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[Xen-devel] [PATCH] Check AMD SYSCFG DramModEn bit for MTRR configuratio

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Subject: [Xen-devel] [PATCH] Check AMD SYSCFG DramModEn bit for MTRR configuration
From: Wei Huang <wei.huang2@xxxxxxx>
Date: Tue, 1 Mar 2011 15:11:48 -0600
Delivery-date: Tue, 01 Mar 2011 13:14:40 -0800
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This patch checks whether SYSCFG DramModEn bit is clear by BIOS. Some buggy BIOS might set this bit to 1, which causes unexpected behavior on AMD platforms. This patch also increase family check for AMD CPUs when setting fixed MTRR ranges.

Signed-off-by: Wei Huang <wei.huang2@xxxxxxx>

PS: If OK, please apply it to both xen-4.1 and xen-4.0 trees.

Attachment: check_amd_syscfg_moden_bit.txt
Description: check_amd_syscfg_moden_bit.txt

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