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Scenario:
Sent a buffer reference and its size from EL1 secure world as a SIP SMC, such that EL3 write on that buffer and ERET to EL1.
Query:
1. Does cache flush is required at any exception level to correct read the buffer at EL1 after ERET ?
2. If Yes, Why?
3. If no, then where to fetch related information that explains in detail why it is not required.