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