Charles Jacobsen authored Jan 21, 2015 and Vikram Narayanan committed Oct 25, 2016

Was getting bad load/store msr addresses for vm exits.
Properly detected by the lcd_arch_check code.

In struct lcd_arch, the msr_autoload fields were not
word aligned in some instances (see requirement
in Intel SDM V3 26.2.1.2). Even with compiler align
attributes, if we use kmalloc, proper alignment is
not guaranteed - we can allocate a struct lcd_arch
on the wrong byte and it throws off the alignment
of the entire struct.

kmem cache allows specifying alignment. Appears to be
working correctly.