Commit d9c41dc5 authored by Sean Christopherson's avatar Sean Christopherson Committed by Paolo Bonzini
Browse files

KVM: selftests: Verify that KVM returns the configured APIC cycle length 



Add checks in the APIC bus clock test to verify that querying
KVM_CAP_X86_APIC_BUS_CYCLES_NS on the VM after changing the frequency
returns the VM's actual APIC cycle length, not KVM's default.  For
giggles, verify that KVM still returns its default frequency for the
system-scoped check.

Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
Message-ID: <20260522173526.3539407-3-seanjc@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 86e2de10

tools/testing/selftests/kvm/x86/apic_bus_clock_test.c

+4 −0
Original line number Diff line number Diff line
@@ -137,6 +137,10 @@ static void run_apic_bus_clock_test(u64 apic_hz, u64 delay_ms, 
	vm_enable_cap(vm, KVM_CAP_X86_APIC_BUS_CYCLES_NS,

		      NSEC_PER_SEC / apic_hz);



	TEST_ASSERT_EQ(kvm_check_cap(KVM_CAP_X86_APIC_BUS_CYCLES_NS), 1);

	TEST_ASSERT_EQ(vm_check_cap(vm, KVM_CAP_X86_APIC_BUS_CYCLES_NS),

		       NSEC_PER_SEC / apic_hz);



	vcpu = vm_vcpu_add(vm, 0, apic_guest_code);

	vcpu_args_set(vcpu, 2, apic_hz, delay_ms);