From: Alexander Kuleshov <kuleshovmail@gmail.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Alexander Kuleshov <kuleshovmail@gmail.com>
Subject: [PATCH 3/3] arm64/fpsimd: Use ID_AA64PFR0_EL1_.* macros
Date: Fri, 4 Sep 2015 00:12:59 +0600 [thread overview]
Message-ID: <1441303979-9535-1-git-send-email-kuleshovmail@gmail.com> (raw)
In-Reply-To: <1441303911-9421-1-git-send-email-kuleshovmail@gmail.com>
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
next prev parent reply other threads:[~2015-09-03 18:13 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-03 18:11 [PATCH 1/3] arm64/cpufeature.h: Add macros for a cpu features testing Alexander Kuleshov
2015-09-03 18:12 ` [PATCH 2/3] arm64/setup: Use ID_AA64ISAR0_EL1_.* macros Alexander Kuleshov
2015-09-04 11:26 ` Catalin Marinas
2016-11-07 16:30 ` Suzuki K Poulose
2015-09-03 18:12 ` Alexander Kuleshov [this message]
2016-11-07 16:31 ` [PATCH 3/3] arm64/fpsimd: Use ID_AA64PFR0_EL1_.* macros Suzuki K Poulose
2015-09-04 11:25 ` [PATCH 1/3] arm64/cpufeature.h: Add macros for a cpu features testing Catalin Marinas
2015-09-04 12:00 ` Suzuki K. Poulose
2015-09-04 12:19 ` Alexander Kuleshov
2015-09-16 14:48 ` Suzuki K. Poulose
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