KVM: selftests: Add VM_MODE_P47V47_16K VM mode

On LoongArch system, 16K page is used in general and GVA width is 47 bit
while GPA width is 47 bit also, here add new VM mode VM_MODE_P47V47_16K.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Author: bibo-mao

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

@@ -177,6 +177,7 @@ enum vm_guest_mode {
 	VM_MODE_P36V48_4K,
 	VM_MODE_P36V48_16K,
 	VM_MODE_P36V48_64K,
+	VM_MODE_P47V47_16K,
 	VM_MODE_P36V47_16K,
 	NUM_VM_MODES,
 };

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

@@ -222,6 +222,7 @@ const char *vm_guest_mode_string(uint32_t i)
 		[VM_MODE_P36V48_4K]	= "PA-bits:36,  VA-bits:48,  4K pages",
 		[VM_MODE_P36V48_16K]	= "PA-bits:36,  VA-bits:48, 16K pages",
 		[VM_MODE_P36V48_64K]	= "PA-bits:36,  VA-bits:48, 64K pages",
+		[VM_MODE_P47V47_16K]	= "PA-bits:47,  VA-bits:47, 16K pages",
 		[VM_MODE_P36V47_16K]	= "PA-bits:36,  VA-bits:47, 16K pages",
 	};
 	_Static_assert(sizeof(strings)/sizeof(char *) == NUM_VM_MODES,
@@ -248,6 +249,7 @@ const struct vm_guest_mode_params vm_guest_mode_params[] = {
 	[VM_MODE_P36V48_4K]	= { 36, 48,  0x1000, 12 },
 	[VM_MODE_P36V48_16K]	= { 36, 48,  0x4000, 14 },
 	[VM_MODE_P36V48_64K]	= { 36, 48, 0x10000, 16 },
+	[VM_MODE_P47V47_16K]	= { 47, 47,  0x4000, 14 },
 	[VM_MODE_P36V47_16K]	= { 36, 47,  0x4000, 14 },
 };
 _Static_assert(sizeof(vm_guest_mode_params)/sizeof(struct vm_guest_mode_params) == NUM_VM_MODES,
@@ -319,6 +321,7 @@ struct kvm_vm *____vm_create(struct vm_shape shape)
 	case VM_MODE_P36V48_16K:
 		vm->pgtable_levels = 4;
 		break;
+	case VM_MODE_P47V47_16K:
 	case VM_MODE_P36V47_16K:
 		vm->pgtable_levels = 3;
 		break;