Re: [Xen-devel] Re: Oops when loading xen_platform_pci module in HVM domain on CS 11429

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 7/9/06 21:04, "Steve Dobbelstein" <steved@xxxxxxxxxx> wrote:

> I tried hacking some code to turn off the NX bit in the PTE for the
> hypercall stubs page, but I still get the oops.  I'm thinking it's because
> the NX bit is set in the PMD.
> 
> I'm quite new to the paging mechanism, so I'm not sure how to fix this at
> the moment.   I'll keep poking around.  thought I'd share my findings so
> far.

Page directory entries use permissions _PAGE_TABLE, which does not include
_PAGE_NX. So clearing _PAGE_NX from the PTEs, using
change_page_attr(PAGE_KERNEL_EXEC), should suffice.

 -- Keir



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