On Wed, Sep 26, 2018 at 10:59:49AM -0700, Dennis Dalessandro wrote: > From: Mitko Haralanov <mitko.haralanov@xxxxxxxxx> > > With previous version of the HFI driver, user level tools > which required access to the device's BAR made use of the > 'resourceXX' files provided by the core kernel in sysfs. > > However, recent distro kernels have started compiling and > distributing their kernels with CONFIG_STRICT_IO_DEVMEM > turned on. This isn't even the right description, CONFIG_STRICT_IO_DEVMEM has to do with /dev/mem, not resourceX - resourceX is blocked off these days because of secure boot, and the reason is to prevent tampering with the kernel ie via user controlled DMAs. Jason
