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Re: [Xen-devel] disabling of X86_CR4_DE
| To: | "Jan Beulich" <JBeulich@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] disabling of X86_CR4_DE |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Mon, 9 Jan 2006 17:13:43 +0000 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Mon, 09 Jan 2006 17:13:51 +0000 |
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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 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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