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Re: [PATCH] x86: make clflush a required feature on x86_64

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From: H. Peter Anvin <hpa@...>
To: Kyle McMartin <kyle@...>
Cc: Andi Kleen <andi@...>, <tglx@...>, <mingo@...>, <linux-kernel@...>
Subject: Re: [PATCH] x86: make clflush a required feature on x86_64
Date: Friday, January 18, 2008 - 2:27 am

Kyle McMartin wrote:

Simulators can be fixed, even if it takes time; for something like 
clflush this is easier since clflush can be implemented as a simple noop 
for most of them.

I just verified that Bochs 2.3.0 lacks this CPUID bit whereas the 
current version, 2.3.6, enables CLFLUSH iff SSE2 is enabled.  Qemu 0.9.0 
has CLFLUSH.  Andi, do you happen to know of any specific simulators 
which are problematic?  I would assume any recent version of SimNow is 
up to date.

	-hpa
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Messages in current thread:
[PATCH] x86: make clflush a required feature on x86_64, Kyle McMartin, (Fri Jan 18, 12:59 am)
Re: [PATCH] x86: make clflush a required feature on x86_64, Andi Kleen, (Fri Jan 18, 1:53 am)
Re: [PATCH] x86: make clflush a required feature on x86_64, Kyle McMartin, (Fri Jan 18, 2:01 am)
Re: [PATCH] x86: make clflush a required feature on x86_64, H. Peter Anvin, (Fri Jan 18, 2:27 am)
Re: [PATCH] x86: make clflush a required feature on x86_64, Pavel Machek, (Fri Jan 11, 2:16 pm)
Re: [PATCH] x86: make clflush a required feature on x86_64, Andi Kleen, (Fri Jan 18, 2:54 am)
Re: [PATCH] x86: make clflush a required feature on x86_64, H. Peter Anvin, (Fri Jan 18, 9:56 am)
Re: [PATCH] x86: make clflush a required feature on x86_64, Andi Kleen, (Fri Jan 18, 10:18 am)
Re: [PATCH] x86: make clflush a required feature on x86_64, H. Peter Anvin, (Fri Jan 18, 1:04 am)
[PATCH] x86_64: remove redundant cpu_has_ definitions, Kyle McMartin, (Fri Jan 18, 1:25 am)
Re: [PATCH] x86_64: remove redundant cpu_has_ definitions, Ingo Molnar, (Fri Jan 18, 4:07 am)