On 3/4/2015 1:50 AM, Borislav Petkov wrote:
On Wed, Mar 04, 2015 at 12:43:08AM -0800, Arjan van de Ven wrote:
Using 'acpi_gbl_reduced_hardware' flag outside the ACPI code
is a mistake.
ideally, the presence of that flag in the firmware table will clear/set more
global settings,
for example, having that flag should cause the 8042 input code to not probe for
the 8042.
for interrupts, there really ought to be a "apic first/only" mode, which is
then used on
all modern systems (not just hw reduced).
Do we need some sort of platform-specific querying interfaces now too,
similar to cpu_has()? I.e., platform_has()...
if (platform_has(X86_PLATFORM_REDUCED_HW))
do stuff..
more like
platform_has(X86_PLATFORM_PIT)
etc, one for each legacy io item
so we can clear it on hw reduced, but also in other cases.
hw reduced is one way, but I'd be surprised if there weren't other ways (like
quirks)
where we'd want to do the same things
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