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authorShreyas K K <quic_shrekk@quicinc.com>2022-05-12 16:31:34 +0530
committerWill Deacon <will@kernel.org>2022-05-12 13:15:38 +0100
commit51f559d66527e238f9a5f82027bff499784d4eac (patch)
treecd48f8d0a0c01915568c852689b20707f02aaea9
parent2de7689c7caa55949da5a56be02ec41a86ac1725 (diff)
arm64: Enable repeat tlbi workaround on KRYO4XX gold CPUs
Add KRYO4XX gold/big cores to the list of CPUs that need the repeat TLBI workaround. Apply this to the affected KRYO4XX cores (rcpe to rfpe). The variant and revision bits are implementation defined and are different from the their Cortex CPU counterparts on which they are based on, i.e., (r0p0 to r3p0) is equivalent to (rcpe to rfpe). Signed-off-by: Shreyas K K <quic_shrekk@quicinc.com> Reviewed-by: Sai Prakash Ranjan <quic_saipraka@quicinc.com> Link: https://lore.kernel.org/r/20220512110134.12179-1-quic_shrekk@quicinc.com Signed-off-by: Will Deacon <will@kernel.org>
-rw-r--r--Documentation/arm64/silicon-errata.rst3
-rw-r--r--arch/arm64/kernel/cpu_errata.c2
2 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst
index 466cb9e89047..d27db84d585e 100644
--- a/Documentation/arm64/silicon-errata.rst
+++ b/Documentation/arm64/silicon-errata.rst
@@ -189,6 +189,9 @@ stable kernels.
+----------------+-----------------+-----------------+-----------------------------+
| Qualcomm Tech. | Kryo4xx Silver | N/A | ARM64_ERRATUM_1024718 |
+----------------+-----------------+-----------------+-----------------------------+
+| Qualcomm Tech. | Kryo4xx Gold | N/A | ARM64_ERRATUM_1286807 |
++----------------+-----------------+-----------------+-----------------------------+
+
+----------------+-----------------+-----------------+-----------------------------+
| Fujitsu | A64FX | E#010001 | FUJITSU_ERRATUM_010001 |
+----------------+-----------------+-----------------+-----------------------------+
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index 4c9b5b4b7a0b..a0f3d0aaa3c5 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -208,6 +208,8 @@ static const struct arm64_cpu_capabilities arm64_repeat_tlbi_list[] = {
#ifdef CONFIG_ARM64_ERRATUM_1286807
{
ERRATA_MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 0),
+ /* Kryo4xx Gold (rcpe to rfpe) => (r0p0 to r3p0) */
+ ERRATA_MIDR_RANGE(MIDR_QCOM_KRYO_4XX_GOLD, 0xc, 0xe, 0xf, 0xe),
},
#endif
{},