Memtest86+
The wiki is being retired!
Documentation is now handled by the same processes we use for code: Add something to the Documentation/ directory in the coreboot repo, and it will be rendered to https://doc.coreboot.org/. Contributions welcome!
Building
Instead of building coreboot with MemTest86+ as its default payload, it is recommended to simply load the binary from your payload of choice as an extra boot option. You can also build it directly from the coreboot build by selecting it as a 'seconday payload' from the payloads menu.
Manual build
Clone the source from coreboot's memtest86+ repository. This was based on the latest released archive, then cleaned up, and then had various patches applied.
$ git clone https://review.coreboot.org/memtest86plus
CD to the directory and build it:
$ cd memtest86plus $ make
The resulting binaries are:
memtest: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), statically linked, stripped memtest.bin: DOS/MBR boot sector
In case GRUB2 is used default payload, add the x86-bootable memtest.bin to your ROM image with
$ cbfstool coreboot.rom add -f memtest.bin -n memtest.bin -t raw
and add the following entry to your grub.cfg:
menuentry 'MemTest86+ 5.01' {
set root='cbfsdisk'
linux16 /memtest.bin
}
Alternatively one can also load it directly from disk, e.g. by placing it under /boot/memtest.bin and adjusting the menuentry accordingly:
search -n --set=root -f /boot/memtest.bin