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

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To: H. Peter Anvin <hpa@...>

Cc: Kyle McMartin <kyle@...>, Andi Kleen <andi@...>, <tglx@...>, <mingo@...>, <linux-kernel@...>

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

Date: Friday, January 11, 2008 - 2:16 pm

On Fri 2008-01-18 01:27:06, H. Peter Anvin wrote:
quoted text> Kyle McMartin wrote:
> >On Fri, Jan 18, 2008 at 06:53:53AM +0100, Andi Kleen 
> >wrote:
> >>One problem that we had in the past is that some 
> >>simulators
> >>only implement the absolutely minimum feature set and 
> >>you
> >>might have well broken one of these with this.
> >
> >Yeah, true. Please ignore the patch folks.
> >
> >cheers,	Kyle
> 
> 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.

simics? It was very useful long time ago...
							Pavel
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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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)


linux-kernel:
Artem Bityutskiy	[PATCH 12/44 take 2] [UBI] allocation unit implementation
Greg Kroah-Hartman	[PATCH 001/196] Chinese: Add the known_regression URI to the HOWTO
Jeff Garzik	Re: [RFC] Heads up on sys_fallocate()
Christoph Hellwig	pcmcia ioctl removal
git:

openbsd-misc:

linux-netdev:
Gerrit Renker	[PATCH 27/37] dccp: Integration of dynamic feature activation - part 2 (server side)
David Miller	[GIT]: Networking
David Miller	Re: [BUG] New Kernel Bugs
Jarek Poplawski	[PATCH] pkt_sched: Destroy gen estimators under rtnl_lock().

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

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