KVM: arm64: Snapshot all non-zero RES0/RES1 sysreg fields for later checking

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As KVM now strongly relies on accurately handling the RES0/RES1 bits
on a number of paths, add a compile-time checker that will blow in
the face of the innocent bystander, should they try to sneak in an
update that changes any of these RES0/RES1 fields.

It is expected that such an update will come with the relevant
KVM update if needed.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240214131827.2856277-26-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

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Marc Zyngier 2024-02-14 13:18:26 +00:00 • committed by Oliver Upton

parent 84de212d73

commit b80b701d5a

2 changed files with 124 additions and 0 deletions

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121

arch/arm64/kvm/check-res-bits.h

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3

arch/arm64/kvm/sys_regs.c

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