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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