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Date: Sun, 10 Mar 2013 11:53:53 +0100
From: Phileas Fogg <phileas-fogg@mail.ru>
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To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: Linux kernel 3.x problems on PowerMac G5
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Cc: Andreas Schwab <schwab@linux-m68k.org>, Denis Kirjanov <kirjanov@gmail.com>,
 linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
 Aaro Koskinen <aaro.koskinen@iki.fi>
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Good news :) I found the bug.
MMU features were not set properly for PPC970MP DD1.0 which,
unfortunately, my machine has.
Damn, one line fix but one week searching.
Linux 3.8.2 boots without problems now :)


Here is my patch:

--- arch/powerpc/kernel/cputable.c.old	2013-03-10 11:48:56.559480758 +0100
+++ arch/powerpc/kernel/cputable.c	2013-03-10 11:41:07.522786804 +0100
@@ -275,7 +275,7 @@
  		.cpu_features		= CPU_FTRS_PPC970,
  		.cpu_user_features	= COMMON_USER_POWER4 |
  			PPC_FEATURE_HAS_ALTIVEC_COMP,
-		.mmu_features		= MMU_FTR_HPTE_TABLE,
+		.mmu_features		= MMU_FTRS_PPC970,
  		.icache_bsize		= 128,
  		.dcache_bsize		= 128,
  		.num_pmcs		= 8,



Regards