On Tue, Aug 24, 2021 at 04:45:23PM +0100, Alexandru Elisei wrote:

> Commit 31c00d2aeaa2 ("arm64: Disable fine grained traps on boot") zeroed
> the fine grained trap registers to prevent unwanted register traps from
> occuring. However, for the PMSNEVFR_EL1 register, the corresponding
> HDFG{R,W}TR_EL2.nPMSNEVFR_EL1 fields must be 1 to disable trapping. Set
> both fields to 1 if FEAT_SPEv1p2 is detected to disable read and write
> traps.

Reviewed-by: Mark Brown <broonie@kernel.org>