From: Sheng Yang <sheng@linux.intel.com>
Date: Wed, 30 Jun 2010 04:25:15 +0000 (+0800)
Subject: KVM: VMX: Execute WBINVD to keep data consistency with assigned devices
X-Git-Tag: v2.6.36-rc1~580^2~51
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f5f48ee15c2ee3e44cf429e34b16c6fa9b900246;p=pandora-kernel.git

KVM: VMX: Execute WBINVD to keep data consistency with assigned devices

Some guest device driver may leverage the "Non-Snoop" I/O, and explicitly
WBINVD or CLFLUSH to a RAM space. Since migration may occur before WBINVD or
CLFLUSH, we need to maintain data consistency either by:
1: flushing cache (wbinvd) when the guest is scheduled out if there is no
wbinvd exit, or
2: execute wbinvd on all dirty physical CPUs when guest wbinvd exits.

Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---

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