Merge tag 'kvm-x86-selftests-6.19' of https://github.com/kvm-x86/linux into HEAD

KVM selftests changes for 6.19:

 - Fix a math goof in mmu_stress_test when running on a single-CPU system/VM.

 - Forcefully override ARCH from x86_64 to x86 to play nice with specifying
   ARCH=x86_64 on the command line.

 - Extend a bunch of nested VMX to validate nested SVM as well.

 - Add support for LA57 in the core VM_MODE_xxx macro, and add a test to
   verify KVM can save/restore nested VMX state when L1 is using 5-level
   paging, but L2 is not.

 - Clean up the guest paging code in anticipation of sharing the core logic for
   nested EPT and nested NPT.

diff --cc tools/testing/selftests/kvm/include/kvm_util.h
Simple merge

diff --cc tools/testing/selftests/kvm/lib/kvm_util.c
Simple merge