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Document changes in OPAL API for POWER9

Message ID 1466406278-22639-1-git-send-email-stewart@linux.vnet.ibm.com
State Accepted
Headers show

Commit Message

Stewart Smith June 20, 2016, 7:04 a.m. UTC 
Well, the beginning of a TODO list at least

Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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 doc/opal-api/power9-changes.txt | 19 +++++++++++++++++++
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 create mode 100644 doc/opal-api/power9-changes.txt
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diff --git a/doc/opal-api/power9-changes.txt b/doc/opal-api/power9-changes.txt
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+POWER9 Changes to OPAL API
+--------------------------
+
+This document is a summary of POWER9 changes to the OPAL API over what it
+was for POWER7 and POWER8. As the POWER series of processors (at least up
+to POWER9) require changes in the hypervisor to work on a new processor
+generation, this gives us an opportunity with POWER9 to clean up several
+parts of the OPAL API.
+
+Eventually, when the kernel drops support for POWER8 and before, we can then
+remove the associated kernel code too.
+
+
+TODO
+----
+Things we still have to do for POWER9:
+- remove opal-v2 from compatible string.
+- PCI to use async API rather than returning delays
+- deprecate/remove v1 APIs where there's a V2