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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Oct 28, 2020 at 11:12:04AM +0000, Catalin Marinas wrote: > On Tue, Oct 27, 2020 at 09:51:14PM +0000, Will Deacon wrote: > > +static bool has_32bit_el0(const struct arm64_cpu_capabilities *entry, int scope) > > +{ > > + return has_cpuid_feature(entry, scope) || __allow_mismatched_32bit_el0; > > +} > > + > > static bool has_useable_gicv3_cpuif(const struct arm64_cpu_capabilities *entry, int scope) > > { > > bool has_sre; > > @@ -1803,7 +1851,7 @@ static const struct arm64_cpu_capabilities arm64_features[] = { > > .desc = "32-bit EL0 Support", > > .capability = ARM64_HAS_32BIT_EL0, > > .type = ARM64_CPUCAP_SYSTEM_FEATURE, > > - .matches = has_cpuid_feature, > > + .matches = has_32bit_el0, > > Ah, so this one reports 32-bit EL0 support even if no CPU actually > supports 32-bit (passing the command line option on TX2 would come up > with 32-bit EL0 in dmesg). I'd rather hide the .desc above and print the > information elsewhere when have at least one CPU supporting this. Yeah, the problem is if a CPU with 32-bit EL0 support was late-onlined, then we would have 32-bit support, so I think this is an oddity that you get when the command line is passed. That said, I could nobble .desc and print it from the .matches function, with a slightly different message when the command line is passed. Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel