3 # Jailhouse, a Linux-based partitioning hypervisor
5 # Copyright (c) Siemens AG, 2014
7 # This work is licensed under the terms of the GNU GPL, version 2. See
8 # the COPYING file in the top-level directory.
10 # This script should help to create a basic jailhouse configuration file.
11 # It needs to be executed on the target machine, where it will gather
12 # information about the system. For more advanced scenarios you will have
13 # to change the generated C-code.
15 from __future__ import print_function
21 from mako.template import Template
23 # pretend to be part of the jailhouse tool
24 sys.argv[0] = sys.argv[0].replace('-', ' ')
26 parser = argparse.ArgumentParser()
27 parser.add_argument('-g', '--generate-collector',
28 help='generate a script to collect input files on '
31 parser.add_argument('-r', '--root',
32 help='gather information in ROOT/, the default is "/" '
33 'which means creating a config for localhost',
38 memargs = [['--mem-inmates', '2M', 'inmate'],
39 ['--mem-hv', '64M', 'hypervisor']]
42 parser.add_argument(entry[0],
43 help='the amount of ' + entry[2] +
44 ' memory, default is "' + entry[1] +
45 '", format "xxx[K|M|G]"',
50 parser.add_argument('file', metavar='FILE',
51 help='name of file to write out',
54 options = parser.parse_args()
56 inputs = {'files': set(), 'files_opt': set(), 'dirs': set()}
60 def __init__(self, type, domain, bus, dev, fn):
68 return 'PCIDevice: %02x:%02x.%x' % (self.bus, self.dev, self.fn)
71 return self.dev << 3 | self.fn
74 def parse_pcidevice_sysfsdir(basedir, dir):
75 dclass = input_readline(basedir + '/' + dir + '/class')
76 if re.match(r'0x0604..', dclass):
77 type = 'JAILHOUSE_PCI_TYPE_BRIDGE'
79 type = 'JAILHOUSE_PCI_TYPE_DEVICE'
81 domain = int(a[0], 16)
84 return PCIDevice(type, domain, bus, int(df[0], 16), int(df[1], 16))
88 def __init__(self, start, stop, typestr, comments=[]):
91 self.typestr = typestr
92 self.comments = comments
95 return 'MemRegion: %08x-%08x : %s' % \
96 (self.start, self.stop, self.typestr)
99 # round up to full PAGE_SIZE
100 return int((self.stop - self.start + 0xfff) / 0x1000) * 0x1000
102 def flagstr(self, p=''):
104 self.typestr == 'ACPI Tables' or
105 self.typestr == 'ACPI Non-volatile Storage'
107 return 'JAILHOUSE_MEM_READ'
109 self.typestr == 'System RAM' or
110 self.typestr == 'RAM buffer' or
111 self.typestr == 'ACPI DMAR RMRR'
113 s = 'JAILHOUSE_MEM_READ | JAILHOUSE_MEM_WRITE |\n'
114 s += p + '\t\tJAILHOUSE_MEM_EXECUTE | JAILHOUSE_MEM_DMA'
116 return 'JAILHOUSE_MEM_READ | JAILHOUSE_MEM_WRITE'
119 # return the first region with the given typestr
120 def find_region(regions, typestr):
122 if (r.typestr == typestr):
127 def parse_iomem_line(line):
128 a = line.split(':', 1)
129 # HPET may be part of in reserved region
130 if a[0].startswith(' ') and a[1].find("HPET") < 0:
132 region = a[0].split('-', 1)
134 return MemRegion(int(region[0], 16), int(region[1], 16), a[1])
139 f = input_open('/proc/iomem')
141 r = MemRegion.parse_iomem_line(line)
142 ## XXX what else to ignore??
145 r.typestr != 'Local APIC' and
146 r.typestr != 'reserved'
151 # newer Linux kernels will report the first page as reserved
152 # it is needed for CPU init so include it anyways
154 regions[0].typestr == 'System RAM' and
155 regions[0].start == 0x1000
162 def parse_pcidevices():
164 basedir = '/sys/bus/pci/devices'
165 list = input_listdir(basedir, ['*/class'])
167 d = PCIDevice.parse_pcidevice_sysfsdir(basedir, dir)
173 def kmg_multiply(value, kmg):
174 if (kmg == 'K' or kmg == 'k'):
176 if (kmg == 'M' or kmg == 'm'):
177 return 1024**2 * value
178 if (kmg == 'G' or kmg == 'g'):
179 return 1024**3 * value
183 def kmg_multiply_str(str):
184 m = re.match(r'([0-9a-fA-FxX]+)([KMG]?)', str)
186 return kmg_multiply(int(m.group(1)), m.group(2))
187 raise RuntimeError('kmg_multiply_str can not parse input "' + str + '"')
191 def input_open(name, mode='r', optional=False):
192 inputs['files_opt' if optional else 'files'].add(name)
194 f = open(options.root + name, mode)
195 except Exception as e:
196 if optional or options.generate_collector:
197 return open("/dev/null", mode)
202 def input_readline(name, optional=False):
203 f = input_open(name, optional=optional)
209 def input_listdir(dir, wildcards):
211 inputs['dirs'].add(dir + '/' + w)
212 if options.generate_collector:
214 return os.listdir(options.root + dir)
218 line = input_readline('/proc/cmdline')
219 m = re.match(r'.*memmap=([0-9a-fA-FxX]+)([KMG]?)\$'
220 '([0-9a-fA-FxX]+)([KMG]?).*',
223 size = kmg_multiply(int(m.group(1), 0), m.group(2))
224 start = kmg_multiply(int(m.group(3), 0), m.group(4))
229 def alloc_mem(regions, size):
231 for r in reversed(regions):
232 if (r.typestr == 'System RAM' and r.size() >= mem[1]):
236 raise RuntimeError('failed to allocate memory')
240 list = input_listdir('/sys/devices/system/cpu', ['cpu*/uevent'])
243 if re.match(r'cpu[0-9]+', f):
248 def parse_dmar_devscope(f):
250 (scope_type, scope_len, bus, dev, fn) = \
251 struct.unpack('<BBxxxBBB', f.read(8))
253 return (offset, scope_type, scope_len, bus, dev, fn)
256 # parsing of DMAR ACPI Table
257 # see Intel VT-d Spec chapter 8
259 f = input_open('/sys/firmware/acpi/tables/DMAR', 'rb')
260 signature = f.read(4)
261 if signature != b'DMAR':
262 if options.generate_collector:
264 raise RuntimeError('incorrect input file format %s' % signature)
265 (length,) = struct.unpack('<I', f.read(4))
273 (struct_type, struct_len) = struct.unpack('<HH', f.read(4))
277 # DMA Remapping Hardware Unit Definition
279 f.seek(16 - offset, os.SEEK_CUR)
280 offset += 16 - offset
281 while offset < struct_len:
282 (off, scope_type, scope_len, bus, dev, fn) =\
283 parse_dmar_devscope(f)
287 raise RuntimeError('We do not support more '
289 ioapic_id = (bus << 8) | (dev << 3) | fn
290 f.seek(scope_len - 8, os.SEEK_CUR)
291 offset += scope_len - 8
293 # Reserved Memory Region Reporting Structure
295 f.seek(8 - offset, os.SEEK_CUR)
297 (base, limit) = struct.unpack('<QQ', f.read(16))
301 while offset < struct_len:
302 (off, scope_type, scope_len, bus, dev, fn) =\
303 parse_dmar_devscope(f)
305 npath = (scope_len - 6)/2
306 if scope_type == 1 and npath == 1:
307 comments.append('PCI device: %02x:%02x.%x' %
310 comments.append('DMAR parser could not decode device path')
311 f.seek(scope_len - off, os.SEEK_CUR)
312 offset += scope_len - off
314 reg = MemRegion(base, limit, 'ACPI DMAR RMRR', comments)
317 f.seek(struct_len - offset, os.SEEK_CUR)
319 return ioapic_id, regions
324 f = input_open('/proc/ioports')
326 if line.endswith('ACPI PM_TMR\n'):
327 pm_timer_base = int(line.split('-')[0], 16)
333 pcidevices = parse_pcidevices()
335 product = [input_readline('/sys/class/dmi/id/sys_vendor',
337 input_readline('/sys/class/dmi/id/product_name',
341 inmatemem = kmg_multiply_str(options.mem_inmates)
342 hvmem = [0, kmg_multiply_str(options.mem_hv)]
344 regions = parse_iomem()
345 ourmem = parse_cmdline()
346 total = hvmem[1] + inmatemem
348 ioapic_id, rmrr_regs = parse_dmar()
351 # kernel does not have memmap region, pick one
353 ourmem = alloc_mem(regions, total)
354 elif (total > ourmem[1]):
355 raise RuntimeError('Your memmap reservation is too small you need >="' +
360 creg = MemRegion.find_region(regions, 'ACPI Tables')
362 confmem = [creg.start, creg.size()]
364 print('WARNING: Could not find "ACPI Tables" memory! '
365 'You need to set it manually.', file=sys.stderr)
367 inmatereg = MemRegion(ourmem[0] + hvmem[1],
368 ourmem[0] + hvmem[1] + inmatemem - 1,
369 'JAILHOUSE Inmate Memory')
370 regions.append(inmatereg)
372 cpucount = count_cpus()
374 pm_timer_base = parse_ioports()
376 jh_enabled = input_readline('/sys/devices/jailhouse/enabled',
378 if options.generate_collector is False and jh_enabled == '1':
379 print('ERROR: Jailhouse was enabled when collecting input files! '
380 'Disable jailhouse and try again.',
384 f = open(options.file, 'w')
386 if options.generate_collector:
387 filelist = ' '.join(inputs['files'].union(inputs['dirs']))
388 filelist_opt = ' '.join(inputs['files_opt'])
390 tmpl = Template(filename='jailhouse-config-collect.tmpl')
391 f.write(tmpl.render(filelist=filelist, filelist_opt=filelist_opt))
393 tmpl = Template(filename='root-cell-config.c.tmpl')
394 f.write(tmpl.render(regions=regions,
396 argstr=' '.join(sys.argv),
400 pcidevices=pcidevices,
403 pm_timer_base=pm_timer_base))