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

From: Conor Dooley <conor.dooley@microchip.com>
To: Andrew Jones <ajones@ventanamicro.com>
Cc: Conor Dooley <conor@kernel.org>,
	<linux-riscv@lists.infradead.org>,
	'Anup Patel ' <apatel@ventanamicro.com>,
	'Albert Ou ' <aou@eecs.berkeley.edu>,
	'Paul Walmsley ' <paul.walmsley@sifive.com>,
	'Sia Jee Heng ' <jeeheng.sia@starfivetech.com>,
	'Palmer Dabbelt ' <palmer@dabbelt.com>,
	'Ley Foon Tan ' <leyfoon.tan@starfivetech.com>
Subject: Re: [RFC PATCH 1/1] riscv: sbi: Introduce system suspend support
Date: Wed, 11 Jan 2023 09:06:30 +0000	[thread overview]
Message-ID: <Y758Fq/2jIX6eKmJ@wendy> (raw)
In-Reply-To: <20230111085211.wdsn4tnpsaxblxhm@orel>

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On Wed, Jan 11, 2023 at 09:52:11AM +0100, Andrew Jones wrote:
> On Tue, Jan 10, 2023 at 10:23:00PM +0000, Conor Dooley wrote:
> > On Fri, Jan 06, 2023 at 12:32:16PM +0100, Andrew Jones 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.
> > > 
> > > Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
> > 
> > First things first, anything SBI depends on !m-mode, so you've gotta add
> > some sort of gating unfortunately around those ECALLs. But I figure you
> > may have already seen the build failures on patchwork for nommu?
> 
> Actually, no, and I think I missed other emails like that in the past. I
> assume I'm on the To: of these messages, so it's odd they're not showing
> up. Can you forward me this message? I'll inspect the headers and try to
> figure what's going on.

Oh my bad, I assumed that you'd look on patchwork. I haven't made it send
emails as I don't trust it not to spam people with build issues that are
not their fault.

Sorry!
Conor.

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