 Home |
Products |
Support |
Community |
News |
xen-devel
[Xen-devel] [RESEND][PATCH 5/5]MTRR/PAT virtualization
| To: | <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [RESEND][PATCH 5/5]MTRR/PAT virtualization |
| From: | "Su, Disheng" <disheng.su@xxxxxxxxx> |
| Date: | Wed, 17 Oct 2007 16:45:41 +0800 |
| Delivery-date: | Wed, 17 Oct 2007 01:47:11 -0700 |
| Envelope-to: | www-data@xxxxxxxxxxxxxxxxxx |
| List-help: | <mailto:xen-devel-request@lists.xensource.com?subject=help> |
| List-id: | Xen developer discussion <xen-devel.lists.xensource.com> |
| List-post: | <mailto:xen-devel@lists.xensource.com> |
| List-subscribe: | <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe> |
| List-unsubscribe: | <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe> |
| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
| Thread-index: | AcgQmhkEL6J0p3KpR26/UYCURgEVdg== |
| Thread-topic: | [RESEND][PATCH 5/5]MTRR/PAT virtualization |
When guest changes MTRR/PAT, must flush cache and destroy shadow page
table in xen. This can be done in do_msr_write when guest changes
MTRR/PAT related MSRs. But there is a window that MTRR/PAT is different
between VCPUs when changing MTRR/PAT, it may bring some troubles or
incorrect. So we try another way to do it:
The guest will enter no-fill cache mode(set CR0:CD/NW) befor
changing MTRR/PAT, then update MTRR/PAT and exit no-fill mode. We
intercept the changing of cache mode. If one of vcpu is in no-fill mode
or MTRR/PAT is different between vcpus, set shadow pte as UC. When all
the vcpus exit from no-fill mode, and MTRR/PAT is the same between
vcpus, set shadow pte as usual.
Best Regards,
Disheng, Su
_______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | [Xen-devel] [RESEND][PATCH 0/5]MTRR/PAT virtualization, Su, Disheng |
|---|---|
| Next by Date: | [Xen-devel] [RESEND][PATCH 4/5]MTRR/PAT virtualization, Su, Disheng |
| Previous by Thread: | [Xen-devel] [RESEND][PATCH 0/5]MTRR/PAT virtualization, Su, Disheng |
| Next by Thread: | [Xen-devel] [RESEND][PATCH 4/5]MTRR/PAT virtualization, Su, Disheng |
| Indexes: | [Date] [Thread] [Top] [All Lists] |
