[PATCH AUTOSEL 5.17 22/23] arm64: Enable repeat tlbi workaround on KRYO4XX gold CPUs
From: Sasha Levin <sashal@kernel.org>
Date: 2022-05-18 12:29:31
Also in:
linux-doc, lkml, stable
Subsystem:
arm64 port (aarch64 architecture), documentation, the rest · Maintainers:
Catalin Marinas, Will Deacon, Jonathan Corbet, Linus Torvalds
From: Shreyas K K <redacted> [ Upstream commit 51f559d66527e238f9a5f82027bff499784d4eac ] 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 <redacted> Reviewed-by: Sai Prakash Ranjan <redacted> Link: https://lore.kernel.org/r/20220512110134.12179-1-quic_shrekk@quicinc.com (local) Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- Documentation/arm64/silicon-errata.rst | 3 +++ arch/arm64/kernel/cpu_errata.c | 2 ++ 2 files changed, 5 insertions(+)
diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst
index ea281dd75517..29b136849d30 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 146fa2e76834..10c865e311a0 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 {},
--
2.35.1
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