Re: [Xen-devel] SVM NPT mem_access and npfec.insn_fetch

[Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>]

On 03/31/2018 12:52 AM, Andrew Cooper wrote:
> Well... If you don't set the real permissions bits, how is hardware
> going to know that you don't want this page to be executed, and raise a
> nested page fault in the first place?

Right, it's obvious in retrospect. We were fooled by the way it seemed
to have worked for page writes out-of-the-box.


Thanks,
Razvan

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