From: Stuart Brady <sdbrady@ntlworld.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [4239] x86/x86-64 MMU PAE fixes
Date: Tue, 22 Apr 2008 23:37:17 +0100 [thread overview]
Message-ID: <20080422223717.GA23306@miranda.arrow> (raw)
In-Reply-To: <20080422221924.GA23201@miranda.arrow>
On Tue, Apr 22, 2008 at 11:19:24PM +0100, Stuart Brady wrote:
> The documentation I'm using:
>
> "Intel 64 and IA-32 Architectures Software Development Manual,
> Volume 3A: System Programming Guide, Part 1"
...
"AMD64 Architecture Programmer's Manual, Volume 2: System Programming"
gives a different story.
Only bits 52-63 are reserved (MBZ), although for PDEs and PTEs (but not
PDPEs, it would seem), bit 63 is the NX bit.
However, "The AMD x86-64 Architecture Programmers Overview" says that
"bits 63:52 in all page-table entry formats are available for use by
system software".
--
Stuart Brady
prev parent reply other threads:[~2008-04-22 22:37 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-22 20:37 [Qemu-devel] [4239] x86/x86-64 MMU PAE fixes Aurelien Jarno
2008-04-22 20:57 ` Paul Brook
2008-04-22 22:19 ` Stuart Brady
2008-04-22 22:29 ` Paul Brook
2008-04-22 22:37 ` Stuart Brady [this message]
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