[RFC PATCH 0/1] riscv: Introduce system suspend support

Conor Dooley conor at kernel.org
Tue Jan 17 14:34:59 PST 2023


Hey Drew!

On Fri, Jan 06, 2023 at 12:32:15PM +0100, Andrew Jones wrote:
> Booting with an OpenSBI including the RFC series[1] implementing the
> draft proposal for SBI system suspend[2] we can add system support to
> Linux. This support implements "suspend-to-RAM", which means when a
> kernel is built with CONFIG_SUSPEND 'echo mem > /sys/power/state' will
> initiate a suspension.
> 
> This has only been tested on QEMU using the OpenSBI system suspend
> test. The test just waits 5 seconds and then resumes. To truly use
> system suspend a platform must have a low-level firmware implementation
> and provide at least one wake-up event, such as from a wakeup-capable
> RTC alarm, to resume.
> 
> [1] https://github.com/jones-drew/opensbi/commits/susp-rfc
>     Posting: http://lists.infradead.org/pipermail/opensbi/2023-January/004091.html
> [2] https://github.com/jones-drew/riscv-sbi-doc/commit/d9e43e9a938fc3eb510e023c3f352462876f7785

In case you don't get alerts from GH, I left one *tiny* comment on this.
And I really mean tiny!

Thanks,
Conor.

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