On Sat, 2007-09-29 at 23:49 +0200, Carl-Daniel Hailfinger wrote: > On 12.09.2007 21:37, Alex Beregszaszi wrote: > > Hi, > > > > On Fri, 2007-09-07 at 12:54 +0200, Alex Beregszaszi wrote: > >> Hi, > >> > >> On Wed, 2007-09-05 at 04:29 +0200, Stefan Reinauer wrote: > >>> * Alex Beregszaszi <[EMAIL PROTECTED]> [070904 13:17]: > >>>> Hi, > >>>> > >>>> the attached patch adds code to checksum the pci extension rom and stop > >>>> if the stored and calculated checksum differ. > >>> Is this checksum reliably correct? I am hesitating to add new > >>> restrictions that might break otherwise working cards. > >> You are right, attached is a correct method. There is no fixed checksum > >> byte, instead the whole should sum to zero. > > > > Any comments on this? > > I like it. I'd give you an Ack, but I have no hardware to test with. > > Stefan? Ron? > > Worst case would be that buggy extension ROMs break with a really loud > warning, so anybody with such ROMs will see it prominently in the logs. > > Alex: Is there an easy way to check extension ROMs in the current > machine for correct signatures? Maybe standalone utility or such stuff.
There is no utility for that, but you could copy out the memory between 0xc0000 - 0xf00000 from /dev/mem and search for extension headers in it (see the code in pci_rom.c). -- Alex -- linuxbios mailing list linuxbios@linuxbios.org http://www.linuxbios.org/mailman/listinfo/linuxbios
