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Subject[PATCH 3/3] arm64/fpsimd: Use ID_AA64PFR0_EL1_.* macros
Date
The 26d75e67c commit (arm64/cpufeature.h: Add macros for a cpu features
testing) provides set of macros for the testing processor's FP and advanced
SIMD features.

Let's use these macros instead of direct calculation.

Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com>
---
arch/arm64/kernel/fpsimd.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
index 44d6f75..12943a5 100644
--- a/arch/arm64/kernel/fpsimd.c
+++ b/arch/arm64/kernel/fpsimd.c
@@ -27,6 +27,7 @@

#include <asm/fpsimd.h>
#include <asm/cputype.h>
+#include <asm/cpufeature.h>

#define FPEXC_IOF (1 << 0)
#define FPEXC_DZF (1 << 1)
@@ -333,13 +334,13 @@ static int __init fpsimd_init(void)
{
u64 pfr = read_cpuid(ID_AA64PFR0_EL1);

- if (pfr & (0xf << 16)) {
+ if (ID_AA64PFR0_EL1_FP(pfr)) {
pr_notice("Floating-point is not implemented\n");
return 0;
}
elf_hwcap |= HWCAP_FP;

- if (pfr & (0xf << 20))
+ if (ID_AA64PFR0_EL1_ADV_SIMD(pfr))
pr_notice("Advanced SIMD is not implemented\n");
else
elf_hwcap |= HWCAP_ASIMD;
--
2.5.0


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