linux-kernel - Re: [PATCH v2 0/2] firmware: arm_scmi: add pm ops for scmi_power

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] [day] [month] [year] [list]

Message-Id: <175198830381.785998.16571714646012056824.b4-ty@arm.com>
Date: Tue,  8 Jul 2025 16:26:03 +0100
From: Sudeep Holla <sudeep.holla@....com>
To: Cristian Marussi <cristian.marussi@....com>,
	Peng Fan <peng.fan@....com>
Cc: Sudeep Holla <sudeep.holla@....com>,
	arm-scmi@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Ranjani Vaidyanathan <ranjani.vaidyanathan@....com>,
	Chuck Cannon <chuck.cannon@....com>
Subject: Re: [PATCH v2 0/2] firmware: arm_scmi: add pm ops for scmi_power_control

On Fri, 04 Jul 2025 11:09:34 +0800, Peng Fan wrote:
> Move information could be found in patch 2 commit log, hope it is clear
> 
> When testing on i.MX95, two consecutive suspend message send to the Linux
> agent, Linux will suspend(by the 1st suspend message) and wake up(by the
> 2nd suspend message).
> 
> The ARM SCMI spec does not allow for filtering of which messages an agent
> wants to get on the system power protocol. To i.MX95, as we use mailbox
> to receive message, and the mailbox supports wake up(interrupt is always
> enabled), so linux will also get a repeated suspend message. This will
> cause Linux to wake (and should then go back into suspend).
> 
> [...]

Applied to sudeep.holla/linux (for-linux-next), thanks!
(with some commit message changes and removal of #ifdef)

[1/2] firmware: arm_scmi: bus: Add pm ops
      https://git.kernel.org/sudeep.holla/c/76e65f7a0e0f
[2/2] firmware: arm_scmi: power_control: Set SCMI_SYSPOWER_IDLE in PM resume
      https://git.kernel.org/sudeep.holla/c/9a0658d3991e

--
Regards,
Sudeep