mirror of
https://github.com/chipsec/chipsec
synced 2026-06-08 13:31:00 +00:00
Frinzell, Aaron
103 lines
3.7 KiB
Python
103 lines
3.7 KiB
Python
# CHIPSEC: Platform Security Assessment Framework
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# Copyright (c) 2018 - 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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Displays CPU information
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Reference:
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- Intel 64 and IA-32 Architectures Software Developer Manual (SDM)
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- https://www.intel.com/content/www/us/en/developer/articles/technical/intel-sdm.html
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Usage:
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``chipsec_main -m common.cpu.cpu_info``
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Examples:
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>>> chipsec_main.py -m common.cpu.cpu_info
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Registers used:
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- IA32_BIOS_SIGN_ID.Microcode
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.. note:
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No PASS/FAIL returned, INFORMATION only.
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"""
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import struct
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from chipsec.module_common import BaseModule, ModuleResult
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from chipsec.defines import bytestostring
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class cpu_info(BaseModule):
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def __init__(self):
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super(cpu_info, self).__init__()
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def is_supported(self):
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if self.cs.register_has_field('IA32_BIOS_SIGN_ID', 'Microcode'):
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return True
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self.logger.log_important('IA32_BIOS_SIGN_ID.Microcode not defined for platform. Skipping module.')
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self.res = ModuleResult.NOTAPPLICABLE
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return False
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def run(self, module_argv):
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# Log the start of the test
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self.logger.start_test('Current Processor Information:')
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self.res = ModuleResult.INFORMATION
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# Determine number of threads to check
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thread_count = 1
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if not self.cs.helper.is_efi():
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thread_count = self.cs.msr.get_cpu_thread_count()
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for thread in range(thread_count):
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# Handle processor binding so we are always checking processor 0
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# for this example. No need to do this in UEFI Shell.
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if not self.cs.helper.is_efi():
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self.cs.helper.set_affinity(thread)
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# Display thread
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self.logger.log('[*] Thread {:04d}'.format(thread))
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# Get processor brand string
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brand = ''
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for eax_val in [0x80000002, 0x80000003, 0x80000004]:
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regs = self.cs.cpu.cpuid(eax_val, 0)
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for i in range(4):
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brand += bytestostring(struct.pack('<I', regs[i]))
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brand = brand.rstrip('\x00')
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self.logger.log('[*] Processor: {}'.format(brand))
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# Get processor version information
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(eax, _, _, _) = self.cs.cpu.cpuid(0x01, 0x00)
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stepping = eax & 0xF
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model = (eax >> 4) & 0xF
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family = (eax >> 8) & 0xF
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if (family == 0x0F) or (family == 0x06):
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model = ((eax >> 12) & 0xF0) | model
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if family == 0x0F:
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family = ((eax >> 20) & 0xFF) | family
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self.logger.log('[*] Family: {:02X} Model: {:02X} Stepping: {:01X}'.format(family, model, stepping))
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# Get microcode revision
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microcode_rev = self.cs.read_register_field('IA32_BIOS_SIGN_ID', 'Microcode', cpu_thread=thread)
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self.logger.log('[*] Microcode: {:08X}'.format(microcode_rev))
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self.logger.log('[*]')
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self.logger.log_information('Processor information displayed')
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return self.res
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