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Commit 4bcf61fa authored by Mark Rutland's avatar Mark Rutland Committed by Greg Kroah-Hartman
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arm64: cpu_errata: Allow an erratum to be match for all revisions of a core 




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

commit 06f1494f837da8997d670a1ba87add7963b08922 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: default avatarThomas Gleixner <tglx@linutronix.de>
Acked-by: default avatarMark Rutland <mark.rutland@arm.com>
Acked-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: default avatarSuzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com> [v4.9 backport]
Tested-by: default avatarGreg Hackmann <ghackmann@google.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 04b4cc6d

arch/arm64/kernel/cpu_errata.c

+7 −0
Original line number Diff line number Diff line
@@ -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) || \