Sean Christopherson b223649576 KVM: x86: Mark x2APIC DFR reg as non-existent for x2APIC
Mark APIC_DFR as being invalid/non-existent in x2APIC mode instead of
handling it as a one-off check in kvm_x2apic_msr_read().  This will allow
reusing "valid_reg_mask" to generate VMX's interception bitmaps for
x2APIC.  Handling DFR in the common read path may also fix the Hyper-V
PV MSR interface, if that can coexist with x2APIC.

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Link: https://lore.kernel.org/r/20230107011025.565472-4-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
2023-01-24 10:04:35 -08:00
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