def pnp_uart(path, uid, ddn, port, irq):
resources = []
cls = rdt.SmallResourceItemIOPort
length = ctypes.sizeof(cls)
data = bytearray(length)
res = cls.from_buffer(data)
res.type = 0
res.name = rdt.SMALL_RESOURCE_ITEM_IO_PORT
res.length = 7
res._DEC = 1
res._MIN = port
res._MAX = port
res._ALN = 1
res._LEN = 8
resources.append(data)
cls = rdt.SmallResourceItemIRQ_factory(2)
length = ctypes.sizeof(cls)
data = bytearray(length)
res = cls.from_buffer(data)
res.type = 0
res.name = rdt.SMALL_RESOURCE_ITEM_IRQ_FORMAT
res.length = 2
res._INT = 1 << irq
resources.append(data)
resources.append(bytes([0x79, 0]))
resource_buf = bytearray().join(resources)
checksum = (256 - (sum(resource_buf) % 256)) % 256
resource_buf[-1] = checksum
uart = builder.DefDevice(
builder.PkgLength(),
path,
builder.TermList(
builder.DefName(
"_HID",
builder.DWordConst(encode_eisa_id("PNP0501"))),
builder.DefName(
"_UID",
builder.build_value(uid)),
builder.DefName(
"_DDN",
builder.String(ddn)),
builder.DefName(
"_CRS",
builder.DefBuffer(
builder.PkgLength(),
builder.WordConst(len(resource_buf)),
builder.ByteList(resource_buf)))))
return uart
def gen_dsdt(board_etree, scenario_etree, allocation_etree, vm_id, dest_path):
interrupt_pin_ids = {
"INTA#": 0,
"INTB#": 1,
"INTC#": 2,
"INTD#": 3,
}
header = builder.DefBlockHeader(
int.from_bytes(bytearray("DSDT", "ascii"), sys.byteorder), # Signature
0x0badbeef, # Length, will calculate later
3, # Revision
0, # Checksum, will calculate later
int.from_bytes(bytearray("ACRN ", "ascii"), sys.byteorder), # OEM ID
int.from_bytes(bytearray("ACRNDSDT", "ascii"),
sys.byteorder), # OEM Table ID
1, # OEM Revision
int.from_bytes(bytearray("INTL", "ascii"),
sys.byteorder), # Compiler ID
0x20190703, # Compiler Version
)
objects = ObjectCollector()
prt_packages = []
pci_dev_regex = re.compile(r"([0-9a-f]{2}):([0-1][0-9a-f]{1}).([0-7]) .*")
for pci_dev in scenario_etree.xpath(
f"//vm[@id='{vm_id}']/pci_devs/pci_dev/text()"):
m = pci_dev_regex.match(pci_dev)
if m:
device_number = int(m.group(2), 16)
function_number = int(m.group(3))
bus_number = int(m.group(1), 16)
bdf = f"{bus_number:02x}:{device_number:02x}.{function_number}"
address = hex((device_number << 16) | (function_number))
device_node = common.get_node(
f"//bus[@address='{hex(bus_number)}']/device[@address='{address}']",
board_etree)
alloc_node = common.get_node(
f"/acrn-config/vm[@id='{vm_id}']/device[@name='PTDEV_{bdf}']",
allocation_etree)
if device_node is not None and alloc_node is not None:
assert int(alloc_node.find("bus").text,
16) == 0, "Virtual PCI devices must be on bus 0."
vdev = int(alloc_node.find("dev").text, 16)
vfunc = int(alloc_node.find("func").text, 16)
# The AML object template, with _ADR replaced to vBDF
template = device_node.find("aml_template")
if template is not None:
tree = parse_tree("DefDevice",
bytes.fromhex(template.text))
vaddr = (vdev << 16) | vfunc
add_or_replace_object(
tree,
builder.DefName("_ADR", builder.build_value(vaddr)))
objects.add_device_object(tree)
# The _PRT remapping package, if necessary
intr_pin_node = common.get_node(
"resource[@type='interrupt_pin']", device_node)
virq_node = common.get_node("pt_intx", alloc_node)
if intr_pin_node is not None and virq_node is not None:
pin_id = interrupt_pin_ids[intr_pin_node.get("pin")]
vaddr = (vdev << 16) | 0xffff
pirq = int(intr_pin_node.get("source", -1))
virq_mapping = dict(
eval(
f"[{virq_node.text.replace(' ','').replace(')(', '), (')}]"
))
if pirq in virq_mapping.keys():
virq = virq_mapping[pirq]
prt_packages.append(
builder.DefPackage(
builder.PkgLength(), builder.ByteData(4),
builder.PackageElementList(
builder.build_value(vaddr),
builder.build_value(pin_id),
builder.build_value(0),
builder.build_value(virq))))
for peer_device_node in collect_dependent_devices(
board_etree, device_node):
template = peer_device_node.find("aml_template")
if template is not None:
tree = parse_tree("DefDevice",
bytes.fromhex(template.text))
objects.add_device_object(tree)
root_pci_bus = board_etree.xpath("//bus[@type='pci' and @address='0x0']")
if root_pci_bus:
acpi_object = root_pci_bus[0].find("acpi_object")
if acpi_object is not None:
path = acpi_object.text
objects.add_device_object(gen_root_pci_bus(path, prt_packages))
# If TPM is assigned to the VM, copy the TPM2 device object to vACPI as well.
#
# FIXME: Today the TPM2 MMIO registers are always located at 0xFED40000 with length 0x5000. The same address is used
# as the guest physical address of the passed through TPM2. Thus, it works for now to reuse the host TPM2 device
# object without updating the addresses of operation regions or resource descriptors. It is, however, necessary to
# introduce a pass to translate such address to arbitrary guest physical ones in the future.
has_tpm2 = common.get_node(f"//vm[@id='{vm_id}']//TPM2/text()",
scenario_etree)
if has_tpm2 == "y":
# TPM2 devices should have "MSFT0101" as hardware id or compatible ID
template = common.get_node("//device[@id='MSFT0101']/aml_template",
board_etree)
if template is None:
template = common.get_node(
"//device[compatible_id='MSFT0101']/aml_template", board_etree)
if template is not None:
tree = parse_tree("DefDevice", bytes.fromhex(template.text))
objects.add_device_object(tree)
s5_object = builder.DefName(
"_S5_",
builder.DefPackage(
builder.PkgLength(), 2,
builder.PackageElementList(builder.build_value(5),
builder.build_value(0))))
objects.add_object("\\", s5_object)
rtvm = False
for guest_flag in scenario_etree.xpath(
f"//vm[@id='{vm_id}']/guest_flags/guest_flag/text()"):
if guest_flag == 'GUEST_FLAG_LAPIC_PASSTHROUGH':
rtvm = True
break
# RTVM cannot set IRQ because no INTR is sent with LAPIC PT
if rtvm is False:
objects.add_object("\\_SB_", pnp_uart("UAR0", 0, "COM1", 0x3f8, 4))
objects.add_object("\\_SB_", pnp_uart("UAR1", 1, "COM2", 0x2f8, 3))
objects.add_object("\\_SB_", pnp_rtc("RTC0"))
amlcode = builder.AMLCode(header, *objects.get_term_list())
with open(dest_path, "wb") as dest:
visitor = GenerateBinaryVisitor()
binary = bytearray(visitor.generate(amlcode))
# Overwrite length
binary[4:8] = len(binary).to_bytes(4, sys.byteorder)
# Overwrite checksum
checksum = (256 - (sum(binary) % 256)) % 256
binary[9] = checksum
dest.write(binary)
def aux(device_path, obj_name, result):
# This is the main function that recursively scans dependent object definitions and include either their
# original definition or calculated values into the AML template. The algorithm is as follows:
#
# 1. Collect the objects that are used (either directly or indirectly) by the given object.
#
# 2. Determine how this object should go to the AML template by the following rules.
#
# a. If the object depends on any global object (i.e. not in the scope of any device), the object will not
# be put to the AML template at all. Up to now we are not aware of any safe way to expose the object to
# VMs as global objects can be operation fields within arbitrary memory-mapped regions.
#
# b. If the object depends on any operation field that is exposed to a VM, the object will be copied as is
# in the AML template.
#
# c. Otherwise, it will be replaced with the current evaluated value as it is unlikely to change due to
# guest software activities.
#
# Operation regions and its fields, when necessary, are always copied as is.
#
# Dependency among devices are also collected along the way.
if not obj_name in device_objects[device_path].keys():
visitor = CollectDependencyVisitor(interpreter)
deps = visitor.analyze(device_path, obj_name)
copy_object = False
if deps.all:
# If the object refers to any operation region directly or indirectly, it is generally necessary to copy
# the original definition of the object.
for dev, decls in deps.all.items():
if next(filter(lambda x: isinstance(x, context.OperationFieldDecl) and visitor.is_exposed_field(x), decls), None):
copy_object = True
break
evaluated = (result != None)
need_global = ("global" in deps.all.keys())
formatter = lambda x: '+' if x else '-'
logging.info(f"{device_path}.{obj_name}: Evaluated{formatter(evaluated)} Copy{formatter(copy_object)} NeedGlobal{formatter(need_global)}")
if result == None or copy_object:
if need_global:
global_objs = ', '.join(map(lambda x: x.name, deps.all["global"]))
raise NotImplementedError(f"{device_path}.{obj_name}: references to global objects: {global_objs}")
# Add directly referred objects first
for peer_device, peer_decls in deps.direct.items():
if peer_device == "global":
peer_device = device_path
for peer_decl in peer_decls:
peer_obj_name = peer_decl.name[-4:]
if isinstance(peer_decl, context.OperationRegionDecl):
aux(peer_device, peer_obj_name, None)
elif isinstance(peer_decl, context.OperationFieldDecl):
op_region_name = peer_decl.region
# Assume an operation region has at most one DefField object defining its fields
device_objects[peer_device][f"{op_region_name}_fields"] = peer_decl.parent_tree
else:
if isinstance(peer_decl, context.MethodDecl) and peer_decl.nargs > 0:
raise NotImplementedError(f"{peer_decl.name}: copy of methods with arguments is not supported")
value = interpreter.interpret_method_call(peer_decl.name)
aux(peer_device, peer_obj_name, value)
# If decl is of another device, declare decl as an external symbol in the template of
# device_path so that the template can be parsed on its own
if peer_device != device_path:
device_objects[device_path][peer_decl.name] = builder.DefExternal(
peer_decl.name,
peer_decl.object_type(),
peer_decl.nargs if isinstance(peer_decl, context.MethodDecl) else 0)
device_deps[device_path][DEP_TYPE_USES].add(peer_device)
device_deps[peer_device][DEP_TYPE_USED_BY].add(device_path)
decl = interpreter.context.lookup_symbol(obj_name, device_path)
device_objects[device_path][obj_name] = decl.tree
else:
tree = builder.build_value(result)
if tree:
device_objects[device_path][obj_name] = builder.DefName(obj_name, tree)
else:
raise NotImplementedError(f"{device_path}.{obj_name}: unrecognized type: {result.__class__.__name__}")