[Xen-users] Memory Management

To:	ska@xxxxxx
Subject:	[Xen-users] Memory Management
From:	Security Initiative Team <passrete@xxxxxxxxx>
Date:	Sun, 14 Jan 2007 12:48:13 -0800 (PST)
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Hi Simon,

On the Xen wiki :
http://wiki.xensource.com/xenwiki/XenMemoryManagement

Why is it that only L2 page tables are pinned?

HYPERVISOR_mmuext_op(MMUEXT_PIN_L2_TABLE, pgtab_mach_addr, ...);

I know that L2 on a 32-bit x86 system without PAE 
is the PGD.
So, why is it that the leaf-pages (PTE), i.e. L1, aren't
pinned.

Isn't it the pinning that makes page tables read-only?

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[Xen-users] Memory Management