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diff --git a/research/computing/libreboot.md b/research/computing/libreboot.md new file mode 100644 index 0000000..fa0ec98 --- /dev/null +++ b/research/computing/libreboot.md @@ -0,0 +1,149 @@ +[[!meta title="Libreboot"]] + +Also check the [additional references](https://links.fluxo.info/tags/libreboot). + +## Important note + +From [Libreboot – Installation instructions](https://libreboot.org/docs/install/index.html): + +> NOTE: if running flashrom -p internal for software based flashing, and you get +> an error related to /dev/mem access, you should reboot with iomem=relaxed +> kernel parameter before running flashrom, or use a kernel that has +> CONFIG_STRICT_DEVMEM not enabled. + +Or you might get errors like this: + + user@x60s:~/code/libreboot/libreboot_r20160907_util/flashrom/i686$ sudo ./flashrom_lenovobios_sst -p internal -r factory.bin + flashrom v0.9.9-unknown on Linux 4.9.0-2-686-pae (i686) + flashrom is free software, get the source code at https://flashrom.org + + Calibrating delay loop... OK. + Found chipset "Intel ICH7M". + Enabling flash write... Error accessing ICH RCRB, 0x4000 bytes at 0xfed1c000 + /dev/mem mmap failed: Operation not permitted + FAILED! + FATAL ERROR! + Error: Programmer initialization failed. + user@x60s:~/code/libreboot/libreboot_r20160907_util/flashrom/i686$ sudo ./flashrom_lenovobios_macronix -p internal -r factory.bin + +## Pre-compiled binaries + +[Get the latest stable release](https://libreboot.org/download.html), check integrity, etc. + +In my case I only needed these, which were the latest releases at the time of writing: + +* https://mirrors.peers.community/mirrors/libreboot/stable/20160907/SHA512SUMS +* https://mirrors.peers.community/mirrors/libreboot/stable/20160907/SHA512SUMS.sig +* https://mirrors.peers.community/mirrors/libreboot/stable/20160907/libreboot_r20160907_util.tar.xz +* https://mirrors.peers.community/mirrors/libreboot/stable/20160907/rom/grub/libreboot_r20160907_grub_x60.tar.xz + +Download and unpack bot libreboot util and rom tarballs. In this example I used the following paths: + +* `~/code/libreboot/libreboot_r20160907_util` +* `~/code/libreboot/roms/libreboot_r20160907_grub_x60` + +## Building from source + +Just if you need to: + + git clone https://notabug.org/libreboot/libreboot.git && cd libreboot + sudo ./oldbuild dependencies trisquel7 + ./download all + ./oldbuild module all + +## x60s + +This is how I've done. The actual procedure might change without notice :P + +### Overview + +* Backup the original firmware [like said](https://www.coreboot.org/Board:lenovo/x60/Installation#Back_up_the_original_proprietary_firmware). +* Then flash the new ROM as [said here](https://libreboot.org/docs/install/#flashrom_lenovobios). + +Note this [funny note](https://en.wikibooks.org/wiki/Libreboot/Install/ThinkPad_X60_and_T60) +on customized and solitary proprietary software: + +> While backing up the proprietary BIOS image might be construed as "endorsing" +> proprietary software: This BIOS image is unique to every motherboard. It will +> be impossible to restore the original BIOS once it is lost. Back it up now or +> you will lose it forever. Do not take this decision lightly. + +### BIOS Backup + + user@x60s:~/code/libreboot/libreboot_r20160907_util/flashrom/i686$ sudo ./flashrom_lenovobios_sst -p internal -r factory.bin + user@x60s:~/code/libreboot/libreboot_r20160907_util/flashrom/i686$ sudo ./flashrom_lenovobios_macronix -p internal -r factory.bin + +### Flashing + + user@x60s:~/code/libreboot/libreboot_r20160907_util$ sudo ./flash i945lenovo\_firstflash ../roms/libreboot_r20160907_grub_x60/x60_usqwerty_vesafb.rom + Mode selected: i945lenovo_firstflash + bucts utility version 'withoutgit' + Using LPC bridge 8086:27b9 at 0000:1f.00 + Current BUC.TS=0 - 128kb address range 0xFFFE0000-0xFFFFFFFF is untranslated + Updated BUC.TS=1 - 64kb address ranges at 0xFFFE0000 and 0xFFFF0000 are swapped + flashrom v0.9.9-unknown on Linux 4.9.0-2-686-pae (i686) + flashrom is free software, get the source code at https://flashrom.org + + Calibrating delay loop... OK. + Found chipset "Intel ICH7M". + Enabling flash write... WARNING: SPI Configuration Lockdown activated. + OK. + Found SST flash chip "SST25VF016B" (2048 kB, SPI) mapped at physical address 0xffe00000. + Reading old flash chip contents... done. + Erasing and writing flash chip... spi_block_erase_20 failed during command execution at address 0x0 + Reading current flash chip contents... done. Looking for another erase function. + spi_block_erase_52 failed during command execution at address 0x0 + Reading current flash chip contents... done. Looking for another erase function. + Transaction error! + spi_block_erase_d8 failed during command execution at address 0x1f0000 + Reading current flash chip contents... done. Looking for another erase function. + spi_chip_erase_60 failed during command execution + Reading current flash chip contents... done. Looking for another erase function. + spi_chip_erase_c7 failed during command execution + Looking for another erase function. + No usable erase functions left. + FAILED! + Uh oh. Erase/write failed. Checking if anything has changed. + Reading current flash chip contents... done. + Apparently at least some data has changed. + Your flash chip is in an unknown state. + Get help on IRC at chat.freenode.net (channel #flashrom) or + mail flashrom@flashrom.org with the subject "FAILED: <your board name>"! + ------------------------------------------------------------------------------- + DO NOT REBOOT OR POWEROFF! + flashrom v0.9.9-unknown on Linux 4.9.0-2-686-pae (i686) + flashrom is free software, get the source code at https://flashrom.org + + Calibrating delay loop... OK. + Found chipset "Intel ICH7M". + Enabling flash write... WARNING: SPI Configuration Lockdown activated. + OK. + No EEPROM/flash device found. + Note: flashrom can never write if the flash chip isn't found automatically. + user@x60s:~/code/libreboot/libreboot_r20160907_util$ + +Then reboot the machine, passing "iomem=relaxed" into the kernel command line. Then run the +second flash: + + user@x60s:~/code/libreboot/libreboot_r20160907_util$ sudo ./flash i945lenovo\_secondflash ../roms/libreboot_r20160907_grub_x60/x60_usqwerty_vesafb.rom + Mode selected: i945lenovo_secondflash + flashrom v0.9.9-unknown on Linux 4.9.0-2-686-pae (i686) + flashrom is free software, get the source code at https://flashrom.org + + Calibrating delay loop... OK. + coreboot table found at 0x7be9f000. + Found chipset "Intel ICH7M". + Enabling flash write... OK. + Found SST flash chip "SST25VF016B" (2048 kB, SPI) mapped at physical address 0xffe00000. + Reading old flash chip contents... done. + Erasing and writing flash chip... Erase/write done. + Verifying flash... VERIFIED. + bucts utility version 'withoutgit' + Using LPC bridge 8086:27b9 at 0000:1f.00 + Current BUC.TS=1 - 64kb address ranges at 0xFFFE0000 and 0xFFFF0000 are swapped + Updated BUC.TS=0 - 128kb address range 0xFFFE0000-0xFFFFFFFF is untranslated + user@x60s:~/code/libreboot/libreboot_r20160907_util$ + +## Issues + +* [#870006 - xserver-xorg: X60 libreboot Xorg hangs reproducibly after upgrade to stretch - Debian Bug report logs](https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=870006). |