[PATCH 0/2] arm64: Dealing with VHE-only CPUs

Marc Zyngier
2021-03-25T12:52:00Z

This short series is a rewrite of [1] after some reviewing from
Will. It simplifies the esoteric "stay at EL2" path, and the feature
override code where it actually belongs, allowing us to tell the user
that no, nVHE isn't a thing on these system.

This allows the infamous M1 to boot (tested on a M1 Mini).

Hector, feel free to pull these two patches as a preamble to the next
version of your series, though I'd expect this to go via the arm64
tree for obvious reasons.

[1] https://lore.kernel.org/r/20210304213902.83903-2-marcan@marcan.st

Marc Zyngier (2):
arm64: cpufeature: Allow early filtering of feature override
arm64: Cope with CPUs stuck in VHE mode

arch/arm64/kernel/cpufeature.c | 6 ++++++
arch/arm64/kernel/head.S | 33 +++++++++++++++++++++++++++---
arch/arm64/kernel/hyp-stub.S | 15 ++++++++++----
arch/arm64/kernel/idreg-override.c | 26 ++++++++++++++++++++++-
4 files changed, 72 insertions(+), 8 deletions(-)

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2.29.2