[coreboot] Re: Installing Core Boot on a Lenovo X230 with a script.
On 2/21/20 9:16 PM, Matt DeVillier wrote: if you want to disable the ME [...], hardware flashing is mandatory). You can also disable ME without external flashing with this patch: https://review.coreboot.org/c/coreboot/+/37115 It will not unlock FD and you can't use more space for coreboot, though. ___ coreboot mailing list -- coreboot@coreboot.org To unsubscribe send an email to coreboot-le...@coreboot.org
[coreboot] Re: Installing Core Boot on a Lenovo X230 with a script.
On Fri, Feb 21, 2020 at 12:25 PM Nico Huber wrote: > > On 21.02.20 19:16, Matt DeVillier wrote: > > The x230 requires exploiting a vulnerability in an older UEFI version > > in order to be flashed without external hardware (and even so, is > > limited to flashing the 4MB BIOS region only; if you want to disable > > the ME and use more space for the BIOS region, hardware flashing is > > mandatory). See: https://github.com/n4ru/1vyrain/ > > Actually, 7MiB BIOS region. And there is a guide for the procedure > upstream now [1]. It's not easy and nothing one could/should do with > a script, though. looks like the 4MB limitation is an 1vyrain thing then, I just scanned the link :) > > Nico > > [1] https://doc.coreboot.org/mainboard/lenovo/ivb_internal_flashing.html ___ coreboot mailing list -- coreboot@coreboot.org To unsubscribe send an email to coreboot-le...@coreboot.org
[coreboot] Re: Installing Core Boot on a Lenovo X230 with a script.
On 21.02.20 19:16, Matt DeVillier wrote: > The x230 requires exploiting a vulnerability in an older UEFI version > in order to be flashed without external hardware (and even so, is > limited to flashing the 4MB BIOS region only; if you want to disable > the ME and use more space for the BIOS region, hardware flashing is > mandatory). See: https://github.com/n4ru/1vyrain/ Actually, 7MiB BIOS region. And there is a guide for the procedure upstream now [1]. It's not easy and nothing one could/should do with a script, though. Nico [1] https://doc.coreboot.org/mainboard/lenovo/ivb_internal_flashing.html ___ coreboot mailing list -- coreboot@coreboot.org To unsubscribe send an email to coreboot-le...@coreboot.org
[coreboot] Re: Installing Core Boot on a Lenovo X230 with a script.
Chromebooks are flashable from a live system because their firmware doesn't software lock the BIOS region as part of the boot process, like all properly implemented UEFI firmware should; instead they a combination of a hardware (jumper/screw/CR50) and software (SPI flash chip registers) locks which provide security as well as the ability to be modified by the physical owner of the device. The x230 requires exploiting a vulnerability in an older UEFI version in order to be flashed without external hardware (and even so, is limited to flashing the 4MB BIOS region only; if you want to disable the ME and use more space for the BIOS region, hardware flashing is mandatory). See: https://github.com/n4ru/1vyrain/ On Fri, Feb 21, 2020 at 11:45 AM pk wrote: > > Mr Chromebox uses a script to install Core Boot onto Chrome Book without > opening the laptop, or attaching a PROM; (CH341a, Ponoma 5250 Test Clip, F to > F Breadboard Jumper Cables.) > > Is using a Script without using hardware PROM, and so on, like Mr. Chromebox > does with a Chrome Book? > > Thanks for what you are doing. and for your replies. > > ___ > coreboot mailing list -- coreboot@coreboot.org > To unsubscribe send an email to coreboot-le...@coreboot.org ___ coreboot mailing list -- coreboot@coreboot.org To unsubscribe send an email to coreboot-le...@coreboot.org
