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

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

KVM SVM changes for 6.19:

 - Fix a few missing "VMCB dirty" bugs.

 - Fix the worst of KVM's lack of EFER.LMSLE emulation.

 - Add AVIC support for addressing 4k vCPUs in x2AVIC mode.

 - Fix incorrect handling of selective CR0 writes when checking intercepts
   during emulation of L2 instructions.

 - Fix a currently-benign bug where KVM would clobber SPEC_CTRL[63:32] on
   VMRUN and #VMEXIT.

 - Fix a bug where KVM corrupt the guest code stream when re-injecting a soft
   interrupt if the guest patched the underlying code after the VM-Exit, e.g.
   when Linux patches code with a temporary INT3.

 - Add KVM_X86_SNP_POLICY_BITS to advertise supported SNP policy bits to
   userspace, and extend KVM "support" to all policy bits that don't require
   any actual support from KVM.