From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
linuxppc dev list <linuxppc-dev@lists.ozlabs.org>
Cc: Michael Neuling <michael.neuling@au1.ibm.com>
Subject: Re: powerpc: Only do ERAT invalidate on radix context switch on P9 DD1
Date: Thu, 29 Jun 2017 22:21:22 +1000 (AEST) [thread overview]
Message-ID: <3wyzKZ3919z9s8H@ozlabs.org> (raw)
In-Reply-To: <1498421326.31581.113.camel@kernel.crashing.org>
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On Sun, 2017-06-25 at 20:08:46 UTC, Benjamin Herrenschmidt wrote:
> From: Michael Neuling <mikey@neuling.org>
>
> On P9 (Nimbus) DD2 and later, in radix mode, the move to the PID
> register will implicitly invalidate the user space ERAT entries
> and leave the kernel ones alone. Thus the only thing needed is
> an isync() to synchronize this with subsequent uaccess's
>
> Signed-off-by: Michael Neuling <mikey@neuling.org>
> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/74e27c6af56fe6898c3c8c45159574
cheers
prev parent reply other threads:[~2017-06-29 12:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-25 20:08 [PATCH] powerpc: Only do ERAT invalidate on radix context switch on P9 DD1 Benjamin Herrenschmidt
2017-06-29 12:21 ` Michael Ellerman [this message]
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