Merge tag 'kvm-x86-misc-7.2' of https://github.com/kvm-x86/linux into HEAD

KVM misc x86 changes for 7.2

 - Handle EXIT_FASTPATH_EXIT_USERSPACE in vendor code to ensure vendor code
   gets a chance to handle things like reaping the PML buffer.

 - Ensure KVM's copy of CR0 and CR3 are up-to-date on SVM prior to invoking
   fastpath handlers.

 - Update KVM's view of PV async enabling if and only if the MSR write fully
   succeeds.

 - Fix a variety of issues where the emulator doesn't honor guest-debug state,
   and clean up related code along the way.

 - Synthesize EPT Violation and #NPF "error code" bits when injecting faults
   into L1 that didn't originate in hardware (in which case the VMCS/VMCB
   doesn't hold relevant information).

 - Add support for virtualizing (well, emulating) AMD's flavor of CPL>0 CPUID
   faulting.

 - Clean up the GPR APIs so that KVM's use of "raw" is consistent, and fix a
   variety of minor bugs along the way.

 - Fix an OOB memory access due to not checking the VP ID when handling a
   Hyper-V PV TLB flush for L2.

 - Fix a bug in the mediated PMU's handling of fixed counters that allowed the
   guest to bypass the PMU event filter.

 - Allow userspace to return EAGAIN when handling SNP and TDX hypercalls, so
   the KVM can forward a "retry" status code to the guest, and reserve all
   unused error codes for future usage.

 - Misc fixes and cleanups.

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