linux-kernel - Re: [PATCH 00/11] powerpc8xx: Further optimisation of TLB handling

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Date:	Mon, 20 Apr 2015 07:55:36 +0200
From:	leroy christophe <christophe.leroy@....fr>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <mpe@...erman.id.au>, scottwood@...escale.com
CC:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	Joakim Tjernlund <joakim.tjernlund@...nsmode.se>
Subject: Re: [PATCH 00/11] powerpc8xx: Further optimisation of TLB handling

Le 20/04/2015 07:26, Christophe Leroy a écrit :
> This patchset provides a further optimisation of TLB handling in the 8xx.
> Main changes are based on:
> - Using processor handling of PGD/PTE Validity bits instead of testing ourselves
> the entries validity
> - Aligning PGD address to allow direct bit manipulation
> - Not saving registers like CR when not needed
>
> It also adds support to any TASK_SIZE
>
> Patchset:
> 01 - powerpc/8xx: remove remaining unnecessary code in FixupDAR
> 02 - powerpc/8xx: remove tests on PGDIR entry validity
> 03 - powerpc32: Use kmem_cache memory for PGDIR
> 04 - powerpc/8xx: Take benefit of aligned PGDIR
> 05 - powerpc/8xx: Optimise access to swapper_pg_dir
> 06 - powerpc/8xx: Remove duplicated code in set_context()
> 07 - powerpc/8xx: macro for handling CPU15 errata
> 08 - powerpc/8xx: Handle CR out of exception PROLOG/EPILOG
> 09 - powerpc/8xx: dont save CR in SCRATCH registers
> 10 - powerpc/8xx: Use SPRG2 instead of DAR for saving r3
> 11 - powerpc/8xx: Add support for TASK_SIZE greater than 0x80000000
>
> All changes have been successfully tested on MPC885
>
> Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
> Tested-by: Christophe Leroy <christophe.leroy@....fr>
Sorry, forget than one, my finger slipped and I resent a very old one 
already applied

Christophe


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