143b8774dSPaul Mundtconfig INTC_USERIMASK 243b8774dSPaul Mundt bool "Userspace interrupt masking support" 343b8774dSPaul Mundt depends on ARCH_SHMOBILE || (SUPERH && CPU_SH4A) 443b8774dSPaul Mundt help 543b8774dSPaul Mundt This enables support for hardware-assisted userspace hardirq 643b8774dSPaul Mundt masking. 743b8774dSPaul Mundt 843b8774dSPaul Mundt SH-4A and newer interrupt blocks all support a special shadowed 943b8774dSPaul Mundt page with all non-masking registers obscured when mapped in to 1043b8774dSPaul Mundt userspace. This is primarily for use by userspace device 1143b8774dSPaul Mundt drivers that are using special priority levels. 1243b8774dSPaul Mundt 1343b8774dSPaul Mundt If in doubt, say N. 14