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[Xen-devel] [PATCH] Check AMD SYSCFG DramModEn bit for MTRR configuratio
| To: | "'xen-devel@xxxxxxxxxxxxxxxxxxx'" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| 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.
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