On powernv hardware support for ISAv3.1 is advertised via a cpu feature bit in the device tree. This patch enables the associated HWCAP bit if the device tree indicates ISAv3.1 is available.
Signed-off-by: Alistair Popple <alist...@popple.id.au> --- arch/powerpc/kernel/dt_cpu_ftrs.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c index 36bc0d5c4f3a..b5e21264d168 100644 --- a/arch/powerpc/kernel/dt_cpu_ftrs.c +++ b/arch/powerpc/kernel/dt_cpu_ftrs.c @@ -26,6 +26,7 @@ /* Device-tree visible constants follow */ #define ISA_V2_07B 2070 #define ISA_V3_0B 3000 +#define ISA_V3_1 3100 #define USABLE_PR (1U << 0) #define USABLE_OS (1U << 1) @@ -654,6 +655,11 @@ static void __init cpufeatures_setup_start(u32 isa) cur_cpu_spec->cpu_features |= CPU_FTR_ARCH_300; cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_ARCH_3_00; } + + if (isa >= 3100) { + cur_cpu_spec->cpu_features |= CPU_FTR_ARCH_31; + cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_ARCH_3_1; + } } static bool __init cpufeatures_process_feature(struct dt_cpu_feature *f) -- 2.20.1