Messages in this thread | | | Date | Fri, 11 Jan 2008 18:16:59 +0000 | From | Pavel Machek <> | Subject | Re: [PATCH] x86: make clflush a required feature on x86_64 |
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On Fri 2008-01-18 01:27:06, H. Peter Anvin wrote: > 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 -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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