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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Proper place for an overview of Xen virtual space
On Thu, Jul 26, 2012 at 11:29:21AM +0200, Petr Tesarik wrote:
> Hello all,
>
> while working on makedumpfile support of Xen4, I made a side-by-side
> comparison of the Xen3 and Xen4 virtual space on x86_64 (attached). I believe
> that it can be useful to others as well, but I don't know what would be an
> appropriate place for it.
Nice!
It might be also usefull to add the PGD/PUd indexes so one knows that that
the M2P sits in 261 (and in 256), ioremap is 267, etc..
>
> Regards,
> Petr Tesarik
> SUSE Linux
> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
> <html>
> <head>
> <title>Xen Memory Map</title>
> <style type="text/css">
> body { color: black; background-color: white; }
> td { padding: 4px; }
> th { padding: 4px; }
> tr { vertical-align: top; }
> td.hrule { height:1px; padding: 0px; margin: 0px; background-color: black; }
> td.addr { font-family: monospace; padding-right: 16px; }
> td.code { background-color: #000080; color: white; }
> td.compat { background-color: #800000; color: white; }
> td.direct { background-color: #ffff00; }
> td.frametable { background-color: #008080; color: white; }
> td.guest { }
> td.ioremap { background-color: #008000; color: white; }
> td.mpt { background-color: #00ff00; }
> td.pagetable { }
> td.perdomain { }
> td.reserved { background-color: #c0c0c0; }
> td.unavail { background-color: #808080; color: white; }
> </style>
> </head>
> <body>
> <table>
> <thead>
> <tr><th>Range</th> <th>Xen3</th> <th>Xen4</th></tr>
> <tr><td class=hrule colspan=3></td></tr>
> </thead>
> <tbody>
> <tr>
> <td class=addr>0x0000000000000000<br>0x00007fffffffffff</td>
> <td class=guest colspan=2>[128T] Guest-defined use</td>
> </tr>
> <tr>
> <td class=addr>0x0000800000000000<br>0xffff7fffffffffff</td>
> <td class=unavail colspan=2>[16E] Inaccessible</td>
> </tr>
> <tr>
> <td class=addr>0xffff800000000000<br>0xffff803fffffffff</td>
> <td class=guest colspan=2>[256G] Read-only machine-to-phys translation table
> (GUEST ACCESSIBLE)</td>
> </tr>
> <tr>
> <td class=addr>0xffff804000000000<br>0xffff807fffffffff</td>
> <td class=reserved colspan=2>[256G] Reserved for future shared info with the
> guest OS (GUEST ACCESSIBLE)</td>
> </tr>
> <tr>
> <td class=addr>0xffff808000000000<br>0xffff80ffffffffff</td>
> <td class=reserved>[512G] Reserved for future use</td>
> <td class=ioremap>[512G] ioremap for PCI mmconfig space</td>
> </tr>
> <tr>
> <td class=addr>0xffff810000000000<br>0xffff817fffffffff</td>
> <td class=pagetable colspan=2>[512G] Guest linear page table</td>
> </tr>
> <tr>
> <td class=addr>0xffff818000000000<br>0xffff81ffffffffff</td>
> <td class=pagetable colspan=2>[512G] Shadow linear page table</td>
> </tr>
> <tr>
> <td class=addr>0xffff820000000000<br>0xffff827fffffffff</td>
> <td class=perdomain colspan=2>[512G] Per-domain mappings (e.g., GDT,
> LDT)</td>
> </tr>
> <tr>
> <td class=addr>0xffff828000000000<br>0xffff8283ffffffff</td>
> <td class=mpt>[16G] Machine-to-phys translation table</td>
> <td class=mpt rowspan=7>[256G] Machine-to-phys translation table</td>
> </tr>
> <tr>
> <td class=addr>0xffff828400000000<br>0xffff8287ffffffff</td>
> <td class=frametable>[16G] Page-frame information array</td>
> </tr>
> <tr>
> <td class=addr>0xffff828800000000<br>0xffff828bffffffff</td>
> <td class=ioremap>[16G] ioremap()/fixmap area</td>
> </tr>
> <tr>
> <td class=addr>0xffff828c00000000<br>0xffff828c3fffffff</td>
> <td class=compat>[1G] Compatibility machine-to-phys translation table</td>
> </tr>
> <tr>
> <td class=addr>0xffff828c40000000<br>0xffff828c7fffffff</td>
> <td class=compat>[1G] High read-only compat machine-to-phys translation
> table</td>
> </tr>
> <tr>
> <td class=addr>0xffff828c80000000<br>0xffff828cbfffffff</td>
> <td class=code>[1G] Xen text, static data, bss</td>
> </tr>
> <tr>
> <td class=addr>0xffff828cc0000000<br>0xffff82bfffffffff</td>
> <td class=reserved rowspan=7>[461G] Reserved for future use</td>
> </tr>
> <tr>
> <td class=addr>0xffff82c000000000<br>0xffff82c3ffffffff</td>
> <td class=ioremap>[16G] ioremap()/fixmap area</td>
> </tr>
> <tr>
> <td class=addr>0xffff82c400000000<br>0xffff82c43fffffff</td>
> <td class=compat>[1G] Compatibility machine-to-phys translation table</td>
> </tr>
> <tr>
> <td class=addr>0xffff82c440000000<br>0xffff82c47fffffff</td>
> <td class=compat>[1G] High read-only compat machine-to-phys translation
> table</td>
> </tr>
> <tr>
> <td class=addr>0xffff82c480000000<br>0xffff82c4bfffffff</td>
> <td class=code>[1G] Xen text, static data, bss</td>
> </tr>
> <tr>
> <td class=addr>0xffff82c4c0000000<br>0xffff82f5ffffffff</td>
> <td class=reserved>[197G] Reserved for future use</td>
> </tr>
> <tr>
> <td class=addr>0xffff82f600000000<br>0xffff82ffffffffff</td>
> <td class=frametable>[40G] Page-frame information array</td>
> </tr>
> <tr>
> <td class=addr>0xffff830000000000<br>0xffff83ffffffffff</td>
> <td class=direct>[1T] 1:1 direct mapping of all physical memory</td>
> <td class=direct rowspan=2>[5T] 1:1 direct mapping of all physical
> memory</td>
> </tr>
> <tr>
> <td class=addr>0xffff840000000000<br>0xffff87ffffffffff</td>
> <td class=reserved>[4T] Reserved for future use</td>
> </tr>
> <tr>
> <td class=addr>0xffff880000000000<br>0xffffffffffffffff</td>
> <td class=guest colspan=2>[120T] Guest-defined use</td>
> </tr>
> </tbody>
> </table>
> </body>
> </html>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxx
> http://lists.xen.org/xen-devel
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