Implementation of the unpinned APIC page didn't update the VMCS address
cache when invalidation was done through range mmu notifiers.
This became a problem when the page notifier was removed.
Re-introduce the arch-specific helper and call it from ...range_start.
Reported-by: Fabian Grünbichler <email@example.com>
Fixes: 38b99173 ("kvm: vmx: Implement set_apic_access_page_addr")
Fixes: 369ea824 ("mm/rmap: update to new mmu_notifier semantic v2")
Reviewed-by: Paolo Bonzini <firstname.lastname@example.org>
Reviewed-by: Andrea Arcangeli <email@example.com>
Tested-by: Wanpeng Li <firstname.lastname@example.org>
Tested-by: Fabian Grünbichler <email@example.com>
Signed-off-by: Radim Krčmář <firstname.lastname@example.org>