linux-kernel - Re: [PATCH][RFC v3] ACPI / PM: Fix poweroff issue on HW-full platforms without

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] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 08 Mar 2016 02:53:46 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	"Chen, Yu C" <yu.c.chen@...el.com>
Cc:	"Rafael J. Wysocki" <rafael@...nel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Len Brown <lenb@...nel.org>,
	Matt Fleming <matt@...eblueprint.co.uk>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Zhang, Rui" <rui.zhang@...el.com>
Subject: Re: [PATCH][RFC v3] ACPI / PM: Fix poweroff issue on HW-full platforms without _S5

On Monday, March 07, 2016 03:53:13 PM Chen, Yu C wrote:
> Hi Rafael,
> (resend for broken content)
> 
> > -----Original Message-----
> > From: rjwysocki@...il.com [mailto:rjwysocki@...il.com] On Behalf Of
> > Rafael J. Wysocki
> > Sent: Monday, March 07, 2016 9:19 PM
> > To: Chen, Yu C
> > Cc: ACPI Devel Maling List; x86@...nel.org; linux-efi@...r.kernel.org; Linux
> > Kernel Mailing List; linux-pm@...r.kernel.org; Rafael J. Wysocki; Len Brown;
> > Matt Fleming; Thomas Gleixner; Ingo Molnar; H. Peter Anvin; Zhang, Rui
> > Subject: Re: [PATCH][RFC v3] ACPI / PM: Fix poweroff issue on HW-full
> > platforms without _S5
> > 
> [cut]
> > >  bool efi_poweroff_required(void)
> > >  {
> > > -       return !!acpi_gbl_reduced_hardware;
> > > +       return acpi_gbl_reduced_hardware || (acpi_no_s5 &&
> > > + !pm_power_off);
> > 
> > What if CONFIG_ACPI is not set here?
> If CONFIG_ACPI is not set, this file would not 
> be compiled, because CONFIG_EFI depends on CONFIG_ACPI.

OK

So the next question will be if efi_poweroff_required() is guaranteed to run
after all of the other code that may register alternative power off handling.

Thanks,
Rafael