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[Xen-devel] Set NX bit for a PTE.
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
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| Subject: | [Xen-devel] Set NX bit for a PTE. |
| From: | Necrosoft <necrosoft@xxxxxx> |
| Date: | Thu, 12 Jun 2008 15:08:30 +0200 |
| Delivery-date: | Thu, 12 Jun 2008 06:09:08 -0700 |
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Hi I would set the NX bit for a kernel pte in a PV domain. I try to do that from dom0 walking the page table: when l1e = l1[l1_table_offset_pae(va)]; is reached I try to overwrite this entry (l1[l1_table_offset_pae(va)] = l1e_NX) but I receive a "segmentation fault" and PV domain crash. The address seems to be correct (l1 is not unmapped). In PAE mode page table walk work fine. For example I can print the following informations: domU Kernel Address: c0105448 l1e: 17489063 l1 address mapped: b7fab000 l1 offset: 105 write on: b7fab105 Segmentation Fault I can write a pte from dom0 or I must do that only from the hypervisor? Thank you very much for any idea. Bye _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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