Hi All,
I compiled the latest git version of kernel 4.7 with all PowerPC
commits. Maybe the latest commit powerpc-4.7-2 solved the boot issues.
Our latest Nemo patch 4.7-1 works without any problems with the latest
git version.
I got the following error message:
arch/powerpc/kernel/pci-common.c: In function
‘pci_process_bridge_OF_ranges’:
arch/powerpc/kernel/pci-common.c:732:59: error: ‘_PAGE_GUARDED’
undeclared (first use in this function)
range.size, _PAGE_NO_CACHE|_PAGE_GUARDED);
^
arch/powerpc/kernel/pci-common.c:732:59: note: each undeclared
identifier is reported only once for each function it appears in
make[1]: *** [arch/powerpc/kernel/pci-common.o] Error 1
make: *** [arch/powerpc/kernel] Error 2
I replaced
__ioremap_at(range.cpu_addr, (void *)ISA_IO_BASE,
range.size, _PAGE_NO_CACHE|_PAGE_GUARDED);
with
__ioremap_at(range.cpu_addr, (void *)ISA_IO_BASE,
range.size,
pgprot_val(pgprot_noncached(__pgprot(0))));
After that it compiled.
Unfortunately it doesn't boot. :-(
Which files are responsible for the early boot phase in the commit
powerpc-4.7-1? Perhaps the problem is there.
Cheers,
Christian
On 04 June 2016 at 09:40 AM, Christian Zigotzky wrote:
Aneesh,
Could you please send me only your patch for the Power ISA 3.0
(Power9) Radix Tree MMU? You have done the most modifications for the
kernel 4.7. If the kernel boots with your modifications then I have to
look to the other few modifications.
Thanks in advance,
Christian
On 04 June 2016 at 09:19 AM, Christian Zigotzky wrote:
Hi All,
The commit powerpc-4.7-2 [2] was released yesterday.
There is a conflict in my local kernel git directory if I use git
pull because I have reverted the commit powerpc-4.7-1. [1]
The commit powerpc-4.7-2 [2] needs the commit powerpc-4.7-1. [1]
I created a new local kernel git directory for the RC2 with:
git clone
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
linux-git-without-powerpc-commits
After that I reverted the two commits:
powerpc-4.7-2 [2]:
git revert 5306d766f15e72bc79c61d88f77e5a6b1fcc0e68 -m 1
powerpc-4.7-1 [1]:
git revert c04a5880299eab3da8c10547db96ea9cdffd44a6 -m 1
Afterwards I successfully tested our latest Nemo patch 4.7-1 [3] with
the following commands:
cp -R linux-git-without-powerpc-commits linux-4.7
patch -p0 < nemo_4.7-1.patch
I tried to solve the boot issue last week. I modified the code a lot
and I replaced some files. Unfortunately without any success. The RC1
without the commit powerpc-4.7-1 [1] boots and works fantastic. I
don't have any ideas anymore. Please help me to solve the boot problems.
Thanks in advance,
Christian
[1]
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c04a5880299eab3da8c10547db96ea9cdffd44a6
[2]
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5306d766f15e72bc79c61d88f77e5a6b1fcc0e68
[3] http://www.xenosoft.de/nemo_4.7-1.patch
On 28 May 2016 at 8:51 PM, Darren Stevens wrote:
Hello Adrian
On 28/05/2016, Adrian Cox wrote:
From: Christian Zigotzky [mailto:chzigot...@xenosoft.de]
Sent: 28 May 2016 07:06
Adrian, what is the expected WIMG bit mapping for the Nemo board?
I'm not able to help much here, I'm afraid. I don't have a Nemo
board at
the moment, and it's been a few years. From memory all the peripherals
required standard uncached and guarded mappings on Nemo.
Before everybody gets too involved, from what I've seen with my
tests today
the kernel is crashing long before it gets to the pci-common code.
I've attached 2 boot logs, one from a 4.4 kernel I've been working
on, and
from a build of the latest git.
You can see from this that the 4.7 kernel hangs right after the
booting linux
via __start(), whereas in the 4.4 there's about 29 lines of output
before it
gets to the Initialised io_base_virt printk in our patch.
The last time we had a hang this early in the boot it turned out to
be a
problem in head_64.S, I think there is something else wrong in the
commit
Christian has identified
I will see if this is something I can fix, but it may need better
low level
knowledge of PPC hardware than I have.
Regards
Darren
On 28 May 2016 at 6:53 PM, Adrian Cox wrote:
From: Christian Zigotzky [mailto:chzigot...@xenosoft.de]
Sent: 28 May 2016 07:06
Adrian, what is the expected WIMG bit mapping for the Nemo board?
I'm not able to help much here, I'm afraid. I don't have a Nemo
board at the moment, and it's been a few years. From memory all the
peripherals required standard uncached and guarded mappings on Nemo.
The difficult bit that usually breaks on kernel upgrades is not the
WIMG settings, but the PCI probing routine. The SB600 doesn't
follow normal PCIe address decoding rules, as in its original use as
an AMD south bridge it was designed to appear as if it were
integrated into the north bridge.
--
Adrian
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