Re: PS3 platform is broken on Linux 3.7.0

Hi,

On Thu, 2012-12-20 at 08:53 +1100, Benjamin Herrenschmidt wrote:

On Fri, 2012-12-14 at 16:35 +0400, Phileas Fogg wrote:

quoted

Hi,

I wanted to bring to your attention the fact that the PS3 platform is broken on Linux 3.7.0.

i'm not able to boot Linux 3.7.0 on my PS3 slim. Linux 3.6.10 boots just fine but not 3.7.0
When i try to boot Linux 3.7.0 then my PS3  shuts down.

So i cloned the Linux powerpc GIT repository and tried to find out which commits broke the PS3 platform.
After some time I tracked it down to 2 commits:

Aneesh, do you have any idea what might be going on there ? Can you look
at the PS3 hash code ? It's a bit different from the rest, you might
have missed an update or two...

Michael, same deal with PACA...

I checked these, and Michael's 407821a34fce89b4f0b031dbab5cec7d059f46bc
does indeed cause the LV1 hypervisor to panic early, and if that is
reverted, Aneesh's 048ee0993ec8360abb0b51bdf8f8721e9ed62ec4 hits a BUG.

I'll look at it some more next week.

-Geoff

quoted

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commit 407821a34fce89b4f0b031dbab5cec7d059f46bc
Author: Michael Ellerman [off-list ref]
Date:   Fri Sep 7 15:31:44 2012 +0000

    powerpc: Initialise paca.data_offset with poison
    
    It's possible for the cpu_possible_mask to change between the time we
    initialise the pacas and the time we setup per_cpu areas.
    
    Obviously impossible cpus shouldn't ever be running, but stranger things
    have happened. So be paranoid and initialise data_offset with a poison
    value in case we don't set it up later.
    
    Based on a patch from Anton Blanchard.
    
    Signed-off-by: Michael Ellerman [off-list ref]
    Signed-off-by: Benjamin Herrenschmidt [off-list ref]


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commit 048ee0993ec8360abb0b51bdf8f8721e9ed62ec4
Author: Aneesh Kumar K.V [off-list ref]
Date:   Mon Sep 10 02:52:55 2012 +0000

    powerpc/mm: Add 64TB support
    
    Increase max addressable range to 64TB. This is not tested on
    real hardware yet.
    
    Reviewed-by: Paul Mackerras [off-list ref]
    Signed-off-by: Aneesh Kumar K.V [off-list ref]
    Signed-off-by: Benjamin Herrenschmidt [off-list ref]

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