SIG-CLOUD-9: X86/KASLR fixes for HMM utilized by CUDA + temp fixes/workaround for HMM kselftest#4

PlaidCat merged 2 commits intosig-cloud-9/5.14.0-427.40.1.el9_4ctrliq/kernel-src-tree:sig-cloud-9/5.14.0-427.40.1.el9_4from

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