From: Nadav Amit <namit@cs.technion.ac.il>
Date: Mon, 13 Oct 2014 10:04:13 +0000 (+0300)
Subject: KVM: x86: Emulator does not decode clflush well
X-Git-Tag: fixes-against-v3.18-rc2~9^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=13e457e0eebf0a0c82c38ceb890d93eb826d62a6;p=pandora-kernel.git

KVM: x86: Emulator does not decode clflush well

Currently, all group15 instructions are decoded as clflush (e.g., mfence,
xsave).  In addition, the clflush instruction requires no prefix (66/f2/f3)
would exist. If prefix exists it may encode a different instruction (e.g.,
clflushopt).

Creating a group for clflush, and different group for each prefix.

This has been the case forever, but the next patch needs the cflush group
in order to fix a bug introduced in 3.17.

Fixes: 41061cdb98a0bec464278b4db8e894a3121671f5
Cc: stable@vger.kernel.org
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

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