linux-kernel - Re: [PATCH 0/2] arm64 SMMUv3 PMU driver with IORT support

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Message-ID: <20171012110538.GA8509@red-moon>
Date:   Thu, 12 Oct 2017 12:05:38 +0100
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     Hanjun Guo <guohanjun@...wei.com>
Cc:     "Leeder, Neil" <nleeder@...eaurora.org>,
        Hanjun Guo <hanjun.guo@...aro.org>,
        Will Deacon <will.deacon@....com>,
        Mark Rutland <mark.rutland@....com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Mark Langsdorf <mlangsdo@...hat.com>,
        Mark Salter <msalter@...hat.com>, Jon Masters <jcm@...hat.com>,
        Timur Tabi <timur@...eaurora.org>,
        Mark Brown <broonie@...nel.org>,
        Robin Murphy <robin.murphy@....com>
Subject: Re: [PATCH 0/2] arm64 SMMUv3 PMU driver with IORT support

On Thu, Oct 12, 2017 at 06:58:33PM +0800, Hanjun Guo wrote:
> On 2017/8/11 11:28, Leeder, Neil wrote:
> > On 8/9/2017 9:26 PM, Hanjun Guo wrote:
> >> > On 2017/8/9 23:48, Leeder, Neil wrote:
> >>>>> >>>>    drivers/perf/Kconfig          |   9 +
> >>>>> >>>>    drivers/perf/Makefile         |   1 +
> >>>>> >>>>    drivers/perf/arm_smmuv3_pmu.c | 823 ++++++++++++++++++++++++++++++++++++++++++
> >>>>> >>>>    include/acpi/actbl2.h         |   9 +-
> >>>> >>> Do you have the acpica support code? I'm currently
> >>>> >>> working on SMMUv3 MSI support and I would like to test
> >>>> >>> it with MSI support for PMCG as well.
> >>> >> I don't have any code other than what was posted here.
> >>> >> What additional ACPICA support code is needed?
> >> > 
> >> > Sorry for not clear, I mean the acpica code for iASL and
> >> > other tool: github.com/acpica/acpica.git
> >> > 
> >> > With that code, I can compile my IORT table with PMCG node.
> > Unfortunately it looks like I'm the first person from Qualcomm Datacenter
> > Technologies to try to add something to ACPICA, which means I'll have to
> > kick off an internal legal process which may take some time. Unless someone
> > else wants to take a crack at it - and really, there's nothing more than is
> > in the ARM IORT spec - it could be a while before I can do that.
> 
> Just a update, I sent a pull request to Bob for ACPICA changes,
> please take a look:
> 
> https://github.com/acpica/acpica/pull/327

You should not have done that. We need to update IORT specifications
for IORT PMCG before merging ACPICA PMCG support.

Ask Robert to drop it straight away or I will.

Lorenzo