KVM: selftests: Make vm_create() a wrapper that specifies VM_MODE_DEFAULT

Add ____vm_create() to be the innermost helper, and turn vm_create() into
a wrapper the specifies VM_MODE_DEFAULT.  Most of the vm_create() callers
just want the default mode, or more accurately, don't care about the mode.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

tools/testing/selftests/kvm/aarch64/psci_test.c

@@ -78,7 +78,7 @@ static struct kvm_vm *setup_vm(void *guest_code)
 	struct kvm_vcpu_init init;
 	struct kvm_vm *vm;
 
-	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES);
+	vm = vm_create(DEFAULT_GUEST_PHY_PAGES);
 	ucall_init(vm, NULL);
 
 	vm_ioctl(vm, KVM_ARM_PREFERRED_TARGET, &init);

tools/testing/selftests/kvm/dirty_log_test.c

@@ -674,7 +674,7 @@ static struct kvm_vm *create_vm(enum vm_guest_mode mode, uint32_t vcpuid,
 
 	pr_info("Testing guest mode: %s\n", vm_guest_mode_string(mode));
 
-	vm = vm_create(mode, DEFAULT_GUEST_PHY_PAGES + extra_pg_pages);
+	vm = __vm_create(mode, DEFAULT_GUEST_PHY_PAGES + extra_pg_pages);
 
 	log_mode_create_vm_done(vm);
 	vm_vcpu_add_default(vm, vcpuid, guest_code);

tools/testing/selftests/kvm/hardware_disable_test.c

@@ -104,7 +104,7 @@ static void run_test(uint32_t run)
 	for (i = 0; i < VCPU_NUM; i++)
 		CPU_SET(i, &cpu_set);
 
-	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES);
+	vm = vm_create(DEFAULT_GUEST_PHY_PAGES);
 
 	pr_debug("%s: [%d] start vcpus\n", __func__, run);
 	for (i = 0; i < VCPU_NUM; ++i) {

tools/testing/selftests/kvm/include/kvm_util_base.h

@@ -247,7 +247,6 @@ static inline void vm_enable_cap(struct kvm_vm *vm, uint32_t cap, uint64_t arg0)
 void vm_enable_dirty_ring(struct kvm_vm *vm, uint32_t ring_size);
 const char *vm_guest_mode_string(uint32_t i);
 
-struct kvm_vm *__vm_create(enum vm_guest_mode mode, uint64_t phy_pages);
 void kvm_vm_free(struct kvm_vm *vmp);
 void kvm_vm_restart(struct kvm_vm *vmp);
 void kvm_vm_release(struct kvm_vm *vmp);
@@ -595,9 +594,21 @@ vm_paddr_t vm_phy_pages_alloc(struct kvm_vm *vm, size_t num,
 			      vm_paddr_t paddr_min, uint32_t memslot);
 vm_paddr_t vm_alloc_page_table(struct kvm_vm *vm);
 
+/*
+ * ____vm_create() does KVM_CREATE_VM and little else.  __vm_create() also
+ * loads the test binary into guest memory and creates an IRQ chip (x86 only).
+ */
+struct kvm_vm *____vm_create(enum vm_guest_mode mode, uint64_t nr_pages);
+struct kvm_vm *__vm_create(enum vm_guest_mode mode, uint64_t nr_pages);
+
 static inline struct kvm_vm *vm_create_barebones(void)
 {
-	return __vm_create(VM_MODE_DEFAULT, 0);
+	return ____vm_create(VM_MODE_DEFAULT, 0);
+}
+
+static inline struct kvm_vm *vm_create(uint64_t nr_pages)
+{
+	return __vm_create(VM_MODE_DEFAULT, nr_pages);
 }
 
 /*
@@ -629,9 +640,6 @@ struct kvm_vm *vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus,
 				    uint32_t num_percpu_pages, void *guest_code,
 				    uint32_t vcpuids[]);
 
-/* Create a default VM without any vcpus. */
-struct kvm_vm *vm_create(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).

tools/testing/selftests/kvm/lib/kvm_util.c

@@ -149,12 +149,12 @@ const struct vm_guest_mode_params vm_guest_mode_params[] = {
 _Static_assert(sizeof(vm_guest_mode_params)/sizeof(struct vm_guest_mode_params) == NUM_VM_MODES,
 	       "Missing new mode params?");
 
-struct kvm_vm *__vm_create(enum vm_guest_mode mode, uint64_t phy_pages)
+struct kvm_vm *____vm_create(enum vm_guest_mode mode, uint64_t nr_pages)
 {
 	struct kvm_vm *vm;
 
 	pr_debug("%s: mode='%s' pages='%ld'\n", __func__,
-		 vm_guest_mode_string(mode), phy_pages);
+		 vm_guest_mode_string(mode), nr_pages);
 
 	vm = calloc(1, sizeof(*vm));
 	TEST_ASSERT(vm != NULL, "Insufficient Memory");
@@ -251,20 +251,20 @@ struct kvm_vm *__vm_create(enum vm_guest_mode mode, uint64_t phy_pages)
 
 	/* Allocate and setup memory for guest. */
 	vm->vpages_mapped = sparsebit_alloc();
-	if (phy_pages != 0)
+	if (nr_pages != 0)
 		vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS,
-					    0, 0, phy_pages, 0);
+					    0, 0, nr_pages, 0);
 
 	return vm;
 }
 
-struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t pages)
+struct kvm_vm *__vm_create(enum vm_guest_mode mode, uint64_t nr_pages)
 {
 	struct kvm_vm *vm;
 
-	pages = vm_adjust_num_guest_pages(mode, pages);
+	nr_pages = vm_adjust_num_guest_pages(mode, nr_pages);
 
-	vm = __vm_create(mode, pages);
+	vm = ____vm_create(mode, nr_pages);
 
 	kvm_vm_elf_load(vm, program_invocation_name);
 
@@ -323,7 +323,7 @@ struct kvm_vm *vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus,
 		    "nr_vcpus = %d too large for host, max-vcpus = %d",
 		    nr_vcpus, kvm_check_cap(KVM_CAP_MAX_VCPUS));
 
-	vm = vm_create(mode, pages);
+	vm = __vm_create(mode, pages);
 
 	for (i = 0; i < nr_vcpus; ++i) {
 		uint32_t vcpuid = vcpuids ? vcpuids[i] : i;

tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c

@@ -365,7 +365,7 @@ static void test_pmu_config_disable(void (*guest_code)(void))
 	if (!(r & KVM_PMU_CAP_DISABLE))
 		return;
 
-	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES);
+	vm = vm_create(DEFAULT_GUEST_PHY_PAGES);
 
 	vm_enable_cap(vm, KVM_CAP_PMU_CAPABILITY, KVM_PMU_CAP_DISABLE);
 

tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c

@@ -86,7 +86,7 @@ static struct kvm_vm *create_vm(void)
 	uint64_t extra_pg_pages = vcpu_pages / PTES_PER_MIN_PAGE * N_VCPU;
 	uint64_t pages = DEFAULT_GUEST_PHY_PAGES + vcpu_pages + extra_pg_pages;
 
-	return vm_create(VM_MODE_DEFAULT, pages);
+	return vm_create(pages);
 }
 
 static void add_x86_vcpu(struct kvm_vm *vm, uint32_t vcpuid, bool bsp_code)