linux-kernel - Re: [PATCH v2] ACPI: ARM Performance Monitoring Unit Table (APMT) initial support

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Message-ID: <Y0lu5Vqs8pVeAfwR@lpieralisi>
Date:   Fri, 14 Oct 2022 16:15:01 +0200
From:   Lorenzo Pieralisi <lpieralisi@...nel.org>
To:     Sudeep Holla <sudeep.holla@....com>
Cc:     Besar Wicaksono <bwicaksono@...dia.com>, rafael@...nel.org,
        lenb@...nel.org, catalin.marinas@....com, will@...nel.org,
        lorenzo.pieralisi@....com, guohanjun@...wei.com,
        linux-tegra@...r.kernel.org, treding@...dia.com,
        jonathanh@...dia.com, vsethi@...dia.com,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2] ACPI: ARM Performance Monitoring Unit Table (APMT)
 initial support

[Please Besar update my email address according to MAINTAINERS - I missed
this thread]

On Fri, Oct 14, 2022 at 11:59:38AM +0100, Sudeep Holla wrote:
> Hi Besar,
> 
> On Wed, Sep 28, 2022 at 07:28:34PM -0500, Besar Wicaksono wrote:
> > ARM Performance Monitoring Unit Table describes the properties of PMU
> > support in ARM-based system. The APMT table contains a list of nodes,
> > each represents a PMU in the system that conforms to ARM CoreSight PMU
> > architecture. The properties of each node include information required
> > to access the PMU (e.g. MMIO base address, interrupt number) and also
> > identification. For more detailed information, please refer to the
> > specification below:
> >  * APMT: https://developer.arm.com/documentation/den0117/latest
> >  * ARM Coresight PMU:
> >         https://developer.arm.com/documentation/ihi0091/latest
> > 
> > The initial support adds the detection of APMT table and generic
> > infrastructure to create platform devices for ARM CoreSight PMUs.
> > Similar to IORT the root pointer of APMT is preserved during runtime
> > and each PMU platform device is given a pointer to the corresponding
> > APMT node.
> > 
> 
> This looks good to me know.
> 
> Reviewed-by: Sudeep Holla <sudeep.holla@....com>
> 
> Hi Lorenzo,
> 
> Not sure if there are any other arm specific ACPI changes in the queue
> for v6.2. Can you please add this too ?

We should just ask Catalin/Will to pick it up for the next kernel cycle,
if there is no need to repost we can just remind them in a couple
of weeks.

This also requires Rafael's review - at least to acknowledge the
change.

Thanks,
Lorenzo