My platform is T1042, and I used a pcie card in my board. But the pcie isr only be serviced in one CPU core, so I want
distribute irq to all CPU cores to offload my own pcie card services on one dedicate CPU core(it seems allways be core0).
I tried to set /proc/irq/xx/smp_affinity but it doesn't work.
After I look one old FTF (http://www.nxp.com/files-static/training_pdf/WBNR_FTF10_ENT_F0697.pdf), so I enabled CONFIG_IRQ_ALL_CPUS in my kernel config and reprogrammed it in to my board, but it also doesn't work.
So, my question is: what should I do to enable irq distribute all CPU cores.
Thanks for you reply.