linux-kernel - Re: [PATCH] x86: Bypass legacy PIC and PIT on ACPI hardware reduced platform

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Date:	Wed, 04 Mar 2015 00:43:08 -0800
From:	Arjan van de Ven <arjan@...ux.intel.com>
To:	Ingo Molnar <mingo@...nel.org>,
	"Li, Aubrey" <aubrey.li@...ux.intel.com>
CC:	"alan@...ux.intel.com" <alan@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>, Len.Brown@...el.com,
	x86@...nel.org, LKML <linux-kernel@...r.kernel.org>,
	Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH] x86: Bypass legacy PIC and PIT on ACPI hardware reduced
 platform

>
> 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).



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