From: "H. Peter Anvin" <hpa@zytor.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: mingo@elte.hu, tglx@linutronix.de, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ix86: improve determination of X86_MINIMUM_CPU_FAMILY
Date: Fri, 07 Sep 2012 08:08:40 -0700 [thread overview]
Message-ID: <504A0DF8.2030009@zytor.com> (raw)
In-Reply-To: <5049BEF70200007800099965@nat28.tlf.novell.com>
On 09/07/2012 12:31 AM, Jan Beulich wrote:
>
> Further, the "6" case is then completely pointless - X86_P6_NOP
> depends on X86_64. And with all features the kernel cares about
> that got added with Pentium and later being CPUID-enumerable,
> the "5" case would then be superfluous too.
>
The dependency X86_64 -> X86_P6_NOP is actually not inherent; it is a
worksaround for a broken version of Microsoft HyperV presenting an
inconsistent ISA to the guest. We could allow enabling X86_P6_NOP on 32
bits, in which family should be 6.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
next prev parent reply other threads:[~2012-09-07 15:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-07 6:48 [PATCH] ix86: improve determination of X86_MINIMUM_CPU_FAMILY Jan Beulich
2012-09-07 7:16 ` H. Peter Anvin
2012-09-07 7:31 ` Jan Beulich
2012-09-07 15:08 ` H. Peter Anvin [this message]
2012-09-07 7:36 ` Jan Beulich
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