Re: [Xen-devel] crash on boot with 4.6.1 on fedora 24

[Juergen Gross <jgross@xxxxxxxx>]

On 10/05/16 15:57, Jan Beulich wrote:
>>>> On 10.05.16 at 15:39, <boris.ostrovsky@xxxxxxxxxx> wrote:
>> I didn't finish unwrapping the stack yesterday. Here it is:
>>
>> setup_arch -> dmi_scan_machine -> dmi_walk_early -> early_ioremap
> 
> Ah, that makes sense. Yet why would early_ioremap() involve an
> M2P lookup? As said, MMIO addresses shouldn't be subject to such
> lookups.

early_ioremap()->
  __early_ioremap()->
    __early_set_fixmap()->
      set_pte()->
        xen_set_pte_init()->
          mask_rw_pte()->
            pte_pfn()->
              pte_val()->
                xen_pte_val()->
                  pte_mfn_to_pfn()


Juergen

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