Update ARM and AARCH64 AInvs for explicit FPU changes #850
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lsf37
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lsf37
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lsf37
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Signed-off-by: Corey Lewis <corey.lewis@proofcraft.systems>
No need to review this commit Signed-off-by: Corey Lewis <corey.lewis@proofcraft.systems>
Signed-off-by: Corey Lewis <corey.lewis@proofcraft.systems>
This is used to track within the tcb whether it is the current fpu owner, so that we are able to determine whether a tcb is live without needing to look at global state. Signed-off-by: Corey Lewis <corey.lewis@proofcraft.systems>
For architectures with FPU enabled, this shows that the tcb_cur_fpu field in each tcb is consistent with the global current_fpu_owner. As a consequence of this, it also shows that if the global current_fpu_owner is set to something then there is a tcb there. Signed-off-by: Corey Lewis <corey.lewis@proofcraft.systems>
Signed-off-by: Corey Lewis <corey.lewis@proofcraft.systems>
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…r_fpu field Signed-off-by: Corey Lewis <corey.lewis@proofcraft.systems>
This branch has been rebased over master now #852 has been merged. |
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This updates the AInvs proofs for ARM and AARCH64 following the specification changes made in #819 that made FPU state more explicit and changed the kernel to use semi-lazy FPU switching. It additionally proves a new invariant about the FPU that we expect to be necessary for later stages of the functional correctness proofs and also updates Access for ARM.