From: James Hogan <james.hogan@imgtec.com>
To: "Maciej W. Rozycki" <macro@imgtec.com>
Cc: Aleksandar Markovic <aleksandar.markovic@rt-rk.com>,
<linux-mips@linux-mips.org>,
Goran Ferenc <goran.ferenc@imgtec.com>,
Miodrag Dinic <miodrag.dinic@imgtec.com>,
Aleksandar Markovic <aleksandar.markovic@imgtec.com>,
Douglas Leung <douglas.leung@imgtec.com>,
<linux-kernel@vger.kernel.org>,
Paul Burton <paul.burton@imgtec.com>,
Petar Jovanovic <petar.jovanovic@imgtec.com>,
Raghu Gandham <raghu.gandham@imgtec.com>,
Ralf Baechle <ralf@linux-mips.org>
Subject: Re: [PATCH v2 2/4] MIPS: VDSO: Add implementation of clock_gettime() fallback
Date: Thu, 6 Jul 2017 15:09:12 +0100 [thread overview]
Message-ID: <20170706140911.GG6973@jhogan-linux.le.imgtec.org> (raw)
In-Reply-To: <alpine.DEB.2.00.1707061405410.3339@tp.orcam.me.uk>
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On Thu, Jul 06, 2017 at 02:12:37PM +0100, Maciej W. Rozycki wrote:
> On Thu, 6 Jul 2017, James Hogan wrote:
> > > (and would have to forcibly use the 32-bit encoding in the microMIPS
> > > case)?
> >
> > I don't believe there is a 16-bit SYSCALL encoding in microMIPS, at
> > least I can't see one in the 5.04 manual.
>
> I referred to the preceding instruction, presumably LI, that does have a
> 16-bit variant in the microMIPS instruction set.
Ah yes, I see what you mean.
Hopefully microMIPS support is new enough for that not to matter.
It appears that the restart behaviour was improved in v2.6.36 in commit
8f5a00eb422e ("MIPS: Sanitize restart logics"), whereas first mentions
of micromips are in v3.9, in commit f8fa4811dbb2 ("MIPS: Add support for
the M14KEc core.").
Cheers
James
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WARNING: multiple messages have this Message-ID (diff)
From: James Hogan <james.hogan@imgtec.com>
To: "Maciej W. Rozycki" <macro@imgtec.com>
Cc: Aleksandar Markovic <aleksandar.markovic@rt-rk.com>,
linux-mips@linux-mips.org, Goran Ferenc <goran.ferenc@imgtec.com>,
Miodrag Dinic <miodrag.dinic@imgtec.com>,
Aleksandar Markovic <aleksandar.markovic@imgtec.com>,
Douglas Leung <douglas.leung@imgtec.com>,
linux-kernel@vger.kernel.org,
Paul Burton <paul.burton@imgtec.com>,
Petar Jovanovic <petar.jovanovic@imgtec.com>,
Raghu Gandham <raghu.gandham@imgtec.com>,
Ralf Baechle <ralf@linux-mips.org>
Subject: Re: [PATCH v2 2/4] MIPS: VDSO: Add implementation of clock_gettime() fallback
Date: Thu, 6 Jul 2017 15:09:12 +0100 [thread overview]
Message-ID: <20170706140911.GG6973@jhogan-linux.le.imgtec.org> (raw)
Message-ID: <20170706140912.xg6DbFfTbR0s6qSATkiV93bIQGdlKUZeAIoVRSOYQho@z> (raw)
In-Reply-To: <alpine.DEB.2.00.1707061405410.3339@tp.orcam.me.uk>
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On Thu, Jul 06, 2017 at 02:12:37PM +0100, Maciej W. Rozycki wrote:
> On Thu, 6 Jul 2017, James Hogan wrote:
> > > (and would have to forcibly use the 32-bit encoding in the microMIPS
> > > case)?
> >
> > I don't believe there is a 16-bit SYSCALL encoding in microMIPS, at
> > least I can't see one in the 5.04 manual.
>
> I referred to the preceding instruction, presumably LI, that does have a
> 16-bit variant in the microMIPS instruction set.
Ah yes, I see what you mean.
Hopefully microMIPS support is new enough for that not to matter.
It appears that the restart behaviour was improved in v2.6.36 in commit
8f5a00eb422e ("MIPS: Sanitize restart logics"), whereas first mentions
of micromips are in v3.9, in commit f8fa4811dbb2 ("MIPS: Add support for
the M14KEc core.").
Cheers
James
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next prev parent reply other threads:[~2017-07-06 14:09 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-28 15:55 [PATCH v2 0/4] MIPS: Fix several VDSO-related issues Aleksandar Markovic
2017-06-28 15:55 ` [PATCH v2 1/4] MIPS: VDSO: Fix conversions in do_monotonic()/do_monotonic_coarse() Aleksandar Markovic
2017-06-28 15:55 ` [PATCH v2 2/4] MIPS: VDSO: Add implementation of clock_gettime() fallback Aleksandar Markovic
2017-07-06 0:00 ` Maciej W. Rozycki
2017-07-06 0:00 ` Maciej W. Rozycki
2017-07-06 9:05 ` James Hogan
2017-07-06 9:05 ` James Hogan
2017-07-06 13:12 ` Maciej W. Rozycki
2017-07-06 13:12 ` Maciej W. Rozycki
2017-07-06 14:09 ` James Hogan [this message]
2017-07-06 14:09 ` James Hogan
2017-06-28 15:55 ` [PATCH v2 3/4] MIPS: VDSO: Add implementation of gettimeofday() fallback Aleksandar Markovic
2017-06-28 15:55 ` [PATCH v2 4/4] MIPS: VDSO: Fix a mismatch between comment and preprocessor constant Aleksandar Markovic
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