On Thu, 2014-06-19 at 14:40 +0100, Matt Fleming wrote: > From: Matt Fleming <matt.fleming@xxxxxxxxx> > > Not only can EfiResetSystem() be used to reboot, it can also be used to > power down machines. > > By and large, this functionality doesn't work very well across the range > of EFI machines in the wild, so it should definitely only be used as a > last resort. In an ideal world, this wouldn't be needed at all. > > Unfortunately, we're starting to see machines where EFI is the *only* > reliable way to power down, and nothing else, not PCI, not ACPI, works. > > efi_poweroff_required() should be implemented on a per-architecture > basis, since exactly when we should be using EFI runtime services is a > platform-specific decision. There's no analogue for reboot because each > architecture handles reboot very differently - the x86 code in > particular is pretty complex. > > Patches to enable this for specific classes of hardware will be > submitted separately. > > Cc: Mark Salter <msalter@xxxxxxxxxx> > Signed-off-by: Matt Fleming <matt.fleming@xxxxxxxxx> > --- Tested-by: Mark Salter <msalter@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
