From: Tabi Timur-B04825 <B04825@freescale.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Wood Scott-B07421 <B07421@freescale.com>,
Baruch Siach <baruch@tkos.co.il>,
Sonny Rao <sonnyrao@linux.vnet.ibm.com>,
Tabi Timur-B04825 <B04825@freescale.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Paul Gortmaker <paul.gortmaker@windriver.com>,
Paul Mackerras <paulus@samba.org>,
"Moffett, Kyle D" <Kyle.D.Moffett@boeing.com>,
Anatolij Gustschin <agust@denx.de>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
Paul Bolle <pebolle@tiscali.nl>
Subject: Re: [RFC PATCH 02/17] powerpc: Split up PHYS_64BIT config option to fix "select" issues
Date: Fri, 11 Nov 2011 13:12:31 +0000 [thread overview]
Message-ID: <4EBD1F3E.2040402@freescale.com> (raw)
In-Reply-To: <1320987054.21206.55.camel@pasglop>
Benjamin Herrenschmidt wrote:
> For PHYS_64BIT, I'm not 100% certain at this point what the best
> approach it. It should clearly be fixed and hidden for real 64-bit. As
> for the rest, should it be user selectable ?
I have been unable to convince our BSP teams that the minor performance=20
improvement of a 32-bit kernel vs 36-bit is not worth the hassle. We ship=
=20
a lot of lower-end e500 systems that will never have more than 2GB of memor=
y.
The P1022DS is an example. We ship 32-bit and 36-bit versions of U-Boot,=20
the kernel, and the device tree. I recently added code to U-boot to=20
detect if you have a mismatched U-Boot and device tree, because it is so=20
easy to mess that up. I would like nothing more than to abandon 32-bit=20
for all e500, but I don't see Freescale allowing that any time soon.
--=20
Timur Tabi
Linux kernel developer at Freescale=
next prev parent reply other threads:[~2011-11-11 13:12 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-20 4:56 [RFC PATCH] powerpc: 85xx: Make e500/e500v2 depend on !E500MC Baruch Siach
2011-07-12 4:15 ` Baruch Siach
2011-07-28 19:56 ` Tabi Timur-B04825
2011-07-28 20:02 ` Timur Tabi
2011-08-01 5:02 ` Baruch Siach
2011-07-28 20:20 ` Scott Wood
2011-08-01 4:59 ` Baruch Siach
2011-08-01 5:12 ` [PATCH] powerpc: 85xx: separate e500 from e500mc Baruch Siach
2011-08-08 9:07 ` [PATCH v2] " Baruch Siach
2011-08-08 19:42 ` Scott Wood
2011-08-10 4:43 ` Baruch Siach
2011-08-10 5:21 ` [PATCH v3] " Baruch Siach
2011-08-10 15:39 ` Paul Gortmaker
2011-08-10 16:01 ` Scott Wood
2011-08-10 16:40 ` Paul Gortmaker
2011-11-10 0:03 ` [RFC PATCH 00/17] powerpc/e500: " Kyle Moffett
2011-11-10 13:59 ` Kumar Gala
2011-11-10 16:17 ` Moffett, Kyle D
2011-11-10 16:30 ` Kumar Gala
2011-11-10 16:54 ` Scott Wood
2011-11-11 0:38 ` Moffett, Kyle D
2011-11-11 4:40 ` Benjamin Herrenschmidt
2011-11-15 2:32 ` [RFC PATCH 0/2] powerpc: CPU cache op cleanup Kyle Moffett
2011-11-15 22:29 ` Benjamin Herrenschmidt
2011-11-15 22:45 ` Moffett, Kyle D
2011-11-15 23:46 ` Benjamin Herrenschmidt
2011-11-16 0:25 ` Moffett, Kyle D
2011-11-16 4:40 ` Paul Mackerras
2011-11-16 20:52 ` Moffett, Kyle D
2011-11-15 2:32 ` [RFC PATCH 1/2] powerpc: Remove duplicate cacheable_memcpy/memzero functions Kyle Moffett
2011-11-15 22:31 ` Benjamin Herrenschmidt
2011-11-15 2:32 ` [RFC PATCH 2/2] WIP: PowerPC cache cleanup Kyle Moffett
2011-11-15 2:36 ` [RFC PATCH 00/17] powerpc/e500: separate e500 from e500mc Moffett, Kyle D
2011-11-15 2:41 ` Tabi Timur-B04825
2011-11-15 3:40 ` Kyle Moffett
2011-11-15 22:41 ` Benjamin Herrenschmidt
2011-11-10 0:06 ` Kyle Moffett
2011-11-10 0:06 ` [RFC PATCH 01/17] powerpc/mpic: Fix bogus CONFIG_BOOKE conditional Kyle Moffett
2011-11-10 13:33 ` Kumar Gala
2011-11-10 0:07 ` [RFC PATCH 02/17] powerpc: Split up PHYS_64BIT config option to fix "select" issues Kyle Moffett
2011-11-10 13:36 ` Kumar Gala
2011-11-10 14:04 ` Timur Tabi
2011-11-10 16:31 ` Moffett, Kyle D
2011-11-10 16:50 ` Timur Tabi
2011-11-11 4:50 ` Benjamin Herrenschmidt
2011-11-11 13:12 ` Tabi Timur-B04825 [this message]
2011-11-10 0:07 ` [RFC PATCH 03/17] fsl_rio: Remove FreeScale e500 conditionals Kyle Moffett
2011-11-10 0:07 ` [RFC PATCH 04/17] powerpc: Allow multiple machine-check handlers Kyle Moffett
2011-11-10 13:37 ` Kumar Gala
2011-11-10 16:33 ` Moffett, Kyle D
2011-11-10 0:07 ` [RFC PATCH 05/17] powerpc/e500: Remove unused "default e500" from CPU table Kyle Moffett
2011-11-10 0:07 ` [RFC PATCH 06/17] powerpc/e500: Split FreeScale e500v1/v2 and e500mc config options Kyle Moffett
2011-11-10 0:07 ` [RFC PATCH 07/17] powerpc/e200: Rename CONFIG_E200 => CONFIG_FSL_E200 Kyle Moffett
2011-11-10 0:07 ` [RFC PATCH 08/17] powerpc/e500: Remove conditional "lwsync" substitution Kyle Moffett
2011-11-10 13:40 ` Kumar Gala
2011-11-10 16:31 ` Scott Wood
2011-11-10 16:42 ` Kumar Gala
2011-11-10 17:03 ` Scott Wood
2011-11-10 20:27 ` Moffett, Kyle D
2011-11-10 20:34 ` Kumar Gala
2011-11-11 4:45 ` Benjamin Herrenschmidt
2011-11-11 4:43 ` Benjamin Herrenschmidt
2011-11-10 0:07 ` [RFC PATCH 09/17] powerpc/e500: Split idle handlers for e500v1/v2 and e500mc Kyle Moffett
2011-11-10 0:07 ` [RFC PATCH 10/17] powerpc/e500: Fix up the last references to CONFIG_PPC_E500MC Kyle Moffett
2011-11-10 0:07 ` [RFC PATCH 11/17] powerpc/e500: Use the correct assembler flags for e500mc and e5500 Kyle Moffett
2011-11-10 0:07 ` [RFC PATCH 12/17] powerpc/e500: Separate e500mc CPU table entries from e500v1/e500v2 Kyle Moffett
2011-11-10 0:07 ` [RFC PATCH 13/17] powerpc/e500: Add a new CONFIG_FSL_E5500 option for the e5500 Kyle Moffett
2011-11-10 13:46 ` Kumar Gala
2011-11-10 16:49 ` Scott Wood
2011-11-10 0:07 ` [RFC PATCH 14/17] powerpc/e500: Don't make kgdb use e500v1/e500v2 registers on e500mc Kyle Moffett
2011-11-10 16:46 ` Scott Wood
2011-11-10 0:07 ` [RFC PATCH 15/17] powerpc/e500: Fix up all remaining code uses of CONFIG_E500 Kyle Moffett
2011-11-10 0:07 ` [RFC PATCH 16/17] powerpc/e500: Make __setup_cpu_{e200, e500, e500mc, e5500} optional Kyle Moffett
2011-11-10 16:47 ` [RFC PATCH 16/17] powerpc/e500: Make __setup_cpu_{e200,e500,e500mc,e5500} optional Scott Wood
2011-11-10 18:52 ` [RFC PATCH 16/17] powerpc/e500: Make __setup_cpu_{e200, e500, e500mc, e5500} optional Kumar Gala
2011-11-10 0:07 ` [RFC PATCH 17/17] powerpc/e500: Finally remove "CONFIG_E500" Kyle Moffett
2011-10-24 6:00 ` [PATCH v3] powerpc: 85xx: separate e500 from e500mc Baruch Siach
2011-07-29 7:23 ` [RFC PATCH] powerpc: 85xx: Make e500/e500v2 depend on !E500MC Baruch Siach
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