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Re: [Xen-devel] xen and cr0,cr3,cr4

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] xen and cr0,cr3,cr4
From: Adam Sulmicki <adam@xxxxxxxxxxxx>
Date: Mon, 29 Nov 2004 17:31:01 -0500 (EST)
Cc: Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxxx>
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> > All dandy and nice. now the weird part is that if I try to list Page Table
> > entries referenced by by Page Directory in either setup I get an ooops
> > saying that the referneced Page Table is not in memory.
> >
> > No such problems in linux classic... weird.
> How are you converting the address in the PDE into something you can
> dereference? You should be using machine_to_virt() (*not*
> phys_to_virt()).

yeah, that definitely helps, in so far that I was able to list low
memory, ie 0-(4gb-64), but it still seems to get confused once it gets
into xen space...

PD 0x313-0x3EE[0x00000000]V:3148M-4028M-1>P:????M-????M-1 S:0880MB F:__
PD 0x3EF-0x3EF[0x02c10067]V:4028M-4032M-1>P:++++M-++++M-1 S:0004MB F:PK
  Printing Page Table (0x3EF)
  PT Base Address (physical): 0x02C10000
  PT Base Address (virtual) : 0xC0010000
  PT 000-2FA V:4028M.0000K-4030M.1004K-1>P:!!!!!!!!!!K-!!!!!!!!!!K-1 S:3052K F:_
  PT 2FB-3FA V:4030M.1004K-4031M.1004K-1>P:0000M.0000K-0001M.0000K-1 S:1024K F:P
  PT 3FB-3FB V:4031M.1004K-4031M.1008K-1>P:!!!!!!!!!!K-!!!!!!!!!!K-1 S:0004K F:_
  PT 3FC-3FC V:4031M.1008K-4031M.1012K-1>P:0005M.0952K-0005M.0956K-1 S:0004K F:P
  PT 3FD-3FD V:4031M.1012K-4031M.1016K-1>P:0060M.0840K-0060M.0844K-1 S:0004K F:P
  PT 3FE-3FF V:4031M.1016K-4032M.0000K-1>P:!!!!!!!!!!K-!!!!!!!!!!K-1 S:0008K F:_
PD 0x3F0-0x3F0[0x004f9021]V:4032M-4036M-1>P:++++M-++++M-1 S:0004MB F:PK
  Printing Page Table (0x3F0)
  PT Base Address (physical): 0x004F9000
  PT Base Address (virtual) : 0x15555000
Unable to handle kernel paging request at virtual address 15555000

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