From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Tony Breeds <tony@bakeyournoodle.com>
Cc: Scott Wood <scottwood@freescale.com>, Jeremy Kerr <jk@ozlabs.org>,
Ian Munsie <imunsie@au1.ibm.com>,
linuxppc-dev@ozlabs.org
Subject: Re: [PATCH 1/2] powerpc: Add a proper syscall for switching endianness
Date: Mon, 16 Mar 2015 11:07:53 +1100 [thread overview]
Message-ID: <1426464473.17565.223.camel@kernel.crashing.org> (raw)
In-Reply-To: <20150315225912.GA39518@thor.bakeyournoodle.com>
On Mon, 2015-03-16 at 09:59 +1100, Tony Breeds wrote:
> On Fri, Mar 13, 2015 at 05:38:46PM +1100, Michael Ellerman wrote:
>
> > According to Paul there are no working implementations of LE on 32-bit cpus, so
> > the syscall doesn't really make sense there.
>
> Ummm that doesn't sound right. I don't think there is an LE linux userspace
> but I'm pretty sure we had 32-bit working on 44x. Check where Ian did the
> initial LE patchset.
Yes but that's done by using a per-page endian flag, not a global MSR
bit, so we never supported a syscall to switch there and never will.
Cheers,
Ben.
next prev parent reply other threads:[~2015-03-16 0:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-13 4:39 [PATCH 1/2] powerpc: Add a proper syscall for switching endianness Michael Ellerman
2015-03-13 4:39 ` [PATCH 2/2] selftests/powerpc: Add a test of the switch_endian() syscall Michael Ellerman
2015-03-13 5:01 ` Michael Ellerman
2015-03-13 7:10 ` Ram Pai
2015-03-13 7:16 ` Michael Ellerman
2015-03-13 6:38 ` [PATCH 1/2] powerpc: Add a proper syscall for switching endianness Michael Ellerman
2015-03-13 19:50 ` Scott Wood
2015-03-15 22:59 ` Tony Breeds
2015-03-16 0:07 ` Benjamin Herrenschmidt [this message]
2015-03-16 3:10 ` Michael Ellerman
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