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2006 Jun 14
8
WP flag in CR0, setting
Hello!
I have a slight problem in my guest port with the WP bit in CR0. The
original kernel maps certain kernel pages to user-mode read-only and
relies on the kernel being able to modify these despite the read-only
bit being set in the pages. This in turn requires that the WP bit is
unset in CR0.
Unfortunately, Xen doesn''t allow the WP bit to be zeroed because Xen
wants to share pages