// SPDX-License-Identifier: GPL-2.0-only /* * vcpu_width_config - Test KVM_ARM_VCPU_INIT() with KVM_ARM_VCPU_EL1_32BIT. * * Copyright (c) 2022 Google LLC. * * This is a test that ensures that non-mixed-width vCPUs (all 64bit vCPUs * or all 32bit vcPUs) can be configured and mixed-width vCPUs cannot be * configured. */ #include "kvm_util.h" #include "processor.h" #include "test_util.h" /* * Add a vCPU, run KVM_ARM_VCPU_INIT with @init0, and then * add another vCPU, and run KVM_ARM_VCPU_INIT with @init1. */ static int add_init_2vcpus(struct kvm_vcpu_init *init0, struct kvm_vcpu_init *init1) { struct kvm_vcpu *vcpu0, *vcpu1; struct kvm_vm *vm; int ret; vm = vm_create_barebones(); vcpu0 = __vm_vcpu_add(vm, 0); ret = __vcpu_ioctl(vcpu0, KVM_ARM_VCPU_INIT, init0); if (ret) goto free_exit; vcpu1 = __vm_vcpu_add(vm, 1); ret = __vcpu_ioctl(vcpu1, KVM_ARM_VCPU_INIT, init1); free_exit: kvm_vm_free(vm); return ret; } /* * Add two vCPUs, then run KVM_ARM_VCPU_INIT for one vCPU with @init0, * and run KVM_ARM_VCPU_INIT for another vCPU with @init1. */ static int add_2vcpus_init_2vcpus(struct kvm_vcpu_init *init0, struct kvm_vcpu_init *init1) { struct kvm_vcpu *vcpu0, *vcpu1; struct kvm_vm *vm; int ret; vm = vm_create_barebones(); vcpu0 = __vm_vcpu_add(vm, 0); vcpu1 = __vm_vcpu_add(vm, 1); ret = __vcpu_ioctl(vcpu0, KVM_ARM_VCPU_INIT, init0); if (ret) goto free_exit; ret = __vcpu_ioctl(vcpu1, KVM_ARM_VCPU_INIT, init1); free_exit: kvm_vm_free(vm); return ret; } /* * Tests that two 64bit vCPUs can be configured, two 32bit vCPUs can be * configured, and two mixed-width vCPUs cannot be configured. * Each of those three cases, configure vCPUs in two different orders. * The one is running KVM_CREATE_VCPU for 2 vCPUs, and then running * KVM_ARM_VCPU_INIT for them. * The other is running KVM_CREATE_VCPU and KVM_ARM_VCPU_INIT for a vCPU, * and then run those commands for another vCPU. */ int main(void) { struct kvm_vcpu_init init0, init1; struct kvm_vm *vm; int ret; TEST_REQUIRE(kvm_has_cap(KVM_CAP_ARM_EL1_32BIT)); /* Get the preferred target type and copy that to init1 for later use */ vm = vm_create_barebones(); vm_ioctl(vm, KVM_ARM_PREFERRED_TARGET, &init0); kvm_vm_free(vm); init1 = init0; /* Test with 64bit vCPUs */ ret = add_init_2vcpus(&init0, &init0); TEST_ASSERT(ret == 0, "Configuring 64bit EL1 vCPUs failed unexpectedly"); ret = add_2vcpus_init_2vcpus(&init0, &init0); TEST_ASSERT(ret == 0, "Configuring 64bit EL1 vCPUs failed unexpectedly"); /* Test with 32bit vCPUs */ init0.features[0] = (1 << KVM_ARM_VCPU_EL1_32BIT); ret = add_init_2vcpus(&init0, &init0); TEST_ASSERT(ret == 0, "Configuring 32bit EL1 vCPUs failed unexpectedly"); ret = add_2vcpus_init_2vcpus(&init0, &init0); TEST_ASSERT(ret == 0, "Configuring 32bit EL1 vCPUs failed unexpectedly"); /* Test with mixed-width vCPUs */ init0.features[0] = 0; init1.features[0] = (1 << KVM_ARM_VCPU_EL1_32BIT); ret = add_init_2vcpus(&init0, &init1); TEST_ASSERT(ret != 0, "Configuring mixed-width vCPUs worked unexpectedly"); ret = add_2vcpus_init_2vcpus(&init0, &init1); TEST_ASSERT(ret != 0, "Configuring mixed-width vCPUs worked unexpectedly"); return 0; }