From: Scott Wood <scottwood@freescale.com>
To: Purcareata Bogdan <b43198@freescale.com>
Cc: linuxppc-dev@lists.ozlabs.org,
Bogdan Purcareata <bogdan.purcareata@freescale.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] powerpc/mpic: Remove WHOAMI readback after EOI
Date: Wed, 13 May 2015 11:33:57 -0500 [thread overview]
Message-ID: <1431534837.3868.42.camel@freescale.com> (raw)
In-Reply-To: <55534225.1050305@freescale.com>
On Wed, 2015-05-13 at 15:23 +0300, Purcareata Bogdan wrote:
> Ping?
>
> On 24.03.2015 12:43, Bogdan Purcareata wrote:
> > After previous discussions regarding the subject [1][2], there's no clear
> > explanation or reason why the call was needed in the first place. The sensible
> > argument is some sort of synchronization between the CPU and the MPIC, which
> > hasn't been pointed out precisely and is no longer required (at least on BookE
> > platforms).
> >
> > The benefit of this change is saving a MMIO trap per interrupt when running in a
> > KVM guest.
> >
> > [1] https://patchwork.ozlabs.org/patch/429098/
> > [2] https://patchwork.ozlabs.org/patch/433557/
> >
> > Signed-off-by: Bogdan Purcareata <bogdan.purcareata@freescale.com>
> > ---
> > arch/powerpc/sysdev/mpic.c | 1 -
> > 1 file changed, 1 deletion(-)
Don't top-post.
This is commit 56302c53d3dc477b8360954fc92c1dfc4fc0ec54 in Linus's tree.
-Scott
WARNING: multiple messages have this Message-ID (diff)
From: Scott Wood <scottwood@freescale.com>
To: Purcareata Bogdan <b43198@freescale.com>
Cc: Bogdan Purcareata <bogdan.purcareata@freescale.com>,
<linuxppc-dev@lists.ozlabs.org>, <segher@kernel.crashing.org>,
<benh@kernel.crashing.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] powerpc/mpic: Remove WHOAMI readback after EOI
Date: Wed, 13 May 2015 11:33:57 -0500 [thread overview]
Message-ID: <1431534837.3868.42.camel@freescale.com> (raw)
In-Reply-To: <55534225.1050305@freescale.com>
On Wed, 2015-05-13 at 15:23 +0300, Purcareata Bogdan wrote:
> Ping?
>
> On 24.03.2015 12:43, Bogdan Purcareata wrote:
> > After previous discussions regarding the subject [1][2], there's no clear
> > explanation or reason why the call was needed in the first place. The sensible
> > argument is some sort of synchronization between the CPU and the MPIC, which
> > hasn't been pointed out precisely and is no longer required (at least on BookE
> > platforms).
> >
> > The benefit of this change is saving a MMIO trap per interrupt when running in a
> > KVM guest.
> >
> > [1] https://patchwork.ozlabs.org/patch/429098/
> > [2] https://patchwork.ozlabs.org/patch/433557/
> >
> > Signed-off-by: Bogdan Purcareata <bogdan.purcareata@freescale.com>
> > ---
> > arch/powerpc/sysdev/mpic.c | 1 -
> > 1 file changed, 1 deletion(-)
Don't top-post.
This is commit 56302c53d3dc477b8360954fc92c1dfc4fc0ec54 in Linus's tree.
-Scott
next prev parent reply other threads:[~2015-05-13 16:34 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-24 10:43 [PATCH] powerpc/mpic: Remove WHOAMI readback after EOI Bogdan Purcareata
2015-03-24 10:43 ` Bogdan Purcareata
2015-05-13 12:23 ` Purcareata Bogdan
2015-05-13 12:23 ` Purcareata Bogdan
2015-05-13 16:33 ` Scott Wood [this message]
2015-05-13 16:33 ` Scott Wood
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1431534837.3868.42.camel@freescale.com \
--to=scottwood@freescale.com \
--cc=b43198@freescale.com \
--cc=bogdan.purcareata@freescale.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.