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[Xen-devel] [PATCH 4/5] svm: implement CR access part of DecodeAssist
| To: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH 4/5] svm: implement CR access part of DecodeAssist |
| From: | Andre Przywara <andre.przywara@xxxxxxx> |
| Date: | Fri, 15 Apr 2011 14:23:25 +0200 |
| Cc: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Fri, 15 Apr 2011 05:26:21 -0700 |
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Newer SVM implementations (Bulldozer) now give the used general purpose register on a MOV-CR intercept explictly. This avoids fetching and decoding the instruction from guest's memory and speeds up some Windows guest, which exercise CR8 quite often. Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
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