From: "Gerhard Pircher" <gerhard_pircher@gmx.net>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@ozlabs.org, kumar.gala@freescale.com, paulus@samba.org
Subject: Re: [PATCH 9/10] powerpc/mm: Rework usage of _PAGE_COHERENT/NO_CACHE/GUARDED v2
Date: Sun, 18 Jan 2009 21:29:43 +0100 [thread overview]
Message-ID: <20090118202943.85450@gmx.net> (raw)
In-Reply-To: <1232308506.23611.43.camel@pasglop>
-------- Original-Nachricht --------
> Datum: Mon, 19 Jan 2009 06:55:06 +1100
> Von: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> An: Gerhard Pircher <gerhard_pircher@gmx.net>
> CC: paulus@samba.org, kumar.gala@freescale.com, linuxppc-dev@ozlabs.org
> Betreff: Re: [PATCH 9/10] powerpc/mm: Rework usage of _PAGE_COHERENT/NO_CACHE/GUARDED v2
> On Sun, 2009-01-18 at 20:43 +0100, Gerhard Pircher wrote:
> > I'm pretty sure that the hack for setup_32.c above protects this code in hash_low_32.S/
> > create_hpte() from being overwritten with nops. But I wonder which other paths exists
> > in the memory management code to set the coherent flag in PTEs? Any ideas how I
> > can get it to work without removing _PAGE_COHERENT from _PAGE_BASE?
>
> I'll have a look, could be something with the BAT setup too, and I
> haven't modified the 603 code, are you using a 603 ?
No, it's a 7455 (which has CPU_FTR_NEED_COHERENT set in its CPU features).
Thanks!
Gerhard
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next prev parent reply other threads:[~2009-01-18 20:29 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-19 5:13 [PATCH 0/10] powerpc: Preliminary work to enable SMP BookE (v3) Benjamin Herrenschmidt
2008-12-19 5:13 ` [PATCH 1/10] powerpc/4xx: Extended DCR support v2 Benjamin Herrenschmidt
2008-12-19 12:36 ` Josh Boyer
2008-12-19 5:13 ` [PATCH 2/10] powerpc/mm: Split mmu_context handling v3 Benjamin Herrenschmidt
2008-12-19 5:13 ` [PATCH 3/10] powerpc/mm: Rework context management for CPUs with no hash table v2 Benjamin Herrenschmidt
2008-12-19 5:13 ` [PATCH 4/10] powerpc/mm: Introduce MMU features v3 Benjamin Herrenschmidt
2008-12-19 5:13 ` [PATCH 5/10] powerpc/mm: Add SMP support to no-hash TLB handling v5 Benjamin Herrenschmidt
2008-12-19 5:13 ` [PATCH 6/10] powerpc/mm: Split low level tlb invalidate for nohash processors Benjamin Herrenschmidt
2008-12-19 5:13 ` [PATCH 7/10] powerpc/44x: No need to mask MSR:CE, ME or DE in _tlbil_va on 440 Benjamin Herrenschmidt
2008-12-19 12:37 ` [PATCH 7/10] powerpc/44x: No need to mask MSR:CE,ME " Josh Boyer
2008-12-19 5:13 ` [PATCH 8/10] powerpc/mm: Runtime allocation of mmu context maps for nohash CPUs v2 Benjamin Herrenschmidt
2008-12-19 5:13 ` [PATCH 9/10] powerpc/mm: Rework usage of _PAGE_COHERENT/NO_CACHE/GUARDED v2 Benjamin Herrenschmidt
2009-01-18 19:43 ` Gerhard Pircher
2009-01-18 19:55 ` Benjamin Herrenschmidt
2009-01-18 20:29 ` Gerhard Pircher [this message]
2009-01-23 16:51 ` [PATCH] powerpc/mm: Fix handling of _PAGE_COHERENT in BAT setup code Gerhard Pircher
2008-12-19 5:13 ` [PATCH 10/10] powerpc/44x: 44x TLB doesn't need "Guarded" set for all pages Benjamin Herrenschmidt
2008-12-19 12:38 ` Josh Boyer
2008-12-19 16:05 ` [PATCH 0/10] powerpc: Preliminary work to enable SMP BookE (v3) Kumar Gala
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