Regression problem with commit 5045b46803

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Commit 5045b46803 added a check that cs.dpl equals cs.rpl during
task-switch. Unfortunately, is causes some of my tests that run well on
bare-metal to fail.

Although this check is mentioned in table 7-1 of the SDM as causing a
#TSS exception, it is not mentioned in table 6-6 that lists "invalid TSS
conditions" which cause #TSS exceptions.

Thus, I recommend on reverting commit 5045b46803, or alternatively
rechecking task-switch behavior on bare-metal.

Nadav
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