RE: [Xen-devel] Re: Reproducable data corruption on xen-unstable

[Robin Green <greenrd@xxxxxxxxxxxxx>]

On Mon, 7 Feb 2005, Ian Pratt wrote:
> > A few minutes ago, I wrote:
> > Aha! Shouldn't the stts macro in xeno-linux be calling
> > __HYPERVISOR_fpu_taskswitch instead of trying to write to CR0 itself?
> > Writing to CR0 directly is impossible in ring 1, isn't it?
> Please can you try the unstable tree: it has an extended instruction
> emulator that was introduced to avoid some the code edits that some
> people on the linux-kernel list were complaining about.
Ah, sorry, I'm already using the unstable tree, but I'd forgotten about 
the emulation. So, never mind - it's not the use of mov _, cr0 in ring 1 
that's the problem; it must be something else. Disregard that post.
--
Robin



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