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authorSheng Yang <sheng@linux.intel.com>2009-04-27 14:35:43 +0200
committerAvi Kivity <avi@redhat.com>2009-06-10 10:48:50 +0200
commit522c68c4416de3cd3e11a9ff10d58e776a69ae1e (patch)
tree62940e35988f5e2a52df10276882ec64518ee369 /init
parentKVM: Replace get_mt_mask_shift with get_mt_mask (diff)
downloadlinux-522c68c4416de3cd3e11a9ff10d58e776a69ae1e.tar.xz
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KVM: Enable snooping control for supported hardware
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: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
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