Re: [PATCH v2] arm64: Do not trap PMSNEVFR_EL1
From: Mark Brown <broonie@kernel.org>
Date: 2021-08-24 15:55:51
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kvmarm
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>