KVM: arm64: Add reg_feat_map_desc to describe full register dependency

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struct reg_bits_to_feat_map is great to describe bit-to-feature
dependency, but not so much to describe register-to-feature
dependency. Yet both need to exist.

Add a new reg_feat_map_desc structure to describe this.

Extra complexity is added by the need to source the RES0 bits from
the runtime-computed FGT masks, for which we need an extra flag
and extra complexity. Oh well.

Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>

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Marc Zyngier 2025-09-18 16:13:54 +01:00

parent c3b3bbd160

commit 559442afea

1 changed files with 72 additions and 9 deletions

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arch/arm64/kvm/config.c

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