i386 - msr support for xen

i386 - msr support for xen

[Bastian Blank]

Hi folks

The speedstep modules uses MSR to do its work. XEN can't allow this and
the calls needs to be done via a hypercall into xen.

I only found a hacky patch in
http://article.gmane.org/gmane.comp.emulators.xen.devel/22282, which
converts one of the speedstep modules to use xen. Does someone know if
there is another solution raising?

Bastian

-- 
	"Beauty is transitory."
	"Beauty survives."
		-- Spock and Kirk, "That Which Survives", stardate unknown

Re: i386 - msr support for xen

[Matt T. Yourst]

Bastian Blank wrote:
> Hi folks
>
>The speedstep modules uses MSR to do its work. XEN can't allow this and
>the calls needs to be done via a hypercall into xen.
>
>I only found a hacky patch in
>http://article.gmane.org/gmane.comp.emulators.xen.devel/22282, which
>converts one of the speedstep modules to use xen. Does someone know if
>there is another solution raising?
>

I submitted a better patch to xen-devel that removes the need to modify any 
cpufreq modules - it directly traps the MSR writes and updates Xen's internal 
timers, something the patch above did not do correctly.

Please ignore the previous patch and update to the latest devel version of 
Xen, which should be incorporating the updated code in the next few days.

- Matt Yourst

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 Matt T. Yourst               yourst@cs.binghamton.edu
 Binghamton University, Department of Computer Science
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