On 11/19/2018 1:10 PM, Keith Busch wrote:
We can't really turn off firmware first in the kernel without asking help
from the firmware.
The _OSC method this patch utilizes is the ACPI spec defined way for
the kernel to wrest control from firmware. BIOS specific menu settings
shouldn't be our only recourse when we have a spec authority defining
generic OS interfaces to accomplish the same thing.
Unless there is a disagreement on the _OSC interpreation, we'd have to
accept that platforms breaking from this patch are non-compliant.
It depends on which spec you look :)
UEFI HEST table specification also claims that it should be the ultimate
table for when PCI firmware-first should be disabled/enabled.
I think somebody needs to fix these. I saw an email from Harb Abdulhamid
sent to aswg this morning.
That's why I suggested circulating this idea in UEFI forums first.
Let's see what everybody thinks. We can go from there.
