0700, H. Peter Anvin wrote:
> This is run before static_cpu_has().
static_cpu_has_safe() then - I didn't do it for no reason :-)
> The point, though, was that we "enforce" (taint) on 32 bits but not on
> 64 bits, which is clearly wrong.
Yeah, K7 is 32-bit only.
> My inclination is to completely kill amd_k7_smp_check() entirely,
> since noone seems to know when it actually matters and it is clearly
> historic.
I think DaveJ should know something about it - he gave that impression
last time when we were discussing 8c90487cdc64 ("Rename TAINT_UNSAFE_SMP
to TAINT_CPU_OUT_OF_SPEC").
CCed.
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
next prev parent reply other threads:[~2014-06-20 18:05 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-20 16:17 [RFC][PATCH 1/3] x86: introduce disabled-features Dave Hansen
2014-06-20 16:17 ` [RFC][PATCH 2/3] x86: add more disabled features Dave Hansen
2014-06-20 16:17 ` [RFC][PATCH 3/3] x86: make MP a required-feature on 64-bit Dave Hansen
2014-06-20 16:23 ` H. Peter Anvin
2014-06-20 16:30 ` Dave Hansen
2014-06-20 16:37 ` H. Peter Anvin
2014-06-20 17:43 ` Borislav Petkov
2014-06-20 17:47 ` H. Peter Anvin
2014-06-20 18:05 ` Borislav Petkov [this message]
2014-06-20 18:16 ` Dave Jones
2014-06-20 18:48 ` Borislav Petkov
2014-06-20 18:54 ` H. Peter Anvin
2014-06-20 20:00 ` Borislav Petkov
2014-06-20 20:22 ` H. Peter Anvin
2014-06-20 20:35 ` Borislav Petkov
2014-06-20 17:50 ` H. Peter Anvin
2014-06-20 18:15 ` Borislav Petkov
2014-06-20 18:57 ` H. Peter Anvin
2014-06-20 20:37 ` Borislav Petkov
2014-06-23 6:11 ` Andi Kleen
2014-06-20 16:20 ` [RFC][PATCH 1/3] x86: introduce disabled-features H. Peter Anvin
2014-06-20 17:20 ` Dave Hansen
2014-06-20 20:40 ` Dave Hansen
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