Merge tag 'kvm-x86-selftests-7.4' of https://github.com/kvm-x86/linux into HEAD

KVM selftests changes and a few KVM x86 fixes for 7.4

 - Fix emulation of VMPTRST and VMPTRLD when eVMCS is in-use to match real
   Hyper-V's behavior.

 - Saturate L2's TSC frequency if stacking L1 and L2 scaling multipliers
   exceeds what hardware supports, as attempting to run L2 with an illegal
   multiplier will either cause VM-Entry to fail (VMX) or trigger a #GP when
   writing MSR_AMD64_TSC_RATIO (SVM).  The #GP is thankfully benign in the
   grand scheme as even "unsafe" WRMSRs have exception fixup.

 - Rework KVM selftest's handling of memory regions so that PPC can force its
   page table allocations to be naturally aligned.

 - Clean up selftest's VMX instruction helpers, and drop an absurd number of
   completely useless return values, e.g. functions that unconditionally
   return %true and then have every caller assert success.

 - Add selftests support for Zhaoxin CPUs.

 - Overhaul the TSC scaling test to add a regression test for the saturation
   behavior, and to increase its coverage in general.

 - Fix selftests usage various NUMA syscalls to account for an undocumented,
   but known since 2007, off-by-one kernel bug.  Add helpers to try and avoid
   re-introducing the same flaws in the future.

 - Automatically run xAPIC IPI migration test (between NUMA nodes) when
   possible, as the entire point of the test is verify KVM's handling of page
   migration of the APIC backing page.

 - Misc cleanups.

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