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[Xen-devel] [Q] guest and user protection on x86-64 by paging
| To: | Xen-devel@xxxxxxxxxxxxxxxxxxx |
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| Subject: | [Xen-devel] [Q] guest and user protection on x86-64 by paging |
| From: | Min Lee <min.lee@xxxxxxxxxx> |
| Date: | Sun, 01 Aug 2010 12:01:14 -0400 |
| Cc: | |
| Delivery-date: | Sun, 01 Aug 2010 09:02:17 -0700 |
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Hi, folks.one question. I'll read source code, but if one can give me brief overview, it would be so helpful. On x86-64, guest and user runs both in ring 3, and protect from each other by paging mechanism. but, how? Then page table should be modified and TLB would be flushed for every system call. This would be some overhead, I think. Is this what Xen is doing? If not, how paging mechanism protect guest from its application? Thanks Min _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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