Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

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

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

arch/arm64/include/asm/cpufeature.h

+9 −3
Original line number Diff line number Diff line
@@ -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)