linux-kernel - [PATCH 2/3] Resend: x86-64: Handle SRAT v1 and v2 consistently

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Message-ID: <20090714165830.GF31657@tpkurt2.suse.de>
Date:	Tue, 14 Jul 2009 18:58:30 +0200
From:	Kurt Garloff <garloff@...e.de>
To:	Linux kernel list <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/3] Resend: x86-64: Handle SRAT v1 and v2 consistently

Hi,

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 disregard reserved fields.

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).

This is patch 2/3.

Signed-off-by: Kurt Garloff <garloff@...e.de>
-- 
Kurt Garloff, VP OPS Partner Engineering -- Novell Inc.

View attachment "02_srat-pxm-rev-x86-64.diff" of type "text/x-patch" (1375 bytes)

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