Re: [Xen-devel] [PATCH v6 2/4] x86/hvm: Treat non-instruction fetch nested page faults also as read violations

[Tamas Lengyel <tamas.lengyel@xxxxxxxxxxxx>]

Ah, no, clearly not: Again - read-modify-write instructions _have_
to be reported as being reads and writes. Reporting simply writes
as reads too is the smaller of the two "evils" here. If anything we
could introduce a "maybe-read" flag that gets set when don't know
for sure.

I think an explicit comment in VMX and SVM code explaining why the bits are set the way they are may be sufficient (I know this is mentioned in the commit message but having it in the code is better IMO).

-boris

I can certainly do that if the consensus is to include the patch.

Tamas 

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