Hi Thomas, > 2014-05-27 14:29, Burakov, Anatoly: > > > > I don't know if there is something defined in a Linux header which > > > > could help to check if VFIO is supported. But in general, it's > > > > better to check for a macro belonging to the feature instead of checking > kernel version. > > > > > > Not sure VFIO defines any macros anywhere, but I'll look into it, thanks. > > > > There probably isn't. At least I don't see anything in commit log. So > > unless there's a way to get config options from kernel at compile-time > > in userspace code, I don't think we can do anything else than kernel > > version check. > > Isn't it sufficient to check VFIO_API_VERSION?
I believe you have to #include <linux/vfio.h> before you can get that macro. The header file isn't present on kernels earlier than 3.6. Best regards, Anatoly Burakov DPDK SW Engineer