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CONFIG_ARM_ERRATA_821420: ARM errata: A12: sequence of VMOV to core registers might lead to a dead lock

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The Linux kernel configuration item CONFIG_ARM_ERRATA_821420:

Help text

This option enables the workaround for the 821420 Cortex-A12 (all revs) erratum. In very rare timing conditions, a sequence of VMOV to Core registers instructions, for which the second one is in the shadow of a branch or abort, can lead to a deadlock when the VMOV instructions are issued out-of-order.



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