| // 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 @init1, and then |
| * add another vCPU, and run KVM_ARM_VCPU_INIT with @init2. |
| */ |
| static int add_init_2vcpus(struct kvm_vcpu_init *init1, |
| struct kvm_vcpu_init *init2) |
| { |
| struct kvm_vm *vm; |
| int ret; |
| |
| vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES, O_RDWR); |
| |
| vm_vcpu_add(vm, 0); |
| ret = _vcpu_ioctl(vm, 0, KVM_ARM_VCPU_INIT, init1); |
| if (ret) |
| goto free_exit; |
| |
| vm_vcpu_add(vm, 1); |
| ret = _vcpu_ioctl(vm, 1, KVM_ARM_VCPU_INIT, init2); |
| |
| free_exit: |
| kvm_vm_free(vm); |
| return ret; |
| } |
| |
| /* |
| * Add two vCPUs, then run KVM_ARM_VCPU_INIT for one vCPU with @init1, |
| * and run KVM_ARM_VCPU_INIT for another vCPU with @init2. |
| */ |
| static int add_2vcpus_init_2vcpus(struct kvm_vcpu_init *init1, |
| struct kvm_vcpu_init *init2) |
| { |
| struct kvm_vm *vm; |
| int ret; |
| |
| vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES, O_RDWR); |
| |
| vm_vcpu_add(vm, 0); |
| vm_vcpu_add(vm, 1); |
| |
| ret = _vcpu_ioctl(vm, 0, KVM_ARM_VCPU_INIT, init1); |
| if (ret) |
| goto free_exit; |
| |
| ret = _vcpu_ioctl(vm, 1, KVM_ARM_VCPU_INIT, init2); |
| |
| 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 init1, init2; |
| struct kvm_vm *vm; |
| int ret; |
| |
| if (!kvm_check_cap(KVM_CAP_ARM_EL1_32BIT)) { |
| print_skip("KVM_CAP_ARM_EL1_32BIT is not supported"); |
| exit(KSFT_SKIP); |
| } |
| |
| /* Get the preferred target type and copy that to init2 for later use */ |
| vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES, O_RDWR); |
| vm_ioctl(vm, KVM_ARM_PREFERRED_TARGET, &init1); |
| kvm_vm_free(vm); |
| init2 = init1; |
| |
| /* Test with 64bit vCPUs */ |
| ret = add_init_2vcpus(&init1, &init1); |
| TEST_ASSERT(ret == 0, |
| "Configuring 64bit EL1 vCPUs failed unexpectedly"); |
| ret = add_2vcpus_init_2vcpus(&init1, &init1); |
| TEST_ASSERT(ret == 0, |
| "Configuring 64bit EL1 vCPUs failed unexpectedly"); |
| |
| /* Test with 32bit vCPUs */ |
| init1.features[0] = (1 << KVM_ARM_VCPU_EL1_32BIT); |
| ret = add_init_2vcpus(&init1, &init1); |
| TEST_ASSERT(ret == 0, |
| "Configuring 32bit EL1 vCPUs failed unexpectedly"); |
| ret = add_2vcpus_init_2vcpus(&init1, &init1); |
| TEST_ASSERT(ret == 0, |
| "Configuring 32bit EL1 vCPUs failed unexpectedly"); |
| |
| /* Test with mixed-width vCPUs */ |
| init1.features[0] = 0; |
| init2.features[0] = (1 << KVM_ARM_VCPU_EL1_32BIT); |
| ret = add_init_2vcpus(&init1, &init2); |
| TEST_ASSERT(ret != 0, |
| "Configuring mixed-width vCPUs worked unexpectedly"); |
| ret = add_2vcpus_init_2vcpus(&init1, &init2); |
| TEST_ASSERT(ret != 0, |
| "Configuring mixed-width vCPUs worked unexpectedly"); |
| |
| return 0; |
| } |