ACPI_STRICT_COMPLIANCE (was RE: RE: ACPI -- Workaround for broken DSDT)

[Len Brown <len.brown-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>]

On Mon, 2004-02-09 at 15:29, Nate Lawson wrote:

> We're doing something slightly different with ACPI on FreeBSD.  We add
> hacks^Wworkarounds for buggy DSDT whenever possible but they are under a
> kernel option, #ifndef ACPICA_PEDANTIC.  The default is for this option to
> give maximum compatibility with the stock DSDT, at the expense of spec
> correctness.  However, by adding that option and compiling a kernel, OEMs
> could test against ACPI-CA as a reference implementation while ordinary
> users get maximum compatibility.
> 
> I think the ACPI-CA developers should take a similar tact.  Len, who is on
> the Linux side, could suggest distribution maintainers use the option that
> gives maximum Windows compatibility when shipping a distro.  Bob, who is
> on the ACPI-CA side, could encourage OEMs to test with the option
> disabled.  It might even make sense for a Linux distro maintainer to
> partner with ACPI-CA to provide a reference ISO that OEMs could boot that
> had a /sbin/init that tests the various APIs for correctness.  Both Andy
> and I thought this was a good direction to go and perhaps people are
> already making progress in that area.

Nate,
I think you're right, practical compatibility must be the default, and a
single config option should allow an OEM to disable the out-of-spec
warnings and workarounds.

CONFIG_ACPI_STRICT_COMPLIANCE seems to be a good choice for the config
option.  Disabled by default, enabled by OEMs for testing their
platforms.

Right now, CONFIG_ACPI_RELAXED AML would be replaced by this.  This will
fix the issue that RELAXED_AML is not currently enabled by default.

We have some warnings and workarounds that gum-up various dmesg that I
think we can put under this umbrella also.

thanks,
-Len




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