[Skiboot] [PATCH] Document changes in OPAL API for POWER9

Stewart Smith stewart at linux.vnet.ibm.com
Mon Jun 20 17:04:38 AEST 2016

Well, the beginning of a TODO list at least

Signed-off-by: Stewart Smith <stewart at linux.vnet.ibm.com>
 doc/opal-api/power9-changes.txt | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 doc/opal-api/power9-changes.txt

diff --git a/doc/opal-api/power9-changes.txt b/doc/opal-api/power9-changes.txt
new file mode 100644
index 0000000..0552bb3
--- /dev/null
+++ b/doc/opal-api/power9-changes.txt
@@ -0,0 +1,19 @@
+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.
+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

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