Re: [PATCH v13 25/35] KVM: selftests: Convert lib's mem regions to KVM_SET_USER_MEMORY_REGION2

[Dan Carpenter]

On Fri, Oct 27, 2023 at 11:22:07AM -0700, Sean Christopherson wrote:
> Use KVM_SET_USER_MEMORY_REGION2 throughout KVM's selftests library so that
> support for guest private memory can be added without needing an entirely
> separate set of helpers.
> 
> Note, this obviously makes selftests backwards-incompatible with older KVM
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> versions from this point forward.
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Is there a way we could disable the tests on older kernels instead of
making them fail?  Check uname or something?  There is probably a
standard way to do this...  It's these tests which fail.

 kvm_aarch32_id_regs
 kvm_access_tracking_perf_test
 kvm_arch_timer
 kvm_debug-exceptions
 kvm_demand_paging_test
 kvm_dirty_log_perf_test
 kvm_dirty_log_test
 kvm_guest_print_test
 kvm_hypercalls
 kvm_kvm_page_table_test
 kvm_memslot_modification_stress_test
 kvm_memslot_perf_test
 kvm_page_fault_test
 kvm_psci_test
 kvm_rseq_test
 kvm_smccc_filter
 kvm_steal_time
 kvm_vgic_init
 kvm_vgic_irq
 kvm_vpmu_counter_access

regards,
dan carpenter