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

Mark Rutland
2017-12-06T14:11:44Z

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@arm.com>

Thanks,
Mark.