From mboxrd@z Thu Jan 1 00:00:00 1970 From: Min Lee Subject: Any available page table entry bits in Xen?? Date: Sat, 18 Oct 2008 12:44:06 -0400 Message-ID: <48FA1256.4070802@gatech.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org Hi, I'm working on Xen 3.2.1 and I'd like to know if there's any available bit in page table entries, on x86_32 (no pae), especially on L1 page table entry. It seems to me that all bits are used by Xen. Xen disallows all AVAIL bits and PCD/PWT/PAT bits to their guest and use them all? I've tried PCD/PWT/AVAIL bits but I couldn't find any availables. (didn't try PAT) Or it was my mistake? I'd like to know exactly what bits in page table I can safely and exclusively use in Xen.. Any available bit in page table entry or ideas? thank you in advance!! Min