[RFC v2 PATCH 1/1] riscv: sbi: Introduce system suspend support

[Conor Dooley]

On Tue, Feb 28, 2023 at 07:54:56AM -0800, Palmer Dabbelt wrote:
> On Wed, 18 Jan 2023 10:03:38 PST (-0800), ajones at ventanamicro.com wrote:
> > When the SUSP SBI extension is present it implies that the standard
> > "suspend to RAM" type is available. Wire it up to the generic
> > platform suspend support, also applying the already present support
> > for non-retentive CPU suspend. When the kernel is built with
> > CONFIG_SUSPEND, one can do 'echo mem > /sys/power/state' to suspend.
> > Resumption will occur when a platform-specific wake-up event arrives.
> > 

> The code looks fine, but I can't find the SUSP extension anywhere.  There's
> just hart suspend in
> <https://github.com/riscv-non-isa/riscv-sbi-doc/blob/master/riscv-sbi.adoc>.

It's not merged yet, so:
https://lists.riscv.org/g/tech-prs/message/222
&
https://lists.riscv.org/g/tech-prs/message/228

Or on GitHub for those who are not members of the RVI stuff:
https://github.com/jones-drew/riscv-sbi-doc/commits/susp-v1
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