On Thu, Oct 03, 2019 at 12:12:08PM +0100, Julien Grall wrote:
> The HWCAP framework will detect a new capability based on the sanitized
> version of the ID registers.
>
> Sanitization is based on a whitelist, so any field not described will end
> up to be zeroed.
>
> At the moment, ID_AA64ISAR1_EL1.FRINTTS is not described in
> ftr_id_aa64isar1. This means the field will be zeroed and therefore the
> userspace will not be able to see the HWCAP even if the hardware
> supports the feature.
>
> This can be fixed by describing the field in ftr_id_aa64isar1.
>
> Fixes: ca9503fc9e98 ("arm64: Expose FRINT capabilities to userspace")
> Signed-off-by: Julien Grall <julien.gr...@arm.com>
> Cc: mark.br...@arm.com
> ---
> arch/arm64/kernel/cpufeature.c | 1 +
> 1 file changed, 1 insertion(+)
D'oh, we should've caught this in testing. Queued as a fix.
Will
