[GIT PULL] KVM: x86 pull requests for 6.20

[Sean Christopherson]

Unless I'm forgetting something, there's only one conflict, between "selftests"
and the kvm-riscv tree[*] (Anup also mentioned this in his pull request).

There are two ABI changes, both of which I'm confident won't break userspace:

 - When populating guest_memfd, require the source to be 4KiB aligned.
 - Disallow changing the virtual CPU model when L2 is active (basically an
   extension of the existing rule that the model can't be changed after KVM_RUN.

Oh, and except for the PMU pull request, these are all against 6.19-rc4.

[*] https://lore.kernel.org/all/aXt2F2jIm5YK8LB1@xxxxxxxxxxxxx