linux-kernel - Re: [PATCH] powerpc/32s: Slenderize

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Message-Id: <48YT3N3R0Nz9sSm@ozlabs.org>
Date:   Fri,  6 Mar 2020 11:27:43 +1100 (AEDT)
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     Christophe Leroy <christophe.leroy@....fr>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc/32s: Slenderize _tlbia() for powerpc 603/603e

On Mon, 2020-02-03 at 16:47:37 UTC, Christophe Leroy wrote:
> _tlbia() is a function used only on 603/603e core, ie on CPUs which
> don't have a hash table.
> 
> _tlbia() uses the tlbia macro which implements a loop of 1024 tlbie.
> 
> On the 603/603e core, flushing the entire TLB requires no more than
> 32 tlbie.
> 
> Replace tlbia by a loop of 32 tlbie.
> 
> Signed-off-by: Christophe Leroy <christophe.leroy@....fr>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/e1347a020b81fe47c80cd277bfaa61295a9482a4

cheers