[Feature Request] A test for ACPI _REV

[Colin Ian King]

On 18/03/15 09:04, Alex Hung wrote:
> It starts with a recent patch by Matthew Garrett:
> http://comments.gmane.org/gmane.linux.acpi.devel/74165
> 
> I have seen a lot _REV uses for OS detect in many major OEM systems,
> including but not limiting to Dell and HP in Matthew's comments. It is
> probably a know-how among BIOS community. However, Matthew's patch
> will certainly change the game after it gets into kernel.
> 
> Today I have receive a feature request as below:
> =========================================================
> ... make sure that we are aware of this when there is a test for _REV
> included in our BIOSes.  I'd like to make sure that if _REV is found
> in the BIOS to be tested that it at least starts a discussion to
> understand what it's doing and if it's the right thing for the system.
> =========================================================
> 
> I am looking for some discussion and feedback from FWTS community
> whether this should be included in FWTS.

I'd prefer it if fwts could check for this directly rather than
indirectly trying to scan for kernel messages.

> 
> Alternatively, it may be possible to modify kernel to generate a
> message like _OSI:
>     [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
> and fwts can try to catch it in klog test, assuming kernel can include
> this patch.
>