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    Subject[PATCH 19/45] arm64: cpu_errata: Allow an erratum to be match for all revisions of a core
    Date
    From: Marc Zyngier <marc.zyngier@arm.com>

    commit 06f1494f837 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: Alex Shi <alex.shi@linaro.org>
    ---
    arch/arm64/kernel/cpu_errata.c | 7 +++++++
    1 file changed, 7 insertions(+)

    diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
    index b75e917..c66a673c 100644
    --- a/arch/arm64/kernel/cpu_errata.c
    +++ b/arch/arm64/kernel/cpu_errata.c
    @@ -53,6 +53,13 @@ static int cpu_enable_trap_ctr_access(void *__unused)
    .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) || \
    --
    2.7.4
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