Date: Fri, 11 May 2018 17:26:41 +0200 From: Felix Palmen <felix@palmen-it.de> To: freebsd-virtualization@freebsd.org Subject: bhyve: passthrough of PCIe device without MSI possible? Message-ID: <7167ea46-ee07-8ffa-615e-0f3d3eb92e64@palmen-it.de>
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I have the following PCIe card on a host running 11.1-RELEASE: | ppt0@pci0:5:0:0: class=0x078000 card=0x00011b74 chip=0x08101b74 rev=0x14 hdr=0x00 | vendor = 'OpenVox Communication Co. Ltd.' | class = simple comms it doesn't support MSI according to `pciconf -lbc`: | ppt0@pci0:5:0:0: class=0x078000 card=0x00011b74 chip=0x08101b74 rev=0x14 hdr=0x00 | bar [10] = type Memory, range 32, base 0xdfe00000, size 524288, enabled Trying to pass this card to a guest using `vm-bhyve` gives me the following in `bhyve.log`: | bhyve: failed to initialize MSI for PCI 5/0/0 and this in `vm-byve.log`: | [bhyve options: -c 2 -m 2G -Hwl bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI.fd -U 9f2546f5-5464-11e8-8b52-d05099c0f275 -S] | [bhyve devices: -s 0,hostbridge -s 31,lpc -s 4:0,virtio-blk,/dev/zvol/zroot/vm/pbx/disk0 -s 5:0,virtio-net,tap2,mac=58:9c:fc:00:d7:6b -s 6:0,passthru,5/0/0 -s 7:0,fbuf,tcp=0.0.0.0:5900] | [bhyve console: -l com1,/dev/nmdm0A] | [bhyve iso device: -s 3:0,ahci-cd,/var/vm/.config/null.iso] | starting bhyve (run 1) | bhyve exited with status 1 Now .. is it actually possible to pass such a device to a bhyve guest? From the code comment here: <https://github.com/freebsd/freebsd/blob/master/usr.sbin/bhyve/pci_passthru.c#L257>; I assumed MSI would be "emulated" if necessary? TIA, Felix -- Dipl.-Inform. Felix Palmen <felix@palmen-it.de> ,.//.......... {web} http://palmen-it.de {jabber} [see email] ,//palmen-it.de {pgp public key} http://palmen-it.de/pub.txt // """"""""""" {pgp fingerprint} ED9B 62D0 BE39 32F9 2488 5D0C 8177 9D80 5ECF F683
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