Commit ce98a677 authored by Suzuki K. Poulose's avatar Suzuki K. Poulose Committed by Catalin Marinas

arm64: Handle width of a cpuid feature

Introduce a helper to extract cpuid feature for any given
width.
Signed-off-by: default avatarSuzuki K. Poulose <suzuki.poulose@arm.com>
Tested-by: default avatarDave Martin <Dave.Martin@arm.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 12d11817
......@@ -76,10 +76,16 @@ static inline void cpus_set_cap(unsigned int num)
__set_bit(num, cpu_hwcaps);
}
static inline int __attribute_const__ cpuid_feature_extract_field(u64 features,
int field)
static inline int __attribute_const__
cpuid_feature_extract_field_width(u64 features, int field, int width)
{
return (s64)(features << (64 - 4 - field)) >> (64 - 4);
return (s64)(features << (64 - width - field)) >> (64 - width);
}
static inline int __attribute_const__
cpuid_feature_extract_field(u64 features, int field)
{
return cpuid_feature_extract_field_width(features, field, 4);
}
static inline bool id_aa64mmfr0_mixed_endian_el0(u64 mmfr0)
......
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