mirror of
https://github.com/chipsec/chipsec
synced 2026-06-08 13:31:00 +00:00
Nathaniel Mitchell
106 lines
4.5 KiB
Python
106 lines
4.5 KiB
Python
# CHIPSEC: Platform Security Assessment Framework
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# Copyright (c) 2010-2021, Intel Corporation
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; Version 2.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# Contact information:
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# chipsec@intel.com
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#
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"""
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The mmcfg command allows direct access to memory mapped config space.
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>>> chipsec_util mmcfg base
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>>> chipsec_util mmcfg read <bus> <device> <function> <offset> <width>
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>>> chipsec_util mmcfg write <bus> <device> <function> <offset> <width> <value>
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>>> chipsec_util mmcfg ec
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Examples:
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>>> chipsec_util mmcfg base
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>>> chipsec_util mmcfg read 0 0 0 0x200 4
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>>> chipsec_util mmcfg write 0 0 0 0x200 1 0x1A
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>>> chipsec_util mmcfg ec
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"""
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from chipsec.command import BaseCommand, toLoad
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from argparse import ArgumentParser
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# Access to Memory Mapped PCIe Configuration Space (MMCFG)
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class MMCfgCommand(BaseCommand):
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def requirements(self) -> toLoad:
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return toLoad.All
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def parse_arguments(self) -> None:
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parser = ArgumentParser(prog='chipsec_util mmcfg', usage=__doc__)
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subparsers = parser.add_subparsers()
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parser_base = subparsers.add_parser('base')
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parser_base.set_defaults(func=self.base)
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parser_read = subparsers.add_parser('read')
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parser_read.set_defaults(func=self.read)
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parser_read.add_argument('bus', type=lambda x: int(x, 16), help='Bus (hex)')
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parser_read.add_argument('device', type=lambda x: int(x, 16), help='Device (hex)')
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parser_read.add_argument('function', type=lambda x: int(x, 16), help='Function (hex)')
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parser_read.add_argument('offset', type=lambda x: int(x, 16), help='Offset (hex)')
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parser_read.add_argument('width', type=int, choices=[1, 2, 4], help='Width')
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parser_write = subparsers.add_parser('write')
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parser_write.set_defaults(func=self.write)
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parser_write.add_argument('bus', type=lambda x: int(x, 16), help='Bus (hex)')
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parser_write.add_argument('device', type=lambda x: int(x, 16), help='Device (hex)')
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parser_write.add_argument('function', type=lambda x: int(x, 16), help='Function (hex)')
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parser_write.add_argument('offset', type=lambda x: int(x, 16), help='Offset (hex)')
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parser_write.add_argument('width', type=int, choices=[1, 2, 4], help='Width')
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parser_write.add_argument('value', type=lambda x: int(x, 16), help='Value to write (hex)')
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# Print the pcie extended capabilities
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parser_ec = subparsers.add_parser('ec')
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parser_ec.set_defaults(func=self.ec)
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parser.parse_args(self.argv, namespace=self)
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def base(self):
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pciexbar, pciexbar_sz = self.cs.hals.mmcfg.get_MMCFG_base_address()
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self.logger.log(f'[CHIPSEC] Memory Mapped Config Base: 0x{pciexbar:016X}')
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self.logger.log(f'[CHIPSEC] Memory Mapped Config Size: 0x{pciexbar_sz:016X}')
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def read(self):
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data = self.cs.hals.mmcfg.read_mmcfg_reg(self.bus, self.device, self.function, self.offset, self.width)
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self.logger.log(f'[CHIPSEC] Reading MMCFG register ({self.bus:02d}:{self.device:02d}.{self.function:d} + 0x{self.offset:02X}): 0x{data:X}')
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def write(self):
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self.cs.hals.mmcfg.write_mmcfg_reg(self.bus, self.device, self.function, self.offset, self.width, self.value)
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self.logger.log(f'[CHIPSEC] Writing MMCFG register ({self.bus:02d}:{self.device:02d}.{self.function:d} + 0x{self.offset:02X}): 0x{self.value:X}')
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def ec(self):
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devs = self.cs.hals.pci.enumerate_devices()
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for (b, d, f, _, _, _) in devs:
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capabilities = self.cs.hals.mmcfg.get_extended_capabilities(b, d, f)
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if capabilities:
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self.logger.log(f'Extended Capabilities for {b:02X}:{d:02X}.{f:X}:')
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for cap in capabilities:
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self.logger.log(f'{cap}')
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if cap.id == 0xB:
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vsec = self.cs.hals.mmcfg.get_vsec(b, d, f, cap.off)
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self.logger.log(f'\t{vsec}')
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commands = {'mmcfg': MMCfgCommand}
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