Messages in this thread Patch in this message | | | From | Alexander Kuleshov <> | Subject | [PATCH 2/3] arm64/setup: Use ID_AA64ISAR0_EL1_.* macros | Date | Fri, 4 Sep 2015 00:12:52 +0600 |
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The 26d75e67c commit (arm64/cpufeature.h: Add macros for a cpu features testing) provides set of macros for the testing processor's crypto features. Let's use these macros instead of direct calculation.
Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com> --- arch/arm64/kernel/setup.c | 29 +++++++++-------------------- 1 file changed, 9 insertions(+), 20 deletions(-)
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index 926ae8d..a3faf4f 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -250,33 +250,22 @@ static void __init setup_processor(void) /* * ID_AA64ISAR0_EL1 contains 4-bit wide signed feature blocks. - * The blocks we test below represent incremental functionality - * for non-negative values. Negative values are reserved. */ features = read_cpuid(ID_AA64ISAR0_EL1); - block = (features >> 4) & 0xf; - if (!(block & 0x8)) { - switch (block) { - default: - case 2: - elf_hwcap |= HWCAP_PMULL; - case 1: - elf_hwcap |= HWCAP_AES; - case 0: - break; - } - } - block = (features >> 8) & 0xf; - if (block && !(block & 0x8)) + if (ID_AA64ISAR0_EL1_AES(features)) + elf_hwcap |= HWCAP_AES; + + if (ID_AA64ISAR0_EL1_PMULL(features)) + elf_hwcap |= HWCAP_PMULL; + + if (ID_AA64ISAR0_EL1_SHA1(features)) elf_hwcap |= HWCAP_SHA1; - block = (features >> 12) & 0xf; - if (block && !(block & 0x8)) + if (ID_AA64ISAR0_EL1_SHA2(features)) elf_hwcap |= HWCAP_SHA2; - block = (features >> 16) & 0xf; - if (block && !(block & 0x8)) + if (ID_AA64ISAR0_EL1_CRC32(features)) elf_hwcap |= HWCAP_CRC32; #ifdef CONFIG_COMPAT -- 2.5.0
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