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Re: [Xen-devel] [PATCH RFC V4 1/5] xen: Emulate with no writes
- To: Jan Beulich <JBeulich@xxxxxxxx>
- From: Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>
- Date: Wed, 06 Aug 2014 11:42:00 +0300
- Cc: kevin.tian@xxxxxxxxx, ian.campbell@xxxxxxxxxx, stefano.stabellini@xxxxxxxxxxxxx, andrew.cooper3@xxxxxxxxxx, eddie.dong@xxxxxxxxx, xen-devel@xxxxxxxxxxxxx, jun.nakajima@xxxxxxxxx, ian.jackson@xxxxxxxxxxxxx
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- Delivery-date: Wed, 06 Aug 2014 08:42:22 +0000
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On 08/05/2014 06:43 PM, Jan Beulich wrote:
> it. And quite different from your case - you want the instruction to
> behave normally _except_ for the memory write as I understood so far
> (albeit it still escapes me how in the end correct behavior can result).
The scenario in such cases is quite special: the decision to emulate
without writing is usually made for things such as rootkits, and
allowing a rogue application to go ahead with a write generally means
allowing it to do bad things - so in that case the alternative is
preferable.
Thanks,
Razvan Cojocaru
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