Le 21/11/2017 à 03:28, Balbir Singh a écrit :
On Sun, Nov 19, 2017 at 1:36 AM, LEROY Christophe
<christophe.le...@c-s.fr> wrote:
Meelis Roos <mr...@linux.ee> a écrit :
How early does it hang ? Any oops or trace ?
Very early - instead oif kernel emssages, I see some repeated gibberish
of some characteers, and the background turns white.
I am booting from yaboot, background is normally black.
Ok, could you try by replacing #ifdef CONFIG_STRICT_KERNEL_RWX by #if 0
in arch/powerpc/lib/code-patching.c
With this change and CONFIG_STRICT_KERNEL_RWX=y, it still boots.
BTW, I get these warnings (sorry for the word wrap from screen paste) -
may they be related or rather not?
WRAP arch/powerpc/boot/zImage.pmac
WRAP arch/powerpc/boot/zImage.coff
WRAP arch/powerpc/boot/zImage.miboot
INFO: Uncompressed kernel (size 0x5d4c3c) overlaps the address of the
wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x600000)
Then i believe there is something wrong with commit
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=next-20171115&id=37bc3e5fd764fb258ff4fcbb90b6d1b67fb466c1
Balbir, do you have any idea ?
Hmm.. interesting, so nobats works, but code-patching has issues? Any
chance you can boot with xmon=on on the command line
when you drop into the xmon> prompt, type dl to get the kernel log.
I have the same issue with a 83xx board allthought it is booting well on
my 8xx boards.
Indeed the issue is that patch_instruction() is called from
early_init(), therefor all static data must be addressed using PTRRELOC()
I have submitted a fixup patch, can you review it ?
slab_is_available() cannot be called that early for the same reason but
I believe it is not needed.
Christophe
Balbir Singh.
