From: Kurt Garloff <kurt@garloff.de>
Date: Tue, 17 Jan 2012 09:20:31 +0000 (-0500)
Subject: ACPI, x86: Use SRAT table rev to use 8bit or 32bit PXM fields (x86/x86-64)
X-Git-Tag: v3.2.2~29
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f318322990f13f251a650209f541546faec03a19;p=pandora-kernel.git

ACPI, x86: Use SRAT table rev to use 8bit or 32bit PXM fields (x86/x86-64)

commit cd298f60a2451a16e0f077404bf69b62ec868733 upstream.

In SRAT v1, we had 8bit proximity domain (PXM) fields; SRAT v2 provides
32bits for these. The new fields were reserved before.
According to the ACPI spec, the OS must disregrard reserved fields.

x86/x86-64 was rather inconsistent prior to this patch; it used 8 bits
for the pxm field in cpu_affinity, but 32 bits in mem_affinity.
This patch makes it consistent: Either use 8 bits consistently (SRAT
rev 1 or lower) or 32 bits (SRAT rev 2 or higher).

cc: x86@kernel.org
Signed-off-by: Kurt Garloff <kurt@garloff.de>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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