From: Min Lee <min.lee@gatech.edu>
To: Xen-devel@lists.xensource.com
Subject: [Q] guest and user protection on x86-64 by paging
Date: Sun, 01 Aug 2010 12:01:14 -0400 [thread overview]
Message-ID: <4C559A4A.1030809@gatech.edu> (raw)
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
next reply other threads:[~2010-08-01 16:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-01 16:01 Min Lee [this message]
2010-08-02 6:31 ` [Q] guest and user protection on x86-64 by paging Jeremy Fitzhardinge
2010-08-02 14:35 ` Min Lee
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