CONFIG_ARM64_ERRATUM_1530923: Cortex-A55: 1530923: 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 has multiple definitions:

Cortex-A55: 1530923: Speculative AT instruction using out-of-context translation regime could cause subsequent request to generate an incorrect translation found in arch/arm64/Kconfig

The configuration item CONFIG_ARM64_ERRATUM_1530923:

• prompt: Cortex-A55: 1530923: Speculative AT instruction using out-of-context translation regime could cause subsequent request to generate an incorrect translation
• type: bool
• depends on: (none)
• defined in arch/arm64/Kconfig
• found in Linux kernels: 5.8–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

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.

Cortex-A55: Speculative AT instruction using out-of-context translation regime could cause subsequent request to generate an incorrect translation found in arch/arm64/Kconfig

The configuration item CONFIG_ARM64_ERRATUM_1530923:

• prompt: Cortex-A55: Speculative AT instruction using out-of-context translation regime could cause subsequent request to generate an incorrect translation
• type: bool
• depends on: (none)
• defined in arch/arm64/Kconfig
• found in Linux kernels: 5.6–5.7

Help text

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.

Hardware

LKDDb

Raw data from LKDDb:

• (none)

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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