The Zen+ CI runner doesn't support the UMIP hardware feature, so it
doesn't hit the kernel emulated path.
Instead the instruction returns real data on this hardware. Still in
kernel space, so it is unmapped as expected.
For these unit tests we no longer need to put them in the disabled tests
file. Instead it will be skipped if the host doesn't support the feature
required.
Just noticed this while casually reading the x86 architecture manuals.
The move segment registers instructions ignore the REX.R prefix on the
segment register.
Previously this was expected to create an invalid register selection.
A little bit silly but sure, support it.
First test just ensures that an aligned cacheline clear will clear out
the data.
Second test ensures an unaligned address will still only clear the
cacheline the address lies in without touching the other surrounding
cachelines.
Disabled on the host runner since the CI host runner doesn't support the
instruction
Disables the thunking unit test on host because obviously it won't work
there
Also disables the SSE4a unit tests on host because Intel doesn't support
SSE4a and technically neither does FEX
