Messages in this thread Patch in this message | | | Date | Mon, 20 Mar 2017 14:56:14 +0000 | From | Mark Rutland <> | Subject | Re: [PATCH 13/17] arm64: cpu_errata: Allow an erratum to be match for all revisions of a core |
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On Mon, Mar 06, 2017 at 11:26:18AM +0000, Marc Zyngier wrote: > 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.
That is somewhat unfortunate. :(
> Introduce a MIDR_ALL_VERSIONS match helper that will work for all > versions of that MIDR, once and for all. > > Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This looks sane to me. FWIW:
Acked-by: Mark Rutland <mark.rutland@arm.com>
Suzuki, any thoughts?
Mark.
> --- > 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 f6cc67e7626e..2be1d1c05303 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) || \ > -- > 2.11.0 >
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