On Tue, 28 Apr 2015 21:57:31 +0000 "James (Fei) Liu-SSI" <james.liu at ssi.samsung.com> wrote:
> Hi All, > We are porting driver from kernel into user space driver with DPDK for > one of our devices. Polling thread works fine without any issue. However, we > want to switch from polling to interrupt based handler. While we enable > interrupt with VFIO MSIx, we always get below errors after issuing one > command: > > [ 465.464186] dmar: DRHD: handling fault status reg 2 > [ 465.464194] dmar: INTR-REMAP: Request device [[02:00.0] fault index 27 > [ 465.464194] INTR-REMAP:[fault reason 34] Present field in the IRTE entry > is clear > > Here are steps we follow to enable interrupt: > 1. --vfio-intr msix was passed in as parameter for rte_eal_init > 2. rte_intr_enable was called during the drive probe stage. > 3. rte_intr_callback_register was called after interrupt was enabled > > > > Is there anyone in the forum who worked on the interrupt handler to share > with us about your comments? thanks for your help in advance. Do you have kernel version in your build environment that has <linux/vfio.h> ? Do you have iommu enabled on your target machine? Did you program the MSI-X correctly?
