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Message-ID: <54F6C59C.706@linux.intel.com>
Date: Wed, 04 Mar 2015 00:43:08 -0800
From: Arjan van de Ven <arjan@linux.intel.com>
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To: Ingo Molnar <mingo@kernel.org>, "Li, Aubrey" <aubrey.li@linux.intel.com>
CC: "alan@linux.intel.com" <alan@linux.intel.com>,
        "H. Peter Anvin" <hpa@linux.intel.com>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>, Len.Brown@intel.com,
        x86@kernel.org, LKML <linux-kernel@vger.kernel.org>,
        Borislav Petkov <bp@alien8.de>
Subject: Re: [PATCH] x86: Bypass legacy PIC and PIT on ACPI hardware reduced
 platform
References: <54F67ACC.3010500@linux.intel.com> <20150304050858.GB5158@gmail.com> <54F69774.2050400@linux.intel.com> <20150304053106.GA3701@gmail.com> <54F6A08B.2010105@linux.intel.com> <20150304073717.GA11736@gmail.com>
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>
> 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).