Add skiboot-5.1.0 release notesskiboot-5.1.0

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

1 files changed, 260 insertions, 0 deletions

diff --git a/doc/release-notes/skiboot-5.1.0.txt b/doc/release-notes/skiboot-5.1.0.txt
new file mode 100644
index 0000000..378aad7
--- /dev/null
+++ b/doc/release-notes/skiboot-5.1.0.txt
@@ -0,0 +1,260 @@
+skiboot-5.1.0
+-------------
+
+skiboot-5.1.0 was released on August 17th, 2015.
+
+skiboot-5.1.0 is the first stable release of 5.1.0 following two beta releases.
+This new stable release replaces skiboot-5.0 as the current stable skiboot
+release (5.0 was released April 14th 2015).
+
+Skiboot 5.1.0 contains all fixes from skiboot-5.0 stable branch up to
+skiboot-5.0.5 and everything from 5.1.0-beta1 and 5.1.0-beta2.
+
+Over skiboot-5.1.0-beta2, we have the following changes:
+- opal_prd now supports multiple socket systems
+- fix compiler warnings in gard and libflash
+
+Below are the changes introduced in previous skiboot-5.1.0 releases over
+the previous stable release, skiboot-5.0:
+
+New features:
+- Centaur i2c support
+- Add Naples chip (CPU, PHB, LPC serial interrupts) support
+- Added qemu platform
+- improvements to FSI error handling
+- improvements in chip TOD failover (some only on FSP systems)
+- Set Relative Priority Register (RPR) to recommended value
+  - this affects thread priority in SMT modes
+- greatly reduce memory consumption by CPU stacks for non-present CPUs
+  - Previously we would reserve enough memory for max PIR for each CPU
+    type.
+  - This fix frees up 77MB of RAM on a typical P8 system.
+- increased OPAL API documentation
+- Asynchronous preloading of resources from FSP/flash
+  - improves boot time on some systems
+- Basic Garrison platform support
+- Add Mambo platform (P8 Functional Simulator, systemsim)
+  - includes fake NVRAM, RTC
+- Support building with GCOV, increasing memory for skiboot binary to 2MB
+  - includes boot code coverage testing
+- Increased skiboot HEAP size.
+  - We are not aware of any system where you would run out, but on large
+    systems it was getting closer than we liked.
+- add boot_tests.sh for helping automate boot testing on FSP and BMC machines
+- Versioning of pflash and gard utilities to help Linux (or other OS)
+  distributions with packaging.
+- OCC throttle status messages to host
+- CAPP timebase sync ("ibm,capp-timebase-sync" in DT to indicate CAPP timebase
+  was synced by OPAL)
+- opal-api: Add OPAL call to handle abnormal reboots.
+     OPAL_CEC_REBOOT2
+     Currently it will support two reboot types (0). normal reboot, that
+     will behave similar to that of opal_cec_reboot() call, and
+     (1). platform error reboot.
+
+     Long term, this is designed to replace OPAL_CEC_REBOOT.
+
+New features for FSP based machines:
+- in-band IPMI support
+- ethernet adaptor location codes
+- add DIMM frequency information to device tree
+- improvements in FSP error log code paths
+- fix some boot time memory leaks
+  - harmless to end user
+
+New features for AMI BMC based machines:
+- PCIe power workaround for K80
+- Added support for Macronix 128Mbit flash chips
+- Initial PRD support for Firestone platform
+- improved reliability when BMC reboots
+
+The following bugs have been fixed:
+- Increase PHB3 timeout for electrical links coming up to 2 seconds.
+  - fixes issues with some Mellanox cards
+- Hang in opal_reinit_cpus() that could prevent kdump from functioning
+- PHB3: fix crash in phb3_init
+- PHB3: fix crash with fenced PHB in phb3_init_hw()
+- Fix bugs in hw/bt.c (interface for IPMI on BMC machines) that could possibly
+  lead to a crash (dereferencing invalid address, deadlock)
+- ipmi/sel: fix use-after-free
+- Bug fixes in EEH handling
+  - opal_pci_next_error() cleared OPAL_EVENT_PCI_ERROR unconditionally, possibly
+    leading to missed errors.
+- external/opal-prd: Only map each PRD range once
+  - could eventually lead to failing to map PRD ranges
+- On skiboot crash, don't try to print symbol when we didn't find one
+  - makes backtrace prettier
+- On skiboot crash, dump hssr0 and hsrr1 registers correctly.
+- Better support old and biarch compilers
+  - test "new" compiler flags before using them
+  - Specify -mabi=elfv1 if supported (which means it's needed)
+- fix boot-coverage-report makefile target
+- ipmi: Fix the opal_ipmi_recv() call to handle the error path
+  - Could make kernel a sad panda when in continues with other IPMI commands
+- IPMI: truncate SELs at 2kb
+  - it's the limit of the astbmc. We think.
+- IPMI/SEL/PEL:
+  - As per PEL spec, we should log events with severity >= 0x22 and "service
+    action flag" is "on". But in our case, all logs OPAL originagted logs
+    are makred as report externally.
+    We now only report logs with severity >= 0x22
+- IPMI: fixes to eSEL logging
+- hw/phb3: Change reserved PE to 255
+  -  Currently, we have reserved PE#0 to which all RIDs are mapped prior
+     to PE assignment request from kernel. The last M64 BAR is configured
+     to have shared mode. So we have to cut off the first M64 segment,
+     which corresponds to reserved PE#0 in kernel. If the first BAR
+     (for example PF's IOV BAR) requires huge alignment in kernel, we
+     have to waste huge M64 space to accomodate the alignment. If we
+     have reserved PE#256, the waste of M64 space will be avoided.
+
+FSP-specific bugs fixed:
+- (also fixed in skiboot-5.0.2) Fix race in firenze_get_slot_info() leading to
+  assert() with many PCI cards
+    With many PCI cards, we'd hit a race where calls to
+    firenze_add_pcidev_to_fsp_inventory would step on each other leading to
+    memory corruption and finally an assert() in the allocator being hit
+    during boot.
+- PCIe power workaround for K80 cards
+- /ibm,opal/led renamed to /ibm,opal/leds in Device Tree
+  - compatible change as no FSP based systems shipped with skiboot-5.0
+
+General improvements:
+- don't run pollers on non-boot CPUs in time_wait
+- improvements to opal-prd, pflash, libflash
+  - including new blocklevel interface in libflash
+- many minor fixes to issues found by static analysis
+- improvements in FSP error log code paths
+- code cleanup in memory allocator
+- Don't expose individual nvram partitions in the device tree, just the whole
+  flash device.
+- build improvements for building on ppc64el host
+- improvements in cpu_relax() for idle threads, needed for GCOV on large
+  machines.
+- Optimized memset() for POWER8, greatly reducing number of instructions
+  executed for boot, which helps boot time in simulators.
+- Major improvements in hello_world kernel
+  - Bloat of huge 17 instruction test case reduced to 10.
+- Disable bust_locks for general calls of abort()
+  - Should enable better error messages during abort() when other users of
+    LPC bus exist (e.g. flash)
+- unified version numbers for bundled utilities
+- external/boot_test/boot_test.sh
+  - better usable for automated boot testing
+
+Contributors
+------------
+Since skiboot-5.0, we've had the following changesets:
+
+Processed 372 csets from 27 developers
+2 employers found
+A total of 15868 lines added, 3359 removed (delta 12509)
+
+Developers with the most changesets
+Stewart Smith              117 (31.5%)
+Jeremy Kerr                 37 (9.9%)
+Cyril Bur                   33 (8.9%)
+Vasant Hegde                32 (8.6%)
+Benjamin Herrenschmidt      32 (8.6%)
+Kamalesh Babulal            22 (5.9%)
+Joel Stanley                12 (3.2%)
+Mahesh Salgaonkar           12 (3.2%)
+Alistair Popple             12 (3.2%)
+Neelesh Gupta                9 (2.4%)
+Gavin Shan                   8 (2.2%)
+Cédric Le Goater            8 (2.2%)
+Ananth N Mavinakayanahalli    8 (2.2%)
+Vipin K Parashar             6 (1.6%)
+Michael Neuling              6 (1.6%)
+Samuel Mendoza-Jonas         3 (0.8%)
+Frederic Bonnard             3 (0.8%)
+Andrew Donnellan             2 (0.5%)
+Vaidyanathan Srinivasan      2 (0.5%)
+Philippe Bergheaud           1 (0.3%)
+Shilpasri G Bhat             1 (0.3%)
+Daniel Axtens                1 (0.3%)
+Hari Bathini                 1 (0.3%)
+Michael Ellerman             1 (0.3%)
+Andrei Warkentin             1 (0.3%)
+Dan Horák                   1 (0.3%)
+Anton Blanchard              1 (0.3%)
+
+Developers with the most changed lines
+Stewart Smith             4499 (27.3%)
+Benjamin Herrenschmidt    3782 (22.9%)
+Jeremy Kerr               1887 (11.4%)
+Cyril Bur                 1654 (10.0%)
+Vasant Hegde               959 (5.8%)
+Mahesh Salgaonkar          886 (5.4%)
+Neelesh Gupta              473 (2.9%)
+Samuel Mendoza-Jonas       387 (2.3%)
+Vipin K Parashar           332 (2.0%)
+Philippe Bergheaud         171 (1.0%)
+Shilpasri G Bhat           165 (1.0%)
+Alistair Popple            151 (0.9%)
+Joel Stanley               105 (0.6%)
+Cédric Le Goater           89 (0.5%)
+Gavin Shan                  83 (0.5%)
+Frederic Bonnard            76 (0.5%)
+Kamalesh Babulal            65 (0.4%)
+Michael Neuling             46 (0.3%)
+Daniel Axtens               31 (0.2%)
+Andrew Donnellan            22 (0.1%)
+Ananth N Mavinakayanahalli   20 (0.1%)
+Anton Blanchard              3 (0.0%)
+Vaidyanathan Srinivasan      2 (0.0%)
+Hari Bathini                 2 (0.0%)
+Michael Ellerman             1 (0.0%)
+Andrei Warkentin             1 (0.0%)
+Dan Horák                   1 (0.0%)
+
+Developers with the most lines removed
+Michael Neuling             24 (0.7%)
+Hari Bathini                 1 (0.0%)
+
+Developers with the most signoffs (total 253)
+Stewart Smith              249 (98.4%)
+Mahesh Salgaonkar            4 (1.6%)
+
+Developers with the most reviews (total 24)
+Vasant Hegde                 9 (37.5%)
+Joel Stanley                 3 (12.5%)
+Gavin Shan                   2 (8.3%)
+Kamalesh Babulal             2 (8.3%)
+Samuel Mendoza-Jonas         2 (8.3%)
+Alistair Popple              2 (8.3%)
+Stewart Smith                1 (4.2%)
+Andrei Warkentin             1 (4.2%)
+Preeti U Murthy              1 (4.2%)
+Ananth N Mavinakayanahalli    1 (4.2%)
+
+Developers with the most test credits (total 1)
+Chad Larson                  1 (100.0%)
+
+Developers who gave the most tested-by credits (total 1)
+Gavin Shan                   1 (100.0%)
+
+Developers with the most report credits (total 4)
+Benjamin Herrenschmidt       2 (50.0%)
+Chad Larson                  1 (25.0%)
+Andrei Warkentin             1 (25.0%)
+
+Developers who gave the most report credits (total 4)
+Stewart Smith                3 (75.0%)
+Gavin Shan                   1 (25.0%)
+
+Top changeset contributors by employer
+IBM                        369 (99.2%)
+(Unknown)                    3 (0.8%)
+
+Top lines changed by employer
+IBM                       16497 (100.0%)
+(Unknown)                    3 (0.0%)
+
+Employers with the most signoffs (total 253)
+IBM                        253 (100.0%)
+
+Employers with the most hackers (total 27)
+IBM                         24 (88.9%)
+(Unknown)                    3 (11.1%)
+