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67730e6c53
Use the kernel's canonical $(ARCH) paths instead of the raw target triple for KVM selftests directories. KVM selftests are quite nearly the only place in the entire kernel that using the target triple for directories, tools/testing/selftests/drivers/s390x being the lone holdout. Using the kernel's preferred nomenclature eliminates the minor, but annoying, friction of having to translate to KVM's selftests directories, e.g. for pattern matching, opening files, running selftests, etc. Opportunsitically delete file comments that reference the full path of the file, as they are obviously prone to becoming stale, and serve no known purpose. Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Acked-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Acked-by: Andrew Jones <ajones@ventanamicro.com> Link: https://lore.kernel.org/r/20241128005547.4077116-16-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>
121 lines
3.2 KiB
C
121 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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