// 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.
*/
/* * Add a vCPU, run KVM_ARM_VCPU_INIT with @init0, and then * add another vCPU, and run KVM_ARM_VCPU_INIT with @init1.
*/ staticint 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.
*/ staticint 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;
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");
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