neel 5df866f4b1 Increase the TSS limit by one byte. The processor requires an additional byte
with all bits set to 1 beyond the I/O permission bitmap.

Prior to this change accessing I/O ports [0xFFF8-0xFFFF] would trigger a
#GP fault even though the I/O bitmap allowed access to those ports.

For more details see section "I/O Permission Bit Map" in the Intel SDM, Vol 1.

Reviewed by:	kib
2014-05-14 22:24:09 +00:00
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2014-03-11 10:07:01 +00:00
2012-05-24 22:00:48 +00:00
2012-03-28 20:58:30 +00:00
2014-03-11 10:27:57 +00:00