From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kaustubh Kabra Subject: Doubt regarding virtual memory mapping from hypervisor to a domain Date: Sat, 29 Jan 2011 00:53:29 +0530 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 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 Cc: vasani.ashwin@gmail.com, Dan Magenheimer , keir@xen.org, Tim.Deegan@citrix.com List-Id: xen-devel@lists.xenproject.org Hi, I have allocated few order=9 pages in Xen memory space using alloc_domheap_pages(NULL,9,0) during boot time just before domain is created (dom0 = domain_create(0, DOMCRF_s3_integrity, DOM0_SSIDREF) in xen/arch/x86/setup.c). I got the following virtual addresses in xen log message- (XEN) a2k2: Virt_addr:ffff83011cc00000 MFN:11cc00 (XEN) a2k2: Virt_addr:ffff83011ca00000 MFN:11ca00 (XEN) a2k2: Virt_addr:ffff83011c800000 MFN:11c800 (XEN) a2k2: Virt_addr:ffff83011c600000 MFN:11c600 (XEN) a2k2: Virt_addr:ffff83011c400000 MFN:11c400 (XEN) a2k2: Virt_addr:ffff83011c200000 MFN:11c200 (XEN) a2k2: Virt_addr:ffff83011c000000 MFN:11c000 (XEN) a2k2: Virt_addr:ffff83011be00000 MFN:11be00 As per config.h file Xen memory map,the virtual mapping shows that the memory is allocated in 1:1 direct mapping of all physical memory .Can anyone elaborate regarding this mapping ? Now can I allocate this mapped memory reserved by Xen hypervisor to any domain through any existing or my new hypercall? -- Regards, Kaustubh Kabra Pune Institute Of Computer Technology, University of Pune, India.