kvm: selftests: aarch64: dirty_log_test: support greater than 40-bit IPAs

When KVM has KVM_CAP_ARM_VM_IPA_SIZE we can test with > 40-bit IPAs by
using the 'type' field of KVM_CREATE_VM.

Signed-off-by: Andrew Jones <[e-mail]>
Signed-off-by: Radim Krčmář <[e-mail]>

tools/testing/selftests/kvm/dirty_log_test.c

···
 }
 
 static struct kvm_vm *create_vm(enum vm_guest_mode mode, uint32_t vcpuid,
-				uint64_t extra_mem_pages, void *guest_code)
+				uint64_t extra_mem_pages, void *guest_code,
+				unsigned long type)
 {
 	struct kvm_vm *vm;
 	uint64_t extra_pg_pages = extra_mem_pages / 512 * 2;
 
-	vm = vm_create(mode, DEFAULT_GUEST_PHY_PAGES + extra_pg_pages, O_RDWR);
+	vm = _vm_create(mode, DEFAULT_GUEST_PHY_PAGES + extra_pg_pages,
+			O_RDWR, type);
 	kvm_vm_elf_load(vm, program_invocation_name, 0, 0);
 #ifdef __x86_64__
 	vm_create_irqchip(vm);
···
 	struct kvm_vm *vm;
 	uint64_t max_gfn;
 	unsigned long *bmap;
+	unsigned long type = 0;
 
 	switch (mode) {
 	case VM_MODE_P52V48_4K:
···
 		break;
 	case VM_MODE_P52V48_64K:
 		guest_pa_bits = 52;
+		guest_page_shift = 16;
+		break;
+	case VM_MODE_P48V48_4K:
+		guest_pa_bits = 48;
+		guest_page_shift = 12;
+		break;
+	case VM_MODE_P48V48_64K:
+		guest_pa_bits = 48;
 		guest_page_shift = 16;
 		break;
 	case VM_MODE_P40V48_4K:
···
 	 */
 	guest_pa_bits = 39;
 #endif
+#ifdef __aarch64__
+	if (guest_pa_bits != 40)
+		type = KVM_VM_TYPE_ARM_IPA_SIZE(guest_pa_bits);
+#endif
 	max_gfn = (1ul << (guest_pa_bits - guest_page_shift)) - 1;
 	guest_page_size = (1ul << guest_page_shift);
 	/* 1G of guest page sized pages */
···
 	bmap = bitmap_alloc(host_num_pages);
 	host_bmap_track = bitmap_alloc(host_num_pages);
 
-	vm = create_vm(mode, VCPU_ID, guest_num_pages, guest_code);
+	vm = create_vm(mode, VCPU_ID, guest_num_pages, guest_code, type);
 
 #ifdef USE_CLEAR_DIRTY_LOG
 	struct kvm_enable_cap cap = {};
···
 	unsigned long interval = TEST_HOST_LOOP_INTERVAL;
 	bool mode_selected = false;
 	uint64_t phys_offset = 0;
-	unsigned int mode;
+	unsigned int mode, host_ipa_limit;
 	int opt, i;
 
 #ifdef USE_CLEAR_DIRTY_LOG
···
 #ifdef __aarch64__
 	vm_guest_mode_params_init(VM_MODE_P40V48_4K, true, true);
 	vm_guest_mode_params_init(VM_MODE_P40V48_64K, true, true);
+
+	host_ipa_limit = kvm_check_cap(KVM_CAP_ARM_VM_IPA_SIZE);
+	if (host_ipa_limit >= 52)
+		vm_guest_mode_params_init(VM_MODE_P52V48_64K, true, true);
+	if (host_ipa_limit >= 48) {
+		vm_guest_mode_params_init(VM_MODE_P48V48_4K, true, true);
+		vm_guest_mode_params_init(VM_MODE_P48V48_64K, true, true);
+	}
 #endif
 
 	while ((opt = getopt(argc, argv, "hi:I:p:m:")) != -1) {

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

···
 int vm_enable_cap(struct kvm_vm *vm, struct kvm_enable_cap *cap);
 
 struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm);
+struct kvm_vm *_vm_create(enum vm_guest_mode mode, uint64_t phy_pages,
+			  int perm, unsigned long type);
 void kvm_vm_free(struct kvm_vm *vmp);
 void kvm_vm_restart(struct kvm_vm *vmp, int perm);
 void kvm_vm_release(struct kvm_vm *vmp);

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

···
 	return ret;
 }
 
-static void vm_open(struct kvm_vm *vm, int perm)
+static void vm_open(struct kvm_vm *vm, int perm, unsigned long type)
 {
 	vm->kvm_fd = open(KVM_DEV_PATH, perm);
 	if (vm->kvm_fd < 0)
 		exit(KSFT_SKIP);
 
-	vm->fd = ioctl(vm->kvm_fd, KVM_CREATE_VM, NULL);
+	vm->fd = ioctl(vm->kvm_fd, KVM_CREATE_VM, type);
 	TEST_ASSERT(vm->fd >= 0, "KVM_CREATE_VM ioctl failed, "
 		"rc: %i errno: %i", vm->fd, errno);
 }
···
  * descriptor to control the created VM is created with the permissions
  * given by perm (e.g. O_RDWR).
  */
-struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm)
+struct kvm_vm *_vm_create(enum vm_guest_mode mode, uint64_t phy_pages,
+			  int perm, unsigned long type)
 {
 	struct kvm_vm *vm;
 	int kvm_fd;
···
 	TEST_ASSERT(vm != NULL, "Insufficient Memory");
 
 	vm->mode = mode;
-	vm_open(vm, perm);
+	vm->type = type;
+	vm_open(vm, perm, type);
 
 	/* Setup mode specific traits. */
 	switch (vm->mode) {
···
 	return vm;
 }
 
+struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm)
+{
+	return _vm_create(mode, phy_pages, perm, 0);
+}
+
 /*
  * VM Restart
  *
···
 {
 	struct userspace_mem_region *region;
 
-	vm_open(vmp, perm);
+	vm_open(vmp, perm, vmp->type);
 	if (vmp->has_irqchip)
 		vm_create_irqchip(vmp);
 

tools/testing/selftests/kvm/lib/kvm_util_internal.h

···
 
 struct kvm_vm {
 	int mode;
+	unsigned long type;
 	int kvm_fd;
 	int fd;
 	unsigned int pgtable_levels;