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arm64: cpu_errata: Allow an erratum to be match for all revisions of a core

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From: Marc Zyngier <marc.zyngier@arm.com>

commit 06f1494f83 upstream.

Some minor erratum may not be fixed in further revisions of a core,
leading to a situation where the workaround needs to be updated each
time an updated core is released.

Introduce a MIDR_ALL_VERSIONS match helper that will work for all
versions of that MIDR, once and for all.

Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com> [v4.9 backport]
Tested-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mark Rutland
2018-04-12 12:11:20 +01:00
committed by Greg Kroah-Hartman
parent 04b4cc6dab
commit 4bcf61fa86
1 changed files with 7 additions and 0 deletions
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7
arch/arm64/kernel/cpu_errata.c
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@@ -127,6 +127,13 @@ static void install_bp_hardening_cb(const struct arm64_cpu_capabilities *entry,
.midr_range_min = min, \
.midr_range_max = max
#define MIDR_ALL_VERSIONS(model) \
.def_scope = SCOPE_LOCAL_CPU, \
.matches = is_affected_midr_range, \
.midr_model = model, \
.midr_range_min = 0, \
.midr_range_max = (MIDR_VARIANT_MASK | MIDR_REVISION_MASK)
const struct arm64_cpu_capabilities arm64_errata[] = {
#if defined(CONFIG_ARM64_ERRATUM_826319) || \
defined(CONFIG_ARM64_ERRATUM_827319) || \