Change Details

QEMU emulates Hyper-V [1] but lacks vmbus_res, thus no coherence information available. Add NULL check for it and fallback to no coherence. 1. https://www.qemu.org/docs/master/system/i386/hyperv.html PR: 274810 Diagnosed by: mhorne Fixes: e7a9817b8d32 Hyper-V: vmbus: implementat bus_get_dma_tag in vmbus MFC after: 3 days

QEMU emulates Hyper-V [1] but lacks vmbus_res, thus no coherence information available. Add NULL check for it and fallback to no coherence. 1. https://www.qemu.org/docs/master/system/i386/hyperv.html PR: [[https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274810|274810]] Diagnosed by: mhorne Fixes: e7a9817b8d32 Hyper-V: vmbus: implementat bus_get_dma_tag in vmbus MFC after: 3 days

QEMU emulates Hyper-V [1] but lacks vmbus_res, thus no coherence information available. Add NULL check for it and fallback to no coherence. 1. https://www.qemu.org/docs/master/system/i386/hyperv.html PR: [[https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274810|274810]] Diagnosed by: mhorne Fixes: e7a9817b8d32 Hyper-V: vmbus: implementat bus_get_dma_tag in vmbus MFC after: 3 days