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    KVM: Enable snooping control for supported hardware · 522c68c4
    Sheng Yang 提交于
    Memory aliases with different memory type is a problem for guest. For the guest
    without assigned device, the memory type of guest memory would always been the
    same as host(WB); but for the assigned device, some part of memory may be used
    as DMA and then set to uncacheable memory type(UC/WC), which would be a conflict of
    host memory type then be a potential issue.
    
    Snooping control can guarantee the cache correctness of memory go through the
    DMA engine of VT-d.
    
    [avi: fix build on ia64]
    Signed-off-by: NSheng Yang <sheng@linux.intel.com>
    Signed-off-by: NAvi Kivity <avi@redhat.com>
    522c68c4
kvm_host.h 15.1 KB