Linux Safety Architecture methodology #9
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reiterative
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May 25, 2022
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- Based on methodology proposed in Safety Architecture WG minutes WW21
* From Safety Architecture WG minutes WW21 Signed-off-by: Paul Albertella <[email protected]>
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Jun 21, 2022
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| # Kernel Safety Architecture Methodology | |||
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from Gab: I think we need to align this methodology with the pull request: #3
| * Functionalities allocated to each functional block (NOTE: only functionalities that are meaningful for fulfilling the allocated requirement) | ||
| * For each of the identified functionalities the role of the interfaces shall be described (under which conditions they are invoked) | ||
| * Safety Analysis: Do an STPA analysis and define derived safety requirements for each of the functional blocks as in 3) | ||
| * Iterate: Evaluate functional blocks complexity vs allocated safety requirements and eventually iterate back in 1) or stop here if not needed (complexity is acceptable) |
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From Gab: the stop criteria should be rephrased as "the are comprehensive and complete architectural mitigation measure to satisfy the allocated safety requirement or the complexity is acceptable"
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| * Safety Requirement Definition: an initial safety requirement must be allocated to the Kernel as a whole from the safety concept of domain specific WGs. | ||
| * Scope Identification: given a safety requirement, the code functionally supporting such requirement must be comprehensively identified | ||
| * Initial partitioning into functional blocks: one or more functional blocks in the scope of the code above must be identified and for each of these blocks we should describe: |
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from Gab: is the name "functional block" correct or it should be replaced by "controllers" (to meet the STPA terminology)?
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