On 13 March 2018 at 07:47, Hans de Goede <hdego...@redhat.com> 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?