On Wed, Feb 19, 2025 at 11:43:29AM +0100, Marco Felsch wrote: > Hi Sascha, > > On 25-02-18, Sascha Hauer wrote: > > Some i.MX6 configurations use the xload mechanism. With this the ROM > > only loads and verifies the PBL. The PBL will then load barebox proper. > > Without verification the barebox proper binary is untrusted and could be > > modified. Select PBL_VERIFY_PIGGY when HABV4 is enabled to ensure the > > barebox proper binary has not been tempered with. > > > > boards not using the xload mechanism don't need this option, but there > > is no good way to detect currently if the xload mechanism is used, so > > these boards will have to live with a slightly increased binary size > > for now. > > I hav no objections but do you have numbers? There are many i.MX6 based > systems which do use a spi-nor with limited amount of space already > facing size issues since barebox is becoming bigger and bigger. Enabling PBL_VERIFY_PIGGY increases the PBL by about ~6k on ARM/ARM64. We could add the select to MCI_IMX_ESDHC_PBL instead. The SPI xload code doesn't have a corresponding Kconfig symbol though, so we would have to add that first. Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
