Xen devel - Jul 2007 - [PATCH] Fix incorrect usage on clear_in_cr4

Introduce set/clear_cr4 to modify local CR4, since *_in_cr4
version has side effect on global feature cache - mmu_cr4_features.

For example, VMX feature disable is only local to current CPU.
Another fix is to __pge_off/on which blindly copy mmu_cr4_features.

Signed-off-by Kevin Tian <kevin.tian@intel.com>

Thanks,
Kevin


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Previous one failed to apply on latest tip. Please use this updated 
One instead. Sorry for that.

Thanks,
Kevin
>-----Original Message-----
>From: xen-devel-bounces@lists.xensource.com
>[mailto:xen-devel-bounces@lists.xensource.com] On Behalf Of Tian,
>Kevin
>Sent: 2007年7月12日 13:52
>To: xen-devel@lists.xensource.com
>Subject: [Xen-devel] [PATCH] Fix incorrect usage on clear_in_cr4
>
>Introduce set/clear_cr4 to modify local CR4, since *_in_cr4
>version has side effect on global feature cache - mmu_cr4_features.
>
>For example, VMX feature disable is only local to current CPU.
>Another fix is to __pge_off/on which blindly copy mmu_cr4_features.
>
>Signed-off-by Kevin Tian <kevin.tian@intel.com>
>
>Thanks,
>Kevin

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