# \[PATCH v3 2/2\] arm64: Allow booting of late CPUs affected by erratum 1418040

- From: Marc Zyngier \<maz@kernel.org\>
- Date: 2020-07-31 17:40:26 
- List: linux-arm-kernel
- Page: https://ratatoskr.run/linux-arm-kernel/2020/07/8797320
- Thread: https://ratatoskr.run/linux-arm-kernel/2020/07/8797321/t.md

```text
As we can now switch from a system that isn't affected by 1418040
to a system that globally is affected, let's allow affected CPUs
to come in at a later time.

Reviewed-by: Stephen Boyd <redacted>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Acked-by: Will Deacon <will@kernel.org>
Tested-by: Sai Prakash Ranjan <redacted>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/kernel/cpu_errata.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index 79728bfb5351..2c0b82db825b 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -910,6 +910,8 @@ const struct arm64_cpu_capabilities arm64_errata[] = {
 		.desc = "ARM erratum 1418040",
 		.capability = ARM64_WORKAROUND_1418040,
 		ERRATA_MIDR_RANGE_LIST(erratum_1418040_list),
+		.type = (ARM64_CPUCAP_SCOPE_LOCAL_CPU |
+			 ARM64_CPUCAP_PERMITTED_FOR_LATE_CPU),
 	},
 #endif
 #ifdef CONFIG_ARM64_WORKAROUND_SPECULATIVE_AT
-- 
2.27.0


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```
