psptrace 0.4

PSPTrace can correlate an SPI capture of an AMD boot procedure to the PSP firmware components

PSPTrace

PSPTrace can be used to correlate an SPI capture of an AMD boot procedure recorded with a Saleae Logic analyzer to the PSP firmware of a UEFI image.

SPI captures must be exported from the Saleae Logic software via Analyzers > SPI > Export as text/csv file. Please make sure you sampled with an appropriate sample rate and the SPI analyzer is set to Hex.

PSPTrace requires PSPTool to be installed.

$ python3 psptrace.py
Error: the following arguments are required: csvfile, romfile
usage: psptrace.py [-h] [-o] [-n] [-c] [-t] [-l LIMIT_ROWS] [-v] csvfile romfile

Read in an SPI capture created by a Saleae Logic Analyzer and a ROM file resembling the flash contents and display an access
chronology. On first load, psptrace needs to parse a lot of raw data which will be saved on disk. All other loads will then be
much faster.

positional arguments:
  csvfile               CSV file of SPI capture
  romfile               ROM file of SPI contents

optional arguments:
  -h, --help            show this help message and exit
  -o, --overview-mode   aggregate accesses to the same firmware entry
  -n, --no-duplicates   hide duplicate accesses (e.g. caused by multiple PSPs)
  -c, --collapse        collapse consecutive reads to the same PSP entry type (denoted by [c] and sometimes by ~ if collapsing
                        was fuzzy)
  -t, --normalize-timestamps
                        normalize all timestamps
  -l LIMIT_ROWS, --limit-rows LIMIT_ROWS
                        limit the processed rows to a maximum of n
  -v, --verbose         increase output verbosity

Example usage

After recording the boot procedure of a Supermicro server system with an AMD Epyc CPU, PSPTrace outputs the following boot in overview mode (-o):

$ psptrace -o spi_trace.txt flash.bin

Info: Creating database in spi_trace.txt.pickle ...
Info: Parsed and stored a database of 14028942 rows.
+---------+---------------+----------+-----------------------------+------+
|   No.   | Lowest access |  Range   |             Type            | Info |
+---------+---------------+----------+-----------------------------+------+
|    0    |    0x820000   | 0x780007 |         Unknown area        |      |
|    22   |    0x020000   | 0x00001c |     Firmware Entry Table    |      |
|    33   |    0x077000   | 0x00012a |       Directory: $PSP       |      |
|    70   |    0x077000   | 0x000100 |       Directory: $PSP       | CCP  |
|   107   |    0x077400   | 0x000240 |        AMD_PUBLIC_KEY       | CCP  |
|   177   |    0x149400   | 0x00d780 |      PSP_FW_BOOT_LOADER     | CCP  |
|         |               |          |                             |      |
|         |               |          |      ~ 3410 µs delay ~      |      |
|         |               |          |                             |      |
|   7084  |    0x149000   | 0x000180 |       Directory: $PL2       | CCP  |
|   7090  |    0x000000   | 0x020046 |         Unknown area        |      |
|   7091  |    0x020000   | 0x000024 |     Firmware Entry Table    |      |
|         |               |          |                             |      |
|         |               |          |       ~ 66 µs delay ~       |      |
|         |               |          |                             |      |
|   7095  |    0x117000   | 0x000160 |       Directory: $BHD       |      |
|   7096  |    0x149000   | 0x000152 |       Directory: $PL2       |      |
|   7554  |    0x000000   | 0x117280 |         Unknown area        |      |
|   7581  |    0x020000   | 0x000022 |     Firmware Entry Table    |      |
|   7859  |    0x249000   | 0x0001c0 |       Directory: $BL2       | CCP  |
|   7880  |    0x1170c0   | 0x000080 |       Directory: $BHD       | CCP  |
|   7909  |    0x2491c0   | 0x000240 |         Unknown area        | CCP  |
|   8017  |    0x249010   | 0x00019a |       Directory: $BL2       |      |
|   8560  |    0x17c100   | 0x001932 |         DEBUG_UNLOCK        |      |
|   8939  |    0x17c200   | 0x001800 |         DEBUG_UNLOCK        | CCP  |
|  10144  |    0x177a00   | 0x0001c0 |      SEC_DBG_PUBLIC_KEY     |      |
|  10576  |    0x177bc0   | 0x000180 |      SEC_DBG_PUBLIC_KEY     | CCP  |
|         |               |          |                             |      |
|         |               |          |       ~ 178 µs delay ~      |      |
|         |               |          |                             |      |
|  10582  |    0x17e000   | 0x000080 |         TOKEN_UNLOCK        | CCP  |

[...]