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

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.


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