From: Paolo Bonzini <pbonzini@redhat.com>
Date: Tue, 2 Sep 2014 11:23:06 +0000 (+0200)
Subject: KVM: x86: propagate exception from permission checks on the nested page fault
X-Git-Tag: fixes-for-v3.18-merge-window~23^2~45
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=54987b7afa902e886b3a751c056c2a4d4701020e;p=pandora-kernel.git

KVM: x86: propagate exception from permission checks on the nested page fault

Currently, if a permission error happens during the translation of
the final GPA to HPA, walk_addr_generic returns 0 but does not fill
in walker->fault.  To avoid this, add an x86_exception* argument
to the translate_gpa function, and let it fill in walker->fault.
The nested_page_fault field will be true, since the walk_mmu is the
nested_mmu and translate_gpu instead operates on the "outer" (NPT)
instance.

Reported-by: Valentine Sinitsyn <valentine.sinitsyn@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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