Hello,
On Thu, Sep 17, 2020 at 12:32 PM Dybkowski, AdamX <adamx.dybkow...@intel.com> wrote: > > Hi. > > > -----Original Message----- > > From: dev <dev-boun...@dpdk.org> On Behalf Of Sarosh Arif > > Sent: Thursday, 17 September, 2020 08:53 > > To: dev@dpdk.org > > Subject: [dpdk-dev] unable to bind to vfio-pci > > > > I have been trying to bind to vfio-pci using usertools/dpdk-devbind.py but > > am unable to do so. The reason behind this is that I am unable to write in > > /sys/bus/pci/drivers/vfio-pci/bind. Upon searching solutions I tried a > > couple > > of things such as setting iommu=pt and intel_iommu=on and ensured vt-d is > > enabled. > > [Adam] First thing: to check if VT-d is enabled in Linux, you can read MSR > 0x3a register. Its lowest bit set will show VT-d works: > > (optionally on Ubuntu: apt-get install msr-tools) > modprobe msr > rdmsr 0x3a > 3 or 5 -> OK > > Other possible way to check for VT-d (IOMMU) working is to view the booting > log (dmesg): > > dmesg | grep DMAR > "DMAR: IOMMU enabled" -> OK > I used this method to check and vt-d is enabled. Is there anything else that I can do? > Both of these should be met in order to use vfio-pci in the next step. > > > Along with this I have made sure that the vfio-pci module is correctly > > loaded. > > I have also tried > > > > chmod 666 /sys/bus/pci/drivers/vfio-pci/bind > > > > So that I have permissions to write in this file. > > > > The error I get when I use usertools/dpdk-devbind.py to bind is this: > > Error: bind failed for 0000:b7:00.1 - Cannot bind to driver vfio-pci > > > > The details of 0000:b7:00.1 are as follows: > > Ethernet Connection X722 for 10GBASE-T 37d2' if=eno6 drv=i40e > > > > I have also unbinded The pci bridge to which 0000:b7:00.1 was connected. > > > > What more can be done to resolve this? > > > > Regards, > > Sarosh Arif > > Adam Dybkowski >