Prefix instructions have their own FSCR bit which needs to enabled via a CPU feature. The kernel will save the FSCR for problem state but it needs to be enabled initially.
Signed-off-by: Alistair Popple <alist...@popple.id.au> --- arch/powerpc/kernel/dt_cpu_ftrs.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c index dede8f0b678f..e4caa4456869 100644 --- a/arch/powerpc/kernel/dt_cpu_ftrs.c +++ b/arch/powerpc/kernel/dt_cpu_ftrs.c @@ -627,6 +627,7 @@ static struct dt_cpu_feature_match __initdata {"vector-binary128", feat_enable, 0}, {"vector-binary16", feat_enable, 0}, {"wait-v3", feat_enable, 0}, + {"prefix-instructions", feat_enable, 0}, }; static bool __initdata using_dt_cpu_ftrs; -- 2.20.1