[PATCH 029/128] KVM: selftests: Add vm_create_*() variants to expose/return 'struct vcpu'

Sean Christopherson
2022-05-04T22:51:20Z

Add VM creation helpers to expose/return 'struct vcpu' so that tests
don't have to hardcode a VCPU_ID or make assumptions about what vCPU ID
is used by the framework just to retrieve a vCPU the test created.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
.../selftests/kvm/include/kvm_util_base.h | 16 ++++++++++++++++
tools/testing/selftests/kvm/lib/kvm_util.c | 18 ++++++++++++++++++
2 files changed, 34 insertions(+)

diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
index 5d06d384bf10..07c453428e06 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -627,6 +627,22 @@ struct kvm_vm *vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus,
/* Create a default VM without any vcpus. */
struct kvm_vm *vm_create_without_vcpus(enum vm_guest_mode mode, uint64_t pages);

+/*
+ * Create a VM with a single vCPU with reasonable defaults and @extra_mem_pages
+ * additional pages of guest memory. Returns the VM and vCPU (via out param).
+ */
+struct kvm_vm *__vm_create_with_one_vcpu(struct vcpu **vcpu,
+ uint64_t extra_mem_pages,
+ void *guest_code);
+
+static inline struct kvm_vm *vm_create_with_one_vcpu(struct vcpu **vcpu,
+ void *guest_code)
+{
+ return __vm_create_with_one_vcpu(vcpu, 0, guest_code);
+}
+
+struct vcpu *vm_recreate_with_one_vcpu(struct kvm_vm *vm);
+
/*
* Adds a vCPU with reasonable defaults (e.g. a stack)
*
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 937e1b80a420..bf14574288e7 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -373,6 +373,16 @@ struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_pages,
(uint32_t []){ vcpuid });
}

+struct kvm_vm *__vm_create_with_one_vcpu(struct vcpu **vcpu,
+ uint64_t extra_mem_pages,
+ void *guest_code)
+{
+ struct kvm_vm *vm = vm_create_default(0, extra_mem_pages, guest_code);
+
+ *vcpu = vcpu_get(vm, 0);
+ return vm;
+}
+
/*
* VM Restart
*
@@ -407,6 +417,14 @@ void kvm_vm_restart(struct kvm_vm *vmp)
}
}

+struct vcpu *vm_recreate_with_one_vcpu(struct kvm_vm *vm)
+{
+ kvm_vm_restart(vm);
+
+ vm_vcpu_add(vm, 0);
+ return vcpu_get(vm, 0);
+}
+
/*
* Userspace Memory Region Find
*
--
2.36.0.464.gb9c8b46e94-goog