Hi Matt, > -----Original Message----- > From: Matt Fleming [mailto:[email protected]] > Sent: Tuesday, March 15, 2016 4:01 AM > To: Chen, Yu C > Cc: [email protected]; [email protected]; Rafael J. Wysocki; > Len Brown; Thomas Gleixner; Ingo Molnar; H. Peter Anvin; Zhang, Rui; linux- > [email protected]; [email protected]; [email protected]; Ard > Biesheuvel; Mark Salter > Subject: Re: [PATCH][RFC,v4] ACPI / PM: Introduce efi poweroff for HW-full > platforms without _S5 > > On Fri, 11 Mar, at 04:33:46PM, Chen, Yu C wrote: > > > > There is a future Base-IA platform, we are planning to skip > > implementing the SLP_TYP register and the S5 object. (already there > > will be no S3 and no S4) > > Cool. This is really valuable information that should go into the commit > message. > > Because if this is the rationale for the change, I don't see why we'd need to > provide the default stuff. Instead we should just enforce EFI reboot, and > only add the pm_poweroff_default hook if there is an explicit user in the > future, IMO.
Do you mean the patch v3 make sense https://patchwork.kernel.org/patch/8514751/ and we should use efi power off as our first choice, if there is no _S5 available(no acpi_power_off), even there is a customized poweroff(driver provided, eg)? Meanwhile, the legacy platforms will not be affected because there is no path to overwrite pm_power_off to efi power off. thanks, yu
