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| author | Julien Thierry <julien.thierry@arm.com> | 2019-01-31 15:58:42 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2019-02-06 11:05:17 +0100 |
| commit | b90d2b22afdc7ce150a9ee7a8d82378bcfc395a5 (patch) | |
| tree | 6fb23cda3751a6912b1b4ae1b9da6efcea1ff69c /arch/arm64/kernel/cpufeature.c | |
| parent | arm64: cpufeature: Set SYSREG_GIC_CPUIF as a boot system feature (diff) | |
| download | linux-b90d2b22afdc7ce150a9ee7a8d82378bcfc395a5.tar.xz linux-b90d2b22afdc7ce150a9ee7a8d82378bcfc395a5.zip | |
arm64: cpufeature: Add cpufeature for IRQ priority masking
Add a cpufeature indicating whether a cpu supports masking interrupts
by priority.
The feature will be properly enabled in a later patch.
Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel/cpufeature.c')
| -rw-r--r-- | arch/arm64/kernel/cpufeature.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index b9c0adf71a54..6f56e0ab63a1 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1203,6 +1203,14 @@ static void cpu_enable_address_auth(struct arm64_cpu_capabilities const *cap) } #endif /* CONFIG_ARM64_PTR_AUTH */ +#ifdef CONFIG_ARM64_PSEUDO_NMI +static bool can_use_gic_priorities(const struct arm64_cpu_capabilities *entry, + int scope) +{ + return false; +} +#endif + static const struct arm64_cpu_capabilities arm64_features[] = { { .desc = "GIC system register CPU interface", @@ -1480,6 +1488,21 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .matches = has_cpuid_feature, }, #endif /* CONFIG_ARM64_PTR_AUTH */ +#ifdef CONFIG_ARM64_PSEUDO_NMI + { + /* + * Depends on having GICv3 + */ + .desc = "IRQ priority masking", + .capability = ARM64_HAS_IRQ_PRIO_MASKING, + .type = ARM64_CPUCAP_STRICT_BOOT_CPU_FEATURE, + .matches = can_use_gic_priorities, + .sys_reg = SYS_ID_AA64PFR0_EL1, + .field_pos = ID_AA64PFR0_GIC_SHIFT, + .sign = FTR_UNSIGNED, + .min_field_value = 1, + }, +#endif {}, }; |