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CONFIG_ARM64_ERRATUM_1530923: Cortex-A55: Speculative AT instruction using out-of-context translation regime could cause subsequent request to generate an incorrect translation

General informations

The Linux kernel configuration item CONFIG_ARM64_ERRATUM_1530923:

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This option adds a workaround for ARM Cortex-A55 erratum 1530923.

Affected Cortex-A55 cores (r0p0, r0p1, r1p0, r2p0) could end-up with corrupted TLBs by speculating an AT instruction during a guest context switch.

If unsure, say Y.



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