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vmm: Add iommu=on|off option for --device

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Having the virtual IOMMU created with --iommu is one thing, but we also
need a way to decide if a VFIO device should be attached to the virtual
IOMMU or not. That's why we introduce an extra option "iommu" with the
value "on" or "off". By default, the device is not attached, which means
"iommu=off".

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf
2019-10-07 09:03:58 -07:00
committed by Samuel Ortiz
parent 3bb51d4d5e
commit 5fc3f37c9b
5 changed files with 32 additions and 4 deletions
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docs/vfio.md
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@@ -72,7 +72,7 @@ takes the device's sysfs path as an argument. In our example it is
--cmdline "console=ttyS0 reboot=k panic=1 nomodules i8042.noaux i8042.nomux i8042.nopnp i8042.dumbkbd root=/dev/vda3" \
--cpus 4 \
--memory size=512M \
--device /sys/bus/pci/devices/0000:01:00.0/
--device path=/sys/bus/pci/devices/0000:01:00.0/
```
The guest kernel will then detect the card reader on its PCI bus and provided