diff options
Diffstat (limited to 'tools/testing/selftests/kvm/aarch64/vcpu_width_config.c')
-rw-r--r-- | tools/testing/selftests/kvm/aarch64/vcpu_width_config.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/aarch64/vcpu_width_config.c b/tools/testing/selftests/kvm/aarch64/vcpu_width_config.c new file mode 100644 index 0000000000..80b74c6f15 --- /dev/null +++ b/tools/testing/selftests/kvm/aarch64/vcpu_width_config.c @@ -0,0 +1,121 @@ +// 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; +} |