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Re: [PATCH v3 16/20] arm64: entry: Add fake CPU feature for unmapping the kernel at EL0




On Wed, Dec 06, 2017 at 12:35:35PM +0000, Will Deacon wrote:
> +static bool unmap_kernel_at_el0(const struct arm64_cpu_capabilities *entry,
> +				int __unused)
> +{
> +	/* Forced on command line? */
> +	if (__kpti_forced) {
> +		pr_info("kernel page table isolation forced %s by command line option\n",
> +			__kpti_forced > 0 ? "ON" : "OFF");
> +		return __kpti_forced > 0;
> +	}

I think we want this to be a pr_info_once() so that we don't print this
for late-onlined secondaries due to verify_local_cpu_features().

With that changed:

Reviewed-by: Mark Rutland <mark.rutland@xxxxxxx>

Thanks,
Mark.