From: Willy Tarreau <w@1wt.eu>
To: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Cc: Scott Wood <scottwood@freescale.com>,
linuxppc-dev <linuxppc-dev@ozlabs.org>
Subject: Re: [PATCH 00/13] powerpc: Backport 8xx TLB to 2.4
Date: Tue, 11 Jan 2011 07:09:26 +0100 [thread overview]
Message-ID: <20110111060926.GE16301@1wt.eu> (raw)
In-Reply-To: <1294695479-344-1-git-send-email-Joakim.Tjernlund@transmode.se>
Hi Joakim,
On Mon, Jan 10, 2011 at 10:37:46PM +0100, Joakim Tjernlund wrote:
> This is a backport from 2.6 which I did to overcome 8xx CPU
> bugs. 8xx does not update the DAR register when taking a TLB
> error caused by dcbX and icbi insns which makes it very
> tricky to use these insns. Also the dcbst wrongly sets the
> the store bit when faulting into DTLB error.
> A few more bugs very found during development.
>
> I know 2.4 is in strict maintenance mode and 8xx is obsolete
> but as it is still in use I wanted 8xx to age with grace.
Thank you very much for taking care of this, that's very much appreciated.
I'll look at this ASAP. Just a quick question in order to be certain, did
you have the opportunity to test all of these changes on real hardware ?
Thanks,
Willy
next prev parent reply other threads:[~2011-01-11 6:22 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-10 21:37 [PATCH 00/13] powerpc: Backport 8xx TLB to 2.4 Joakim Tjernlund
2011-01-10 21:37 ` [PATCH 01/13] 8xx: Use a macro to simpliy CPU6 errata code Joakim Tjernlund
2011-01-10 21:37 ` [PATCH 02/13] 8xx: Tag DAR with 0x00f0 to catch buggy instructions Joakim Tjernlund
2011-01-10 21:37 ` [PATCH 03/13] 8xx: invalidate non present TLBs Joakim Tjernlund
2011-01-10 21:37 ` [PATCH 04/13] 8xx: Fix CONFIG_PIN_TLB Joakim Tjernlund
2011-01-10 21:37 ` [PATCH 05/13] 8xx: Update TLB asm so it behaves as linux mm expects Joakim Tjernlund
2011-01-10 21:37 ` [PATCH 06/13] 8xx: Always pin kernel instruction TLB Joakim Tjernlund
2011-01-10 21:37 ` [PATCH 07/13] 8xx: Fixup DAR from buggy dcbX instructions Joakim Tjernlund
2011-01-10 21:37 ` [PATCH 08/13] 8xx: CPU6 errata make DTLB error too big to fit Joakim Tjernlund
2011-01-10 21:37 ` [PATCH 09/13] 8xx: Add missing Guarded setting in DTLB Error Joakim Tjernlund
2011-01-10 21:37 ` [PATCH 10/13] 8xx: Restore _PAGE_WRITETHRU Joakim Tjernlund
2011-01-10 21:37 ` [PATCH 11/13] 8xx: start using dcbX instructions in various copy routines Joakim Tjernlund
2011-01-10 21:37 ` [PATCH 12/13] 8xx: Optimize ITLBMiss handler Joakim Tjernlund
2011-01-10 21:37 ` [PATCH 13/13] 8xx: Optimize TLB Miss handlers Joakim Tjernlund
2011-01-11 6:09 ` Willy Tarreau [this message]
2011-01-11 8:12 ` [PATCH 00/13] powerpc: Backport 8xx TLB to 2.4 Joakim Tjernlund
2011-01-11 20:08 ` Willy Tarreau
2011-01-11 20:27 ` Joakim Tjernlund
[not found] ` <OFEC114402.5A694921-ONC1257815.002CC8F2-C1257815.002D1C7D@LocalDomain>
2011-01-11 10:56 ` Joakim Tjernlund
2011-01-13 20:44 ` Scott Wood
2011-01-13 21:31 ` Joakim Tjernlund
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