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

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Message-ID: <20221014105938.fyy6jns5fsu5xd7q@bogus>
Date:   Fri, 14 Oct 2022 11:59:38 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     Besar Wicaksono <bwicaksono@...dia.com>
Cc:     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

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 ?

-- 
Regards,
Sudeep