From: Hollis Blanchard <hollis@penguinppc.org>
To: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Cc: linuxppc-dev list <Linuxppc-dev@ozlabs.org>,
Torez Smith <torez@us.ibm.com>
Subject: Re: [RFC: PATCH 08/13] powerpc/476: define specific cpu table entry for DD1 and DD1.1 cores
Date: Thu, 4 Mar 2010 09:06:40 -0800 [thread overview]
Message-ID: <fb412d761003040906i57842fc3t48693d5e5e777176@mail.gmail.com> (raw)
In-Reply-To: <20100301191351.20987.49730.sendpatchset@norville.austin.ibm.com>
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On Mon, Mar 1, 2010 at 11:13 AM, Dave Kleikamp <shaggy@linux.vnet.ibm.com>wrote:
> powerpc/476: define specific cpu table entry for DD1 and DD1.1 cores
>
> From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
>
> There are still some unstable bits on the DD1 and DD1.1 cores. Don't use
> the FPU or the tlbivax operation. Define CPU_FTR_476_DD1 and
> CPU_FTR_476_DD1_1 for additional workarounds in later patches.
>
> The DD1 core requires workarounds triggered by both CPU_FTR_476_DD1
> and CPU_FTR_476_DD1_1. the DD1.1 core only needs CPU_FTR_476_DD1_1
> defined.
>
> Isn't the policy generally not to commit workarounds for early/errataful
hardware which will not be seen in the real world? Otherwise, every new
half-broken core could burn a bunch of feature bits...
-Hollis
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next prev parent reply other threads:[~2010-03-04 17:06 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-01 19:12 [RFC: PATCH 00/13] powerpc/47x: Support for 476 core Dave Kleikamp
2010-03-01 12:13 ` [RFC: PATCH 04/13] powerpc/476: add machine check handler for 47x core Dave Kleikamp
2010-03-01 21:08 ` Olof Johansson
2010-03-01 23:22 ` Dave Kleikamp
2010-03-01 19:13 ` [RFC: PATCH 01/13] powerpc/booke: Add Stack Marking support to Booke Exception Prolog Dave Kleikamp
2010-03-02 14:50 ` Kumar Gala
2010-03-02 15:09 ` Dave Kleikamp
2010-03-01 19:13 ` [RFC: PATCH 02/13] powerpc/44x: break out cpu init code into stand-alone function Dave Kleikamp
2010-03-01 19:13 ` [RFC: PATCH 03/13] powerpc/47x: Base ppc476 support Dave Kleikamp
2010-03-01 20:19 ` Josh Boyer
2010-03-01 23:11 ` Dave Kleikamp
2010-03-02 0:47 ` Josh Boyer
2010-03-01 19:13 ` [RFC: PATCH 05/13] powerpc/476: Add isync after loading mmu and debug spr's Dave Kleikamp
2010-03-01 19:13 ` [RFC: PATCH 07/13] powerpc/47x: defconfig for 476 on the iss 4xx simulator Dave Kleikamp
2010-03-01 19:13 ` [RFC: PATCH 08/13] powerpc/476: define specific cpu table entry for DD1 and DD1.1 cores Dave Kleikamp
2010-03-01 20:24 ` Josh Boyer
2010-03-01 23:43 ` Dave Kleikamp
2010-03-04 17:06 ` Hollis Blanchard [this message]
2010-03-05 9:15 ` Kumar Gala
2010-03-05 13:18 ` Dave Kleikamp
2010-03-01 19:13 ` [RFC: PATCH 09/13] powerpc/476: Workaround for dcbf/dcbz workaround on DD1 Dave Kleikamp
2010-03-01 19:14 ` [RFC: PATCH 10/13] powerpc/476: Add isync to the top of all exception handlers for DD1.1 core Dave Kleikamp
2010-03-01 19:14 ` [RFC: PATCH 11/13] powerpc/476: Software workaround to fix dcr read/write sequencing Dave Kleikamp
2010-03-01 19:14 ` [RFC: PATCH 12/13] powerpc/476: Workaround for DD1.1: Issue lwsync after mtpid Dave Kleikamp
2010-03-01 19:14 ` [RFC: PATCH 13/13] powerpc/476: Add dci instruction to async interrupt handlers on DD1 core Dave Kleikamp
2010-03-01 19:16 ` [RFC: PATCH 06/13] powerpc/4xx: Simple platform for the ISS 4xx simulator Dave Kleikamp
2010-03-01 20:29 ` Josh Boyer
2010-03-01 23:33 ` Dave Kleikamp
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