skiboot 5.9-rc3 release notes

Signed-off-by: Stewart Smith <[email protected]>

doc/release-notes/skiboot-5.9-rc3.rst

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+.. _skiboot-5.9-rc3:
+
+skiboot-5.9-rc3
+===============
+
+skiboot v5.9-rc3 was released on Wednesday October 18th 2017. It is the third
+release candidate of skiboot 5.9, which will become the new stable release
+of skiboot following the 5.8 release, first released August 31st 2017.
+
+skiboot v5.9-rc3 contains all bug fixes as of :ref:`skiboot-5.4.8`
+and :ref:`skiboot-5.1.21` (the currently maintained stable releases). We
+do not currently expect to do any 5.8.x stable releases.
+
+For how the skiboot stable releases work, see :ref:`stable-rules` for details.
+
+The current plan is to cut the final 5.9 by October 20th, with skiboot 5.9
+being for all POWER8 and POWER9 platforms in op-build v1.20 (Due October 18th).
+This release will be targetted to early POWER9 systems.
+
+Over :ref:`skiboot-5.9-rc2`, we have the following changes:
+
+
+- Improvements to vpd device tree entries
+
+  Previously we would miss some properties
+- Revert "npu2: Add vendor cap for IRQ testing"
+
+  This reverts commit 9817c9e29b6fe00daa3a0e4420e69a97c90eb373 which seems to
+  break setting the PCI dev flag and the link number in the PCIe vendor
+  specific config space. This leads to the device driver attempting to
+  re-init the DL when it shouldn't which can cause HMI's.
+
+- hw/imc: Fix IMC Catalog load for DD2.X processors
+- cpu: Add OPAL_REINIT_CPUS_TM_SUSPEND_DISABLED
+
+  Add a new CPU reinit flag, "TM Suspend Disabled", which requests that
+  CPUs be configured so that TM (Transactional Memory) suspend mode is
+  disabled.
+
+  Currently this always fails, because skiboot has no way to query the
+  state. A future hostboot change will add a mechanism for skiboot to
+  determine the status and return an appropriate error code.