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Re: [Xen-devel] disabling of X86_CR4_DE

On 9 Jan 2006, at 16:06, Jan Beulich wrote:

Is there a particular reason for doing this unconditionally on both 32-
and 64-bits in xenolinux? It would seem to me that this feature should
be disabled at most in unprivileged kernels... Thanks, Jan

How do you mean? Looking at xen-unstable, we clear CR4_DE at the same point as native linux (i.e., we haven't changed code relating to that control flag at all).

It's not a debug-feature-enable flag anyway -- more a backwards-compatibility flag for accesses to defunct debug registers dr4 and dr5. It's pretty unimportant.

 -- Keir

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