Zhenlei Huang 1969d82fcf Hyper-V: vmbus: Add NULL check for vmbus_res ... QEMU emulates Hyper-V [1] but lacks the emulation for vmbus_res, thus no coherence information is available. Add NULL check for it and fallback to no coherence. This will prevent FreeBSD guests from panic on QEMU with the Hyper-V enlightenment hv-synic enabled. For real Hyper-V, both gen1 and gen2 have vmbus_res then they are not affected by this change. 1. https://www.qemu.org/docs/master/system/i386/hyperv.html PR: 274810 Reviewed by: mhorne, emaste, delphij, whu Diagnosed by: mhorne Fixes: e7a9817b8d32 Hyper-V: vmbus: implementat bus_get_dma_tag in vmbus Insta-MFC approved by: re (delphij) for 14.0-RC4 Differential Revision: https://reviews.freebsd.org/D42414 (cherry picked from commit 63bf943d4af17799cef21e2bb78dd28003ce1ce5)		2023-11-02 17:10:03 +08:00
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aarch64
amd64
i386
x86
hyperv.c
hyperv_busdma.c
hyperv_common_reg.h
hyperv_var.h
vmbus.c
vmbus_br.c
vmbus_brvar.h
vmbus_chan.c
vmbus_chanvar.h
vmbus_et.c
vmbus_if.m
vmbus_reg.h
vmbus_res.c
vmbus_var.h
vmbus_xact.c