skiboot v6.0.14 release notes

Signed-off-by: Stewart Smith <stewart@linux.ibm.com>

doc/release-notes/skiboot-6.0.14.rst

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+.. _skiboot-6.0.14:
+
+==============
+skiboot-6.0.14
+==============
+
+skiboot 6.0.14 was released on Tuesday November 27th, 2018. It replaces
+:ref:`skiboot-6.0.13` as the current stable release in the 6.0.x series.
+
+It is recommended that 6.0.14 be used instead of any previous 6.0.x version
+due to the bug fixes it contains.
+
+Bug fixes included in this release are:
+
+- libflash: Don't merge ECC-protected ranges
+
+  Libflash currently merges contiguous ECC-protected ranges, but doesn't
+  check that the ECC bytes at the end of the first and start of the second
+  range actually match sanely. More importantly, if blocklevel_read() is
+  called with a position at the start of a partition that is contained
+  somewhere within a region that has been merged it will update the
+  position assuming ECC wasn't being accounted for. This results in the
+  position being somewhere well after the actual start of the partition
+  which is incorrect.
+
+  For now, remove the code merging ranges. This means more ranges must be
+  held and checked however it prevents incorrectly reading ECC-correct
+  regions like below: ::
+
+    [  174.334119453,7] FLASH: CAPP partition has ECC
+    [  174.437349574,3] ECC: uncorrectable error: ffffffffffffffff ff
+    [  174.437426306,3] FLASH: failed to read the first 0x1000 from CAPP partition, rc 14
+    [  174.439919343,3] CAPP: Error loading ucode lid. index=201d1
+
+- ipmi: Reduce ipmi_queue_msg_sync() polling loop time to 10ms.
+
+  On a plain boot with hiomap, this reduces the time spent in OPAL
+  by ~170ms on p9dsu. This is due to hiomap (currently) using
+  synchronous IPMI messages.
+
+  It will also *significantly* reduce latency on runtime flash
+  operations with hiomap, as we'll spend typically 10-20ms in OPAL
+  rather than 100-200ms. It's not an ideal solution to that, but
+  it's a quick and obvious win for jitter.
+
+- opal-prd: Fix opal-prd crash
+
+  Crash log without this patch: ::
+
+      opal-prd[2864]: unhandled signal 11 at 0000000000029320 nip 00000 00102012830 lr 0000000102016890 code 1