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-rw-r--r--arch/arm64/kernel/setup.c35
1 files changed, 15 insertions, 20 deletions
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index b2f9895ecf7b..be65ecc89e82 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -223,7 +223,8 @@ void __init up_late_init(void)
static void __init setup_processor(void)
{
- u64 features, block;
+ u64 features;
+ s64 block;
u32 cwg;
int cls;
@@ -253,8 +254,8 @@ static void __init setup_processor(void)
* for non-negative values. Negative values are reserved.
*/
features = read_cpuid(ID_AA64ISAR0_EL1);
- block = (features >> 4) & 0xf;
- if (!(block & 0x8)) {
+ block = cpuid_feature_extract_field(features, 4);
+ if (block > 0) {
switch (block) {
default:
case 2:
@@ -266,20 +267,17 @@ static void __init setup_processor(void)
}
}
- block = (features >> 8) & 0xf;
- if (block && !(block & 0x8))
+ if (cpuid_feature_extract_field(features, 8) > 0)
elf_hwcap |= HWCAP_SHA1;
- block = (features >> 12) & 0xf;
- if (block && !(block & 0x8))
+ if (cpuid_feature_extract_field(features, 12) > 0)
elf_hwcap |= HWCAP_SHA2;
- block = (features >> 16) & 0xf;
- if (block && !(block & 0x8))
+ if (cpuid_feature_extract_field(features, 16) > 0)
elf_hwcap |= HWCAP_CRC32;
- block = (features >> 20) & 0xf;
- if (!(block & 0x8)) {
+ block = cpuid_feature_extract_field(features, 20);
+ if (block > 0) {
switch (block) {
default:
case 2:
@@ -294,11 +292,11 @@ static void __init setup_processor(void)
#ifdef CONFIG_COMPAT
/*
* ID_ISAR5_EL1 carries similar information as above, but pertaining to
- * the Aarch32 32-bit execution state.
+ * the AArch32 32-bit execution state.
*/
features = read_cpuid(ID_ISAR5_EL1);
- block = (features >> 4) & 0xf;
- if (!(block & 0x8)) {
+ block = cpuid_feature_extract_field(features, 4);
+ if (block > 0) {
switch (block) {
default:
case 2:
@@ -310,16 +308,13 @@ static void __init setup_processor(void)
}
}
- block = (features >> 8) & 0xf;
- if (block && !(block & 0x8))
+ if (cpuid_feature_extract_field(features, 8) > 0)
compat_elf_hwcap2 |= COMPAT_HWCAP2_SHA1;
- block = (features >> 12) & 0xf;
- if (block && !(block & 0x8))
+ if (cpuid_feature_extract_field(features, 12) > 0)
compat_elf_hwcap2 |= COMPAT_HWCAP2_SHA2;
- block = (features >> 16) & 0xf;
- if (block && !(block & 0x8))
+ if (cpuid_feature_extract_field(features, 16) > 0)
compat_elf_hwcap2 |= COMPAT_HWCAP2_CRC32;
#endif
}
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