On 09/10/19 02:41, Aaron Lewis wrote: > * Set value of MSR for VCPU. > */ > -void vcpu_set_msr(struct kvm_vm *vm, uint32_t vcpuid, uint64_t msr_index, > - uint64_t msr_value) > +void vcpu_set_msr_expect_result(struct kvm_vm *vm, uint32_t vcpuid, > + uint64_t msr_index, uint64_t msr_value, > + int result) > { > struct vcpu *vcpu = vcpu_find(vm, vcpuid); > struct { > @@ -899,10 +901,30 @@ void vcpu_set_msr(struct kvm_vm *vm, uint32_t vcpuid, uint64_t msr_index, > buffer.entry.index = msr_index; > buffer.entry.data = msr_value; > r = ioctl(vcpu->fd, KVM_SET_MSRS, &buffer.header); > - TEST_ASSERT(r == 1, "KVM_SET_MSRS IOCTL failed,\n" > + TEST_ASSERT(r == result, "KVM_SET_MSRS IOCTL failed,\n" > " rc: %i errno: %i", r, errno); > } This is a library, so the functions to some extent should make sense even outside tests. Please make a function _vcpu_set_msr that returns the result of the ioctl; it can still be used in vcpu_set_msr, and the tests can TEST_ASSERT what they want. > +uint32_t kvm_get_cpuid_max_basic(void) > +{ > + return kvm_get_supported_cpuid_entry(0)->eax; > +} > + > +uint32_t kvm_get_cpuid_max_extended(void) I would leave the existing function aside, and call this one kvm_get_cpuid_max_amd() since CPUID leaves at 0x80000000 are allocated by AMD. Otherwise looks good. Paolo