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powerpc/dt_cpu_ftrs: Advertise support for ISA v3.1 if selected 

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 <alistair@popple.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200521014341.29095-4-alistair@popple.id.au
This commit is contained in:
Alistair Popple 2020-05-21 11:43:37 +10:00 committed by Michael Ellerman
parent 3fd5836ee8
commit 43d0d37acb
1 changed files with 6 additions and 0 deletions
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6
arch/powerpc/kernel/dt_cpu_ftrs.c
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@ -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)
@ -662,6 +663,11 @@ 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)