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| author |   Alexandru Elisei <alexandru.elisei@arm.com> | 2021-08-24 16:45:23 +0100 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2021-08-26 11:35:09 +0100 |
| commit | 50cb99fa89aa2bec2cab2f9917010bbd7769bfa3 (patch) | |
| tree | 848a58f22bec7c6ca711370f8014531801ad4818 /Documentation/arm64 | |
| parent | arm64: mm: fix comment typo of pud_offset_phys() (diff) | |
| download | linux-dev-50cb99fa89aa2bec2cab2f9917010bbd7769bfa3.tar.xz linux-dev-50cb99fa89aa2bec2cab2f9917010bbd7769bfa3.zip | |
arm64: Do not trap PMSNEVFR_EL1
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.
Fixes: 31c00d2aeaa2 ("arm64: Disable fine grained traps on boot")
Cc: <stable@vger.kernel.org> # 5.13.x
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210824154523.906270-1-alexandru.elisei@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'Documentation/arm64')
0 files changed, 0 insertions, 0 deletions