From: Nadav Amit <namit@cs.technion.ac.il>
Date: Thu, 2 Oct 2014 22:10:03 +0000 (+0300)
Subject: KVM: x86: Emulator performs code segment checks on read access
X-Git-Tag: omap-for-v3.20/drop-legacy-3517~40^2~105
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c49c759f7a68b70d2fed019760a66843b3df39b8;p=pandora-kernel.git

KVM: x86: Emulator performs code segment checks on read access

When read access is performed using a readable code segment, the "conforming"
and "non-conforming" checks should not be done.  As a result, read using
non-conforming readable code segment fails.

This is according to Intel SDM 5.6.1 ("Accessing Data in Code Segments").

The fix is not to perform the "non-conforming" checks if the access is not a
fetch; the relevant checks are already done when loading the segment.

Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

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