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SubjectRe: [PATCH v7 10/12] KVM: selftests: aarch64: Introduce vpmu_counter_access test
On Mon, 9 Oct 2023, Raghavendra Rao Ananta wrote:
> +/* Create a VM that has one vCPU with PMUv3 configured. */
> +static void create_vpmu_vm(void *guest_code)
> +{
> + struct kvm_vcpu_init init;
> + uint8_t pmuver, ec;
> + uint64_t dfr0, irq = 23;
> + struct kvm_device_attr irq_attr = {
> + .group = KVM_ARM_VCPU_PMU_V3_CTRL,
> + .attr = KVM_ARM_VCPU_PMU_V3_IRQ,
> + .addr = (uint64_t)&irq,
> + };
> + struct kvm_device_attr init_attr = {
> + .group = KVM_ARM_VCPU_PMU_V3_CTRL,
> + .attr = KVM_ARM_VCPU_PMU_V3_INIT,
> + };
> +
> + /* The test creates the vpmu_vm multiple times. Ensure a clean state */
> + memset(&vpmu_vm, 0, sizeof(vpmu_vm));
> +
> + vpmu_vm.vm = vm_create(1);
> + vm_init_descriptor_tables(vpmu_vm.vm);
> + for (ec = 0; ec < ESR_EC_NUM; ec++) {
> + vm_install_sync_handler(vpmu_vm.vm, VECTOR_SYNC_CURRENT, ec,
> + guest_sync_handler);
> + }
> +
> + /* Create vCPU with PMUv3 */
> + vm_ioctl(vpmu_vm.vm, KVM_ARM_PREFERRED_TARGET, &init);
> + init.features[0] |= (1 << KVM_ARM_VCPU_PMU_V3);
> + vpmu_vm.vcpu = aarch64_vcpu_add(vpmu_vm.vm, 0, &init, guest_code);
> + vcpu_init_descriptor_tables(vpmu_vm.vcpu);
> + vpmu_vm.gic_fd = vgic_v3_setup(vpmu_vm.vm, 1, 64,
> + GICD_BASE_GPA, GICR_BASE_GPA);
> +
> + /* Make sure that PMUv3 support is indicated in the ID register */
> + vcpu_get_reg(vpmu_vm.vcpu,
> + KVM_ARM64_SYS_REG(SYS_ID_AA64DFR0_EL1), &dfr0);
> + pmuver = FIELD_GET(ARM64_FEATURE_MASK(ID_AA64DFR0_PMUVER), dfr0);
> + TEST_ASSERT(pmuver != ID_AA64DFR0_PMUVER_IMP_DEF &&
> + pmuver >= ID_AA64DFR0_PMUVER_8_0,
> + "Unexpected PMUVER (0x%x) on the vCPU with PMUv3", pmuver);
> +
> + /* Initialize vPMU */
> + vcpu_ioctl(vpmu_vm.vcpu, KVM_SET_DEVICE_ATTR, &irq_attr);
> + vcpu_ioctl(vpmu_vm.vcpu, KVM_SET_DEVICE_ATTR, &init_attr);
> +}

This one fails to build for me:
aarch64/vpmu_counter_access.c: In function ‘create_vpmu_vm’:
aarch64/vpmu_counter_access.c:456:47: error: ‘ID_AA64DFR0_PMUVER_MASK’ undeclared (first use in this function); did you mean ‘ID_AA64DFR0_EL1_PMUVer_MASK’?
456 | pmuver = FIELD_GET(ARM64_FEATURE_MASK(ID_AA64DFR0_PMUVER), dfr0);

Regards,
Sebastian
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