@@ -61,7 +61,8 @@
#define ARM64_HAS_AMU_EXTN 51
#define ARM64_HAS_ADDRESS_AUTH 52
#define ARM64_HAS_GENERIC_AUTH 53
+#define ARM64_HAS_TLBI_RANGE 54
-#define ARM64_NCAPS 54
+#define ARM64_NCAPS 55
#endif /* __ASM_CPUCAPS_H */
@@ -594,6 +594,7 @@
/* id_aa64isar0 */
#define ID_AA64ISAR0_RNDR_SHIFT 60
+#define ID_AA64ISAR0_TLBI_RANGE_SHIFT 56
#define ID_AA64ISAR0_TS_SHIFT 52
#define ID_AA64ISAR0_FHM_SHIFT 48
#define ID_AA64ISAR0_DP_SHIFT 44
@@ -607,6 +608,9 @@
#define ID_AA64ISAR0_SHA1_SHIFT 8
#define ID_AA64ISAR0_AES_SHIFT 4
+#define ID_AA64ISAR0_TLBI_RANGE_NI 0x0
+#define ID_AA64ISAR0_TLBI_RANGE 0x2
+
/* id_aa64isar1 */
#define ID_AA64ISAR1_I8MM_SHIFT 52
#define ID_AA64ISAR1_DGH_SHIFT 48
@@ -124,6 +124,7 @@ static bool __system_matches_cap(unsigned int n);
*/
static const struct arm64_ftr_bits ftr_id_aa64isar0[] = {
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ISAR0_RNDR_SHIFT, 4, 0),
+ ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ISAR0_TLBI_RANGE_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ISAR0_TS_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ISAR0_FHM_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ISAR0_DP_SHIFT, 4, 0),
@@ -1779,6 +1780,16 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
.min_field_value = 1,
},
#endif
+ {
+ .desc = "TLB range maintenance instruction",
+ .capability = ARM64_HAS_TLBI_RANGE,
+ .type = ARM64_CPUCAP_SYSTEM_FEATURE,
+ .matches = has_cpuid_feature,
+ .sys_reg = SYS_ID_AA64ISAR0_EL1,
+ .field_pos = ID_AA64ISAR0_TLBI_RANGE_SHIFT,
+ .sign = FTR_UNSIGNED,
+ .min_field_value = ID_AA64ISAR0_TLBI_RANGE,
+ },
{},
};
ARMv8.4-TLBI provides TLBI invalidation instruction that apply to a range of input addresses. This patch detect this feature. Signed-off-by: Zhenyu Ye <yezhenyu2@huawei.com> --- arch/arm64/include/asm/cpucaps.h | 3 ++- arch/arm64/include/asm/sysreg.h | 4 ++++ arch/arm64/kernel/cpufeature.c | 11 +++++++++++ 3 files changed, 17 insertions(+), 1 deletion(-)