linux-kernel - Re: [PATCH 0/2] soc: qcom: rpmhpd: Improve rpmhpd enable handling

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:   Mon, 5 Jul 2021 14:55:30 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Andy Gross <agross@...nel.org>, Stephen Boyd <swboyd@...omium.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/2] soc: qcom: rpmhpd: Improve rpmhpd enable handling

On Sat, 3 Jul 2021 at 02:55, Bjorn Andersson <bjorn.andersson@...aro.org> wrote:
>
> During the discussion and investigation of [1] it became apparent that
> enabling a rpmhpd, without requesting a performance state is a nop. This
> results in a situation where drivers that normally would just describe
> their dependency on the power-domain and have the core implicitly enable
> that power domain also needs to make an explicit vote for a performance
> state - e.g. by a lone required-opp.
>
> [1] https://lore.kernel.org/linux-arm-msm/20210630133149.3204290-4-dmitry.baryshkov@linaro.org/
>
> Bjorn Andersson (2):
>   soc: qcom: rpmhpd: Use corner in power_off
>   soc: qcom: rpmhpd: Make power_on actually enable the domain
>
>  drivers/soc/qcom/rpmhpd.c | 19 ++++++++++++-------
>  1 file changed, 12 insertions(+), 7 deletions(-)
>

FWIW:

Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>

Kind regards
Uffe