linux-kernel - Re: [PATCH v1 3/4] soc: starfive: Add StarFive JH71XX pmu driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 24 Nov 2022 17:44:14 +0800
From:   Walker Chen <walker.chen@...rfivetech.com>
To:     Conor Dooley <conor.dooley@...rochip.com>
CC:     Emil Renner Berthing <emil.renner.berthing@...onical.com>,
        <linux-riscv@...ts.infradead.org>, <linux-pm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, Rob Herring <robh+dt@...nel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 3/4] soc: starfive: Add StarFive JH71XX pmu driver

On 2022/11/24 17:28, Conor Dooley wrote:
> Hey Walker,
> Just jumping in here...
> 
> On Thu, Nov 24, 2022 at 05:08:57PM +0800, Walker Chen wrote:
>> On 2022/11/19 2:31, Emil Renner Berthing wrote:
>> > On Fri, 18 Nov 2022 at 14:35, Walker Chen <walker.chen@...rfivetech.com> wrote:
> 
>> >> diff --git a/include/soc/starfive/pm_domains.h b/include/soc/starfive/pm_domains.h
>> >> new file mode 100644
>> >> index 000000000000..a20e28e9baf3
>> >> --- /dev/null
>> >> +++ b/include/soc/starfive/pm_domains.h
>> >> @@ -0,0 +1,15 @@
>> >> +/* SPDX-License-Identifier: GPL-2.0 */
>> >> +/*
>> >> + * Copyright (C) 2022 StarFive Technology Co., Ltd.
>> >> + * Author: Walker Chen <walker.chen@...rfivetech.com>
>> >> + */
>> >> +
>> >> +#ifndef __SOC_STARFIVE_PMDOMAINS_H__
>> >> +#define __SOC_STARFIVE_PMDOMAINS_H__
>> >> +
>> >> +#include <linux/types.h>
>> >> +
>> >> +void starfive_pmu_hw_event_turn_on(u32 mask);
>> >> +void starfive_pmu_hw_event_turn_off(u32 mask);
>> >> +
>> >> +#endif /* __SOC_STARFIVE_PMDOMAINS_H__ */
>> > 
>> > The header and functions within are named very generic, but
>> > implemented by the jh71xx-specific driver.
>> > 
>> > Also who should use this header? These functions are never called by
>> > anything in this series.
>> 
>> These two functions will be used by the GPU module. Only the power-off
>> of the GPU is not controlled by the software through PMU module. So
>> here the functions are needed to export.
> 
> ...the general policy is to avoid adding things without users. I think
> they should be kept as static functions for now & when your GPU driver
> is being upstreamed you can expose these functions. That way your usage
> of them can be reviewed with the appropriate context.
> 

OK, thank you for your advice. I will modify the code according to your suggestion
 in the next version of patch.

Best Regards,
Walker Chen