On Fri, 2 Feb 2024, Jiaxun Yang wrote: > MIPS MT ASE is only available on ISA between Release 1 and Release 5. R2+ only actually, as also evident from Kconfig... > --- a/arch/mips/Kconfig > +++ b/arch/mips/Kconfig > @@ -2171,7 +2171,8 @@ config CPU_R4K_CACHE_TLB > config MIPS_MT_SMP > bool "MIPS MT SMP support (1 TC on each available VPE)" > default y > - depends on SYS_SUPPORTS_MULTITHREADING && !CPU_MIPSR6 && !CPU_MICROMIPS > + depends on TARGET_ISA_REV > 0 && TARGET_ISA_REV < 6 > + depends on SYS_SUPPORTS_MULTITHREADING && !CPU_MICROMIPS > select CPU_MIPSR2_IRQ_VI > select CPU_MIPSR2_IRQ_EI ^^^^^^ ... here. I wish people looked beyond the line they change, sigh... Maciej