As the comment in commit 3301edcb says, DSP and MDMX share the same config flag bit. Without this set, MDMX instructions cause Illegal instruction errors. Signed-off-by: Matt Turner <mattst88@xxxxxxxxx> --- Is MDMX implemented by anything other than some Broadcom CPUs? Is it totally replaced by DSP? I had a terrible time finding any documentation on it (which is annoying because Volume IV-b covering MDMX is referenced by all the MIPS64 documents.) but finally found a copy here: www.enlight.ru/docs/cpu/risc/mips/MDMXspec.pdf If it's dead, it's too bad because it's a pretty cool ISA. arch/mips/kernel/traps.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index cfdaaa4..89ead75 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -1548,7 +1548,7 @@ void __cpuinit per_cpu_trap_init(void) #endif if (current_cpu_data.isa_level == MIPS_CPU_ISA_IV) status_set |= ST0_XX; - if (cpu_has_dsp) + if (cpu_has_dsp || cpu_has_mdmx) status_set |= ST0_MX; change_c0_status(ST0_CU|ST0_MX|ST0_RE|ST0_FR|ST0_BEV|ST0_TS|ST0_KX|ST0_SX|ST0_UX, -- 1.7.3.4
