How to mask the PCI bus/slot/functions of the passed through devices on the DFLY
Mario Marietto
marietto2008 at gmail.com
Wed Dec 22 09:31:11 PST 2021
How to mask the PCI bus/slot/functions of the passed through devices on the
DFLY
Hello to everyone.
I have installed dragonflybsd 6.1 development version phisycally on my PC
using the Hammer2 fs,using the commands below :
cd /usr
rm -rf src
git clone git://git.dragonflybsd.org/dragonfly.git src
make buildworld
make buildkernel
make installkernel
make installworld
make upgrade
Rebooted
pkg update
pkg upgrade
What I would like to do is to test how good is the passthrough of my nvidia
graphic card inside a Linux VM using qemu and NVMM on the DFLY. First of
all,I've added :
"i915_load="YES"
to /etc/rc.conf
because the graphic card that I use on the host os is the UHD Graphics
630,as u can see below :
vgapci1 at pci0:0:2:0: class=0x030000 card=0xd0001458 chip=0x3e988086 rev=0x02
hdr=0x00
vendor = 'Intel Corporation'
device = 'CoffeeLake-S GT2 [UHD Graphics 630]'
class = display subclass = VGA
But I have another GPU,but I want to use it as secondary,since I want to
try to pass through it with Qemu. it is the GeForce RTX 2080Ti that u can
see below :
vgapci0 at pci0:2:0:0: class=0x030000 card=0x250319da chip=0x1e0410de rev=0xa1
hdr=0x00
vendor = 'NVIDIA Corporation'
device = 'TU102 [GeForce RTX 2080 Ti]'
class = display subclass = VGA
If you want to see all the hardware specifications of my PC,you can give a
look here :
https://pastebin.ubuntu.com/p/PQRYbCh7Wr/
Now,I didn't find any good informations about the passthrough of the
devices on the DFLY howTos. Since it is a BSD derived os,I supposed that
the developers had implemented the masking of the PCI device at
bus/slot/functions,adding a parameter like that below inside the file
/boot/loader.conf ;
pptdevs="2/0/0 2/0/1 2/0/2 2/0/3"
but it didn't work. So,what's the correct method to do that ? thanks.
--
Mario.
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