arm64: apply ARM64_ERRATUM_843419 workaround for Brahma-B53 core
The Broadcom Brahma-B53 core is susceptible to the issue described by ARM64_ERRATUM_843419 so this commit enables the workaround to be applied when executing on that core. Since there are now multiple entries to match, we must convert the existing ARM64_ERRATUM_843419 into an erratum list and use cpucap_multi_entry_cap_matches to match our entries. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Will Deacon <will@kernel.org>
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@ -93,6 +93,8 @@ stable kernels.
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+----------------+-----------------+-----------------+-----------------------------+
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| Broadcom | Brahma-B53 | N/A | ARM64_ERRATUM_845719 |
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+----------------+-----------------+-----------------+-----------------------------+
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| Broadcom | Brahma-B53 | N/A | ARM64_ERRATUM_843419 |
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+----------------+-----------------+-----------------+-----------------------------+
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+----------------+-----------------+-----------------+-----------------------------+
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| Cavium | ThunderX ITS | #22375,24313 | CAVIUM_ERRATUM_22375 |
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+----------------+-----------------+-----------------+-----------------------------+
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@ -755,6 +755,23 @@ static const struct midr_range erratum_845719_list[] = {
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};
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#endif
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#ifdef CONFIG_ARM64_ERRATUM_843419
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static const struct arm64_cpu_capabilities erratum_843419_list[] = {
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{
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/* Cortex-A53 r0p[01234] */
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.matches = is_affected_midr_range,
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ERRATA_MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 4),
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MIDR_FIXED(0x4, BIT(8)),
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},
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{
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/* Brahma-B53 r0p[0] */
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.matches = is_affected_midr_range,
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ERRATA_MIDR_REV(MIDR_BRAHMA_B53, 0, 0),
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},
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{},
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};
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#endif
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const struct arm64_cpu_capabilities arm64_errata[] = {
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#ifdef CONFIG_ARM64_WORKAROUND_CLEAN_CACHE
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{
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@ -786,11 +803,11 @@ const struct arm64_cpu_capabilities arm64_errata[] = {
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#endif
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#ifdef CONFIG_ARM64_ERRATUM_843419
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{
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/* Cortex-A53 r0p[01234] */
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.desc = "ARM erratum 843419",
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.capability = ARM64_WORKAROUND_843419,
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ERRATA_MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 4),
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MIDR_FIXED(0x4, BIT(8)),
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.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
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.matches = cpucap_multi_entry_cap_matches,
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.match_list = erratum_843419_list,
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},
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#endif
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#ifdef CONFIG_ARM64_ERRATUM_845719
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