On 13 March 2018 at 13:41, Jeremy Cline <jeremy@xxxxxxxxxx> wrote: > On 03/13/2018 03:59 AM, Ard Biesheuvel wrote: >> On 13 March 2018 at 07:47, Hans de Goede <hdegoede@xxxxxxxxxx> wrote: >>> Hi, >>> >>> >>> On 12-03-18 20:55, Thiebaud Weksteen wrote: >>>> >> ... >>>> >>>> Hans, you said you configured the tablet to use the 32-bit version of grub >>>> instead >>>> of 64. Why's that? >>> >>> >>> Because this tablet, like (almost?) all Bay Trail hardware has a 32 bit >>> UEFI, >>> even though the processor is 64 bit capable (AFAIK 64 bit Windows drivers >>> were >>> not ready in time so all Bay Trail devices shipped with a 32 bit Windows). >>> >>> So this is running a 32 bit grub which boots a 64 bit kernel. >>> >>>> Jeremy, could you confirm if you are building the kernel in 64bit mode? Is >>>> your Android install working? (that is, what happens if you boot >>>> Boot0000)? >>> >>> >>> AFAIK the kernel on Jeremy's tablet (which I initially installed) is 64 bit. >>> >>> Could the problem perhaps be that the new code for the TPM event-log is >>> missing some handling to deal with running on a 32 bit firmware? I know the >>> rest of the kernel has special code to deal with this. >>> >> >> That is a very good point, and I missed that this is a 64-bit kernel >> running on 32-bit UEFI. >> >> The TPM code does use efi_call_proto() directly, and now I am thinking >> it is perhaps the allocate_pages() call that simply only initializes >> the low 32-bits of log_tbl. >> >> Jeremy, could you please try initializing tcg2_protocol and log_tbl to >> NULL at the start of the function? >> > > That was it, it boots when those are initialized to NULL. > Thanks for confirming. I'll send out a patch. -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
