Additional KVM patches has been merged (post 5.3-rc8):
e69e72faa3a KVM: x86: Add support for user wait instructions 6e3ba4abcea KVM: vmx: Emulate MSR IA32_UMWAIT_CONTROL bf653b78f96 KVM: vmx: Introduce handle_unexpected_vmexit and handle WAITPKG vmexit
[There's no Xen AIA work (yet)]
Additional KVM patches has been merged (post 5.3-rc8):
e69e72faa3a KVM: x86: Add support for user wait instructions unexpected_ vmexit and handle WAITPKG vmexit
6e3ba4abcea KVM: vmx: Emulate MSR IA32_UMWAIT_CONTROL
bf653b78f96 KVM: vmx: Introduce handle_
[There's no Xen AIA work (yet)]