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RE: [Xen-devel] [PATCH][SVM] fix pae for guests on 32bit HV
| To: | "Nakajima, Jun" <jun.nakajima@xxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | RE: [Xen-devel] [PATCH][SVM] fix pae for guests on 32bit HV |
| From: | "Woller, Thomas" <thomas.woller@xxxxxxx> |
| Date: | Thu, 20 Apr 2006 17:22:58 -0500 |
| Delivery-date: | Thu, 20 Apr 2006 15:23:32 -0700 |
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| Thread-index: | AcZkkzsYgEcC4MlST6+Afk5oQfG/3AAKiugwAAI48xA= |
| Thread-topic: | [Xen-devel] [PATCH][SVM] fix pae for guests on 32bit HV |
> The current shadow code does not support PAE guests on the > PAE Xen. It's much harder given (compared with x64-64) the > limited bits in page_info. > Should work on the 64-bit Xen. Anyway, we need to cleanly > kill such guests on the PAE Xen. Now this does mean no NX support on PAE xen. Attached patch simply turns off PAE if paging level < 4 in vt and svm. Tested win2003 EE on svm and vt, allows 32bit windows guests to boot without shadow.c bug() crash. Only issue seen is if setting guest config memory >~4096 then the guest does not boot, but does not crash the hv - stays in blocked state. So, I think that this solution is fine for now. Svm shadows PAE and NX so the code is slightly different. I'll post with signed-off if ok for vmx also. thanks Tom
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