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Re: [Xen-devel] Mini-OS: new_pt_frame fails

  • To: Julian Stecklina <der_julian@xxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir@xxxxxxxxxxxxx>
  • Date: Thu, 08 Mar 2007 14:49:10 +0000
  • Delivery-date: Thu, 08 Mar 2007 06:48:25 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcdhkO4HLIgS+c2EEduQtwAX8io7RQ==
  • Thread-topic: [Xen-devel] Mini-OS: new_pt_frame fails

On 8/3/07 14:32, "Julian Stecklina" <der_julian@xxxxxx> wrote:

> Mapping memory range 0xc0400000 - 0xc1000000
> MINI_OS(file=mm.c, line=68) Allocating new L1 pt frame for pt_pfn=36,
> mfn=ca8, prev_l_mfn=cad, offset=301
> (XEN) .../xen-3.0.4-testing.hg/xen/include/asm/mm.h:184:d1 Error pfn 0:
> rd=ffbe8100, od=ffbf4100, caf=80000002, taf=e8000002
> (XEN) mm.c:456:d1 Could not get page ref for pfn 0
> (XEN) mm.c:2225:d1 Could not get page for normal update
> New PT could not be mapped R/W.

'pfn 0' (actually it's mfn 0) looks suspicious. Like you passed the wrong
ptr value to the mmu_update.

 -- Keir

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