Add skiboot 5.5.0-rc1 release notes

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

3 files changed, 865 insertions, 0 deletions

diff --git a/doc/opal-api/opal-signal-system-reset-145.rst b/doc/opal-api/opal-signal-system-reset-145.rst
index 4c1ee937..3ddb6845 100644
--- a/doc/opal-api/opal-signal-system-reset-145.rst
+++ b/doc/opal-api/opal-signal-system-reset-145.rst
@@ -1,3 +1,5 @@
+.. _OPAL_SIGNAL_SYSTEM_RESET:
+
 OPAL_SIGNAL_SYSTEM_RESET
 ========================
 ::
diff --git a/doc/release-notes/skiboot-5.1.19.rst b/doc/release-notes/skiboot-5.1.19.rst
index e13a4712..3779e8f2 100644
--- a/doc/release-notes/skiboot-5.1.19.rst
+++ b/doc/release-notes/skiboot-5.1.19.rst
@@ -1,3 +1,5 @@
+.. _skiboot-5.1.19:
+
 skiboot-5.1.19
 --------------
 
diff --git a/doc/release-notes/skiboot-5.5.0-rc1.rst b/doc/release-notes/skiboot-5.5.0-rc1.rst
new file mode 100644
index 00000000..fd6fd71b
--- /dev/null
+++ b/doc/release-notes/skiboot-5.5.0-rc1.rst
@@ -0,0 +1,861 @@
+.. _skiboot-5.5.0-rc1:
+
+skiboot-5.5.0-rc1
+=================
+
+skiboot-5.5.0-rc1 was released on Tuesday March 28th 2017. It is the first
+release candidate of skiboot 5.5, which will become the new stable release
+of skiboot following the 5.4 release, first released November 11th 2016.
+
+skiboot-5.5.0-rc1 contains all bug fixes as of :ref:`skiboot-5.4.3`
+and :ref:`skiboot-5.1.19` (the currently maintained stable releases).
+
+For how the skiboot stable releases work, see :ref:`stable-rules` for details.
+
+The current plan is to cut the final 5.5.0 by April 8th, with skiboot 5.5.0
+being for all POWER8 and POWER9 platforms in op-build v1.16 (Due April 12th).
+This is a short cycle as this release is mainly targetted towards POWER9
+bringup efforts.
+
+Following skiboot-5.5.0, we will move to a regular six week release cycle,
+similar to op-build, but slightly offset to allow for a short stabilisation
+period. Expected release dates and contents are tracked using GitHub milestone
+and issues: https://github.com/open-power/skiboot/milestones
+
+Over skiboot-5.4, we have the following changes:
+
+New Platforms
+-------------
+- SuperMicro's (SMC) P8DNU: An astbmc based POWER8 platform
+- Add a generic platform to help with bringup of new systems.
+- Four POWER9 based systems (NOTE: All POWER9 systems should be considered
+  for bringup use only at this point):
+
+  - Romulus
+  - Witherspoon (a POWER9 system with NVLink2 attached GPUs)
+  - Zaius (OpenCompute platform, also known as "Barreleye 2")
+  - ZZ (FSP based system)
+
+New features
+------------
+
+- System reset IPI facility and Mambo implementation
+  Add an opal call :ref:`OPAL_SIGNAL_SYSTEM_RESET` which allows system reset
+  exceptions to be raised on other CPUs and act as an NMI IPI. There
+  is an initial simple Mambo implementation, but allowances are made
+  for a more complex hardware implementation.
+
+  The Mambo implementation is based on the RFC implementation for POWER8
+  hardware (see https://patchwork.ozlabs.org/patch/694794/) which we hope
+  makes it into a future release.
+
+  This implements an in-band NMI equivalent.
+- add CONTRIBUTING.md, ensuring that people new to the project have a one-stop
+  place to find out how to get started.
+- interrupts: Add optional name for OPAL interrupts
+
+  This adds the infrastructure for an interrupt source to provide
+  a name for an interrupt directed toward OPAL. Those names will
+  be put into an "opal-interrupts-names" property which is a
+  standard DT string list corresponding 1:1 with the "opal-interrupts"
+  property. PSI interrupts get names, and this is visible in Linux
+  through /proc/interrupts
+- platform: add OPAL_REBOOT_FULL_IPL reboot type
+
+  There may be circumstances in which a user wants to force a full IPL reboot
+  rather than using fast reboot. Add a new reboot type, OPAL_REBOOT_FULL_IPL,
+  that disables fast reboot. On platforms which don't support fast reboot,
+  this will be equivalent to a normal reboot.
+- phb3: Trick to allow control of the PCIe link width and speed
+
+  This implements a hook inside OPAL that catches 16 and 32 bit writes
+  to the link status register of the PHB.
+
+  It allows you to write a new speed or a new width, and OPAL will then
+  cause the PHB to renegociate.
+
+  Example:
+
+    First read the link status on PHB4: ::
+
+      setpci -s 0004:00:00.0 0x5a.w
+      a103
+
+    It's at x16 Gen3 speed (8GT/s)
+
+    bits 0x0ff0 are the width and 0x000f the speed. The width can be
+    1 to 16 and the speed 1 to 3 (2.5, 5 and 8GT/s)
+
+    Then try to bring it down to 1x Gen1 : ::
+
+      setpci -s 0004:00:00.0 0x5a.w=0xa011
+
+    Observe the result in the PHB: ::
+
+      / # lspci -s 0004:00:00.0 -vv
+      0004:00:00.0 PCI bridge: IBM Device 03dc (prog-if 00 [Normal decode])
+      .../...
+      LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk- DLActive+ BWMgmt- ABWMgmt+
+
+    And in the device: ::
+
+      / # lspci -s 0004:01:00.0 -vv
+      .../...
+      LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
+
+- core/init: Add hdat-map property to OPAL node.
+
+  Exports the HDAT heap to the OS. This allows the OS to view the HDAT heap
+  directly.  This allows us to view the HDAT area without having to use
+  getmemproc.
+
+- Add a generic platform: If /bmc in device tree, attempt to init one
+  For the most part, this gets us somewhere on some OpenPOWER systems
+  before there's a platform file for that machine.
+
+  Useful in bringup only, and marked as such with scary looking log
+  messages.
+
+
+Core
+----
+
+- asm: Don't try to set LPCR:LPES1 on P8 and P9, the bit doesn't exist.
+
+- pci: Add a framework for quirks
+
+  In future we may want to be able to do fixups for specific PCI devices in
+  skiboot, so add a small framework for doing this.
+
+  This is not intended for the same purposes as quirks in the Linux kernel,
+  as the PCI devices that quirks can match for in skiboot are not properly
+  configured.  This is intended to enable having a custom path to make
+  changes that don't directly interact with the PCI device, for example
+  adding device tree entries.
+
+- hw/slw: fix possible NULL dereference
+- slw: Print enabled stop states on boot
+- uart: Fix Linux pass-through policy, provide NVRAM override option
+- libc/stdio/vsnprintf.c: add explicit fallthrough, this silences a recent
+  (GCC 7.x) warning
+- init: print the FDT blob size in decimal
+- init: Print some more info before booting linux
+
+  The kernel command line from nvram and the stdout-path are
+  useful to know when debugging console related problems.
+
+- Makefile: Disable stack protector due to gcc problems
+
+  Depending on how it was built, gcc will use the canary from a global
+  (works for us) or from the TLS (doesn't work for us and accesses
+  random stuff instead).
+
+  Fixing that would be tricky. There are talks of adding a gcc option
+  to force use of globals, but in the meantime, disable the stack
+  protector.
+- Stop using 3-operand cmp[l][i] for latest binutils
+  Since a5721ba270, binutils does not support 3-operand cmp[l][i].
+  This adds (previously optional) parameter L.
+- buddy: Add a simple generic buddy allocator
+- stack: Don't recurse into __stack_chk_fail
+- Makefile: Use -ffixed-r13
+  We use r13 for our own stuff, make sure it's properly fixed
+- Always set ibm,occ-functional-state correctly
+- psi: fix the xive registers initialization on P8, which seems to be fine
+  for real HW but causes a lof of pain under qemu
+- slw: Set PSSCR value for idle states
+- Limit number of "Poller recursion detected" errors to display
+
+  In some error conditions, we could spiral out of control on this
+  and spend all of our time printing the exact same backtrace.
+
+  Limit it to 16 times, because 16 is a nice number.
+- slw: do SLW timer testing while holding xscom lock
+
+  We add some routines that let a caller get the xscom lock once and
+  then do a bunch of xscoms while holding it.
+  In some situations without this, it could take long enough to get
+  the xscom lock that the 1ms timeout would expire and we'd falsely
+  think the SLW timer didn't work when in fact it did.
+- wait_for_resource_loaded: don't needlessly sleep for 5ms
+- run pollers in cpu_process_local_jobs() if running job synchonously
+- fsp: Don't recurse pollers in ibm_fsp_terminate
+- chiptod: More hardening against -1 chip ID
+- interrupts: Rewrite/correct doc for opal_set/get_xive
+- cpu: Don't enable nap mode/PM mode on non-P8
+- platform: Call generic platform probe and init UART there
+- psi: Don't register more interrupts than the HW supports
+- psi: Add DT option to disable LPC interrupts
+
+I2C and TPM
+-----------
+- p8i2c: Use calculated poll_interval when booting OPAL
+  Otherwise we'd default to 2seconds (TIMER_POLL) during boot on
+  chips with a functional i2c interrupt, leading to slow i2c
+  during boot (or hitting timeouts instead).
+- i2c: Add i2c_run_req() to crank the state machine for a request
+- tpm_i2c_nuvoton: work out the polling time using mftb()
+- tpm_i2c_nuvoton: handle errors after reading the tpm fifo
+- tpm_i2c_nuvoton: cleanup variables in tpm_read_fifo()
+- tpm_i2c_nuvoton: handle errors after writting the tpm fifo
+- tpm_i2c_nuvoton: cleanup variables in tpm_write_fifo()
+- tpm_i2c_nuvoton: handle errors after writing sts.commandReady in step 5
+- tpm_i2c_nuvoton: handle errors after writing sts.go
+- tpm_i2c_nuvoton: handle errors after checking the tpm fifo status
+- tpm_i2c_nuvoton: return burst_count in tpm_read_burst_count()
+- tpm_i2c_nuvoton: isolate the code that handles the TPM_TIMEOUT_D timeout
+- tpm_i2c_nuvoton: handle errors after reading sts.commandReady
+- tpm_i2c_nuvoton: add tpm_status_read_byte()
+- tpm_i2c_nuvoton: add tpm_check_status()
+- tpm_i2c_nuvoton: rename defines to shorter names
+- tpm_i2c_interface: decouple rc from being done with i2c request
+- tpm_i2c_interface: set timeout before each request
+- i2c: Add nuvoton quirk, disallowing i2cdetect as it locks TPM
+
+  p8-i2c reset things manually in some error conditions
+- stb: create-container and wrap skiboot in Secure/Trusted Boot container
+
+  We produce **UNSIGNED** skiboot.lid.stb and skiboot.lid.xz.stb as build
+  artifacts.
+
+  These are suitable blobs for flashing onto Trusted Boot enabled op-build
+  builds *WITH* the secure boot jumpers *ON* (i.e. *NOT* in secure mode).
+  It's just enough of the Secure and Trusted Boot container format to
+  make Hostboot behave.
+
+
+PCI
+---
+- core/pci: Support SRIOV VFs
+
+  Currently, skiboot can't see SRIOV VFs. It introduces some troubles
+  as I can see: The device initialization logic (phb->ops->device_init())
+  isn't applied to VFs, meaning we have to maintain same and duplicated
+  mechanism in kernel for VFs only. It introduces difficulty to code
+  maintaining and prone to lose sychronization.
+
+  This was motivated by bug reported by Carol: The VF's Max Payload
+  Size (MPS) isn't matched with PF's on Mellanox's adapter even kernel
+  tried to make them same. It's caused by readonly PCIECAP_EXP_DEVCTL
+  register on VFs. The skiboot would be best place to emulate this bits
+  to eliminate the gap as I can see.
+
+  This supports SRIOV VFs. When the PF's SRIOV capability is populated,
+  the number of maximal VFs (struct pci_device) are instanciated, but
+  but not usable yet. In the mean while, PCI config register filter is
+  registered against PCIECAP_SRIOV_CTRL_VFE to capture the event of
+  enabling or disabling VFs. The VFs are initialized, put into the PF's
+  children list (pd->children), populate its PCI capabilities, and
+  register PCI config register filter against PCICAP_EXP_DEVCTL. The
+  filter's handler caches what is written to MPS field and returns
+  the cached value on read, to eliminate the gap mentioned as above.
+
+- core/pci: Avoid hreset after freset
+
+  Commit 5ac71c9 ("pci: Avoid hot resets at boot time") missed to
+  avoid hot reset after fundamental reset for PCIe common slots.
+
+  This fixes it.
+- core/pci: Enforce polling PCIe link in hot-add path
+
+  In surprise hot-add path, the power state isn't changed on hardware.
+  Instead, we set the cached power state (@slot->power_state) and
+  return OPAL_SUCCESS. The upper layer starts the PCI probing immediately
+  when receiving OPAL_SUCCESS. However, the PCIe link behind the PCI
+  slot is likely down. Nothing will be probed from the PCI slot even
+  we do have PCI adpater connected to the slot.
+
+  This fixes the issue by returning OPAL_ASYNC_COMPLETION to force
+  upper layer to poll the PCIe link before probing the PCI devices
+  behind the slot in surprise and managed hot-add paths.
+- hw/phb3: fix error handling in complete reset
+    During a complete reset, when we get a timeout waiting for pending
+    transaction in state PHB3_STATE_CRESET_WAIT_CQ, we mark the PHB as
+    permanently broken.
+
+    Set the state to PHB3_STATE_FENCED so that the kernel can retry the
+    complete reset.
+- phb3: Lock the PHB on set_xive callbacks
+
+p8dnu platform
+--------------
+- astbmc/p8dnu: Enable PCI slot's power supply on PEX9733 in hot-add path
+- astbmc/p8dnu: Enable PCI slot's power supply on PEX8718 in hot-add path
+- core/pci: Mark broken PDC on slots without surprise hotplug capability
+
+  We has to support surprise hotplug on PCI slots that don't support
+  it on hardware. So we're fully utilizing the PCIe link state change
+  event to detect the events (hot-remove and hot-add). The PDC (Presence
+  Detection Change) event isn't reliable for the purpose. For example,
+  PEX8718 on superMicro's machines.
+
+  This adds another PCI slot property "ibm,slot-broken-pdc" in the
+  device-tree, to indicate the PDC isn't reliable on those (software
+  claimed) surprise pluggable slots.
+- core/pci: Fix PCIe slot's presence
+
+  According to PCIe spec, the presence bit is hardcoded to 1 if PCIe
+  switch downstream port doesn't support slot capability. The register
+  used for the check in pcie_slot_get_presence_state() is wrong. It
+  should be PCIe capability register instead of PCIe slot capability
+  register. Otherwise, we always have present bit on the PCI topology.
+  The issue is found on Supermicro's p8dtu2u machine: ::
+
+     # lspci -t
+     -+-[0022:00]---00.0-[01-08]----00.0-[02-08]--+-01.0-[03]----00.0
+      |                                           \-02.0-[04-08]--
+     # cat /sys/bus/pci/slots/S002204/adapter
+     1
+     # lspci -vvs 0022:02:02.0
+     # lspci -vvs 0022:02:02.0
+     0022:02:02.0 PCI bridge: PLX Technology, Inc. PEX 8718 16-Lane, \
+     5-Port PCI Express Gen 3 (8.0 GT/s) Switch (rev ab) (prog-if 00 [Normal decode])
+        :
+     Capabilities: [68] Express (v2) Downstream Port (Slot+), MSI 00
+        :
+        SltSta:    Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet- Interlock-
+                   Changed: MRL- PresDet- LinkState-
+
+    This fixes the issue by checking the correct register (PCIe capability).
+    Also, the register's value is cached in advance as we did for slot and
+    link capability.
+- core/pci: More reliable way to update PCI slot power state
+
+  The power control bit (SLOT_CTL, offset: PCIe cap + 0x18) isn't
+  reliable enough to reflect the PCI slot's power state. Instead,
+  the power indication bits are more reliable comparatively. This
+  leads to mismatch between the cached power state and PCI slot's
+  presence state, resulting in the hotplug driver in kernel refuses
+  to unplug the devices properly on the request. The issue was
+  found on below NVMe card on "supermicro,p8dtu2u" machine. We don't
+  have this issue on the integrated PLX 8718 switch. ::
+
+     # lspci
+     0022:01:00.0 PCI bridge: PLX Technology, Inc. PEX 9733 33-lane, \
+                  9-port PCI Express Gen 3 (8.0 GT/s) Switch (rev aa)
+     0022:02:01.0 PCI bridge: PLX Technology, Inc. PEX 9733 33-lane, \
+                  9-port PCI Express Gen 3 (8.0 GT/s) Switch (rev aa)
+     0022:02:04.0 PCI bridge: PLX Technology, Inc. PEX 9733 33-lane, \
+                  9-port PCI Express Gen 3 (8.0 GT/s) Switch (rev aa)
+     0022:02:05.0 PCI bridge: PLX Technology, Inc. PEX 9733 33-lane, \
+                  9-port PCI Express Gen 3 (8.0 GT/s) Switch (rev aa)
+     0022:02:06.0 PCI bridge: PLX Technology, Inc. PEX 9733 33-lane, \
+                  9-port PCI Express Gen 3 (8.0 GT/s) Switch (rev aa)
+     0022:02:07.0 PCI bridge: PLX Technology, Inc. PEX 9733 33-lane, \
+                  9-port PCI Express Gen 3 (8.0 GT/s) Switch (rev aa)
+     0022:17:00.0 Non-Volatile memory controller: Device 19e5:0123 (rev 45)
+
+    This updates the cached PCI slot's power state using the power
+    indication bits instead of power control bit, to fix above issue.
+
+Utilities
+---------
+
+- opal-prd: Direct systemd to always restart opal-prd
+  Always restart the opal-prd daemon, irrespective of why it stopped.
+- external/ffspart: Simple C program to be able to make an FFS partition
+- getscom: Add chip info for P9.
+- gard: Fix make dist target
+- pflash/libflash: arch_flash_arm: Don't assume mtd labels are short
+
+libffs
+------
+- libffs: Understand how to create FFS partition TOCs and entries.
+
+BMC Based systems
+-----------------
+- platforms/astbmc: Support PCI slots for palmetto
+- habanero/slottable: Remove Network Mezz(2, 0) from PHB1.
+- BMC/PCI: Check slot tables against detected devices
+  On BMC machines, we have slot tables of built in PHBs, slots and devices
+  that are physically present in the system (such as the BMC itself). We
+  can use these tables to check what we *detected* against what *should*
+  be in the system and throw an error if they differ.
+
+  We have seen this occur a couple of times while still booting, giving the
+  user just an empty petitboot screen and not much else to go on. This
+  patch helps in that we get a skiboot error message, and at some point
+  in the future when we pump them up to the OS we could get a big friendly
+  error message telling you you're having a bad day.
+- pci/quirk: Populate device tree for AST2400 VGA
+
+  Adding these properties enables the kernel to function in the same way
+  that it would if it could no longer access BMC configuration registers
+  through a backdoor, which may become the default in future.
+
+  The comments describe how isolating the host from the BMC could be
+  achieved in skiboot, assuming all kernels that the system boots
+  support this.  Isolating the BMC and the host from each other is
+  important if they are owned by different parties; for example, a cloud
+  provider renting machines "bare metal".
+
+- astbmc/pnor: Use mbox-flash for flash accesses
+
+  If the BMC is MBOX protocol aware, request flash reads/writes over the
+  MBOX regs. This inits the blocklevel for pnor access with mbox-flash.
+- ast: Account for differences between 2400 vs 2500
+- platform: set default bmc_platform
+  The bmc_platform pointer is set to NULL by default and on non-AMI BMC
+  platforms. As a result a few places in hw/ipmi/ipmi-sel.c will blindly
+  dereference a NULL pointer.
+
+POWER9
+------
+
+- external: Update xscom utils for type 1 indirect accesses
+- xscom: Harden indirect writes
+- xscom: Add POWER9 scom reset
+- homer : Enable HOMER region reservation for POWER9
+- slw: Define stop idle states for P9 DD1
+- slw: Fix parsing of supported STOP states
+- slw: only enable supported STOP states
+- dts: add support for p9 cores
+
+- asm: Add POWER9 case to init_shared_sprs
+
+  For now, setup the HID and HMEER. We'll add more as we get
+  good default values from HW.
+- xive/psi/lpc: Handle proper clearing of LPC SerIRQ latch on POWER9 DD1
+- lpc: Mark the power9 LPC bus as compatible with power8
+- Fix typo in PIR mask for POWER9. Fixes booting multi-chip.
+- vpd: add vpd_valid() to check keyword VPD blobs
+
+  Adds a function to check whether a blob is a valid IBM ASCII keyword
+  VPD blob. This allows us to recognise when we do and do not have a VPD
+  blob and act accordingly.
+- core/cpu.c: Use a device-tree node to detect nest mmu presence
+  The nest mmu address scom was hardcoded which could lead to boot
+  failure on POWER9 systems without a nest mmu. For example Mambo
+  doesn't model the nest mmu which results in  failure when
+  calling opal_nmmu_set_ptcr() during kernel load.
+- psi: Fix P9 BAR setup on multi-chips
+
+PHB4:
+
+  - phb4: Fix TVE encoding for start address
+  - phb4: Always assign powerbus BARs
+
+    HostBoot configure them with weird values that confuse us, instead
+    let's just own the assignment. This is temporary, I will centralize
+    memory map management next but this gets us going.
+  - phb4: Fix endian issue with link control2/status2 registers
+    Fixes training at larger than PCIe Gen1 speeds.
+  - phb4: Add ability to log config space access
+    Useful for debugging
+  - phb4: Change debug prints
+    Currently we print "PHB4" and mean either "PHB version 4" or "PHB
+    number 4" which can be quite confusing.
+  - phb4: Fix config space enable bits on DD1
+  - phb4: Fix location of EEH enable bits
+  - phb4: Fix setting of max link speed
+  - phb4: Updated inits as of PHB4 spec 0.52
+
+HDAT fixes:
+
+  - hdat: Parse BMC nodes much earlier
+
+    This moves the parsing of the BMC and LPC details to the start of the
+    HDAT parsing. This allows us to enable the Skiboot log console earlier
+    so we can get debug output while parsing the rest of the HDAT.
+  - astbmc: Don't do P8 PSI or DT fixups on P9
+
+    Previously the HDAT format was only ever used with IBM hardware so it
+    would store vital product data (VPD) blobs in the IBM ASCII Keyword VPD
+    format. With P9 HDAT is used on OpenPower machines which use Industry
+    Standard DIMMs that provide their product data through a "Serial Present
+    Detect" EEPROM mounted on the DIMM.
+
+    The SPD blob has a different format and is exported in the device-tree
+    under the "spd" property rather than the "ibm,vpd" property. This patch
+    adds support for recognising these blobs and placing them in the
+    appropriate DT property.
+  - hdat: Add __packed to all HDAT structures and workaround HB reserve
+
+    Some HDAT structures aren't properly aligned. We were using __packed
+    on some but not others and got at least one wrong (HB reserve). This
+    adds it everywhere to avoid such problems.
+
+    However this then triggers another problem where HB gives us a
+    crazy range (0.256M) to reserve with no label, which triggers an
+    assertion failure later on in mem_regions.c.
+
+    So also add a test to skip any region starting at 0 until we can
+    undertand that better and have it fixed one way or another.
+  - hdat: Ignore broken memory reserves
+
+    Ignore HDAT memory reserves > 512MB.  These are considered bogus and
+    workaround known HDAT bugs.
+  - hdat: Add BMC device-tree node for P9 OpenPOWER systems
+  - hdat: Fix interrupt & device_type of UART node
+
+    The interrupt should use a standard "interrupts" property. The UART
+    node also need a device_type="serial" property for historical reasons
+    otherwise Linux won't pick it up.
+  - parse and export STOP levels
+  - add new sppcrd_chip_info fields
+  - add radix-AP-encodings
+  - stop using proc_int_line in favor of pir
+  - rename add_icp() to add_xics_icp()
+  - Add support for PHB4
+  - create XIVE nodes under each xscom node
+  - Add P9 compatible property
+  - Parse hostboot memory reservations from HDAT
+  - Add new fields to IPL params structure and update sys family for p9.
+  - Fix ibm,pa-features for all CPU types
+  - Fix XSCOM nodes for P9
+  - Remove deprecated 'ibm, mem-interleave-scope' from DT on POWER9
+  - Grab system model name from HDAT when available
+  - Grab vendor information from HDAT when available
+  - SPIRA-H/S changes for P9
+  - Add BMC and LPC IOPATH support
+  - handle ISDIMM SPD blobs
+  - make HDIF_child() print more useful errors
+  - Add PSI HB xscom details
+  - Add new fields to proc_init_data structure
+  - Add processor version check for hs service ntuple
+  - add_iplparams_serial - Validate HDIF_get_iarray_size() return value
+
+
+XIVE:
+
+The list of XIVE fixes and updates is extensive. Below is only a portion of
+the changes that have gone into skiboot 5.5.0-rc1 for the new XIVE hardware
+that is present in POWER9:
+
+  - xive: Enable backlog on queues
+  - xive: Use for_each_present_cpu() for setting up XIVE
+  - xive: Fix logic in opal_xive_get_xirr()
+  - xive: Properly initialize new VP and EQ structures
+  - xive: Improve/fix EOI of LSIs
+  - xive: Add FIXME comments about mask/umask races
+  - xive: Fix memory barrier in opal_xive_get_xirr()
+  - xive: Don't try to find a target EQ for prio 0xff
+  - xive: Bump table sizes in direct mode
+  - xive: Properly register escalation interrupts
+  - xive: Split the OPAL irq flags from the internal ones
+  - xive: Don't touch ESB masks unless masking/unmasking
+  - xive: Fix xive_get_ir_targetting()
+  - xive: Cleanup escalation PQ on queue change
+  - xive: Add *any chip* for allocating interrupts
+  - xive: Add chip_id to get_vp_info
+  - xive: Add opal_xive_get/set_vp_info
+  - xive: Add VP alloc/free OPAL functions
+  - xive: Workaround for bad DD1 checker
+  - xive: Add more checks for exploitation mode
+  - xive: Add support for EOIs via OPAL
+  - xive/phb4: Work around broken LSI control on P9 DD1
+  - xive: Forward interrupt names callback
+  - xive: Export opal_xive_reset() arguments in OPAL API
+  - xive: Add interrupt allocator
+  - xive: Implement xive_reset
+  - xive: Don't assert if xive_get_vp() fails
+  - xive: Expose exploitation mode DT properties
+  - xive: Use a constant for max# of chips
+  - xive: Keep track of which interrupts were ever enabled
+    In order to speed up xive reset
+  - xive: Implement internal VP allocator
+  - xive: Add xive_get/set_queue_info
+  - xive: Add helpers to encode and decode VP numbers
+  - xive: Add API to donate pages in indirect mode
+  - xive: Add asynchronous cache updates and update irq targetting
+  - xive: Split xive_provision_cpu() and use cache watch for VP
+  - xive: Add cache scrub to push watch updates to memory
+  - xive: Mark XIVE owned EQs with a specific flag
+  - xive: Use an allocator for EQDs
+  - xive: Break assumption that block ID == chip ID
+  - xive/phb4: Handle bad ESB offsets in PHB4 DD1
+  - xive: Implement get/set_irq_config APIs
+  - xive: Rework xive_set_eq_info() to store all info even when masking
+  - xive: Implement cache watch and use it for EQs
+  - xive: Add locking to some API calls
+  - xive: Add opal_xive_get_irq_info()
+  - xive: Add CPU node "interrupts" properties representing the IPIs
+  - xive: Add basic opal_xive_reset() call and exploitation mode
+  - xive: Add support for escalation interrupts
+  - xive: OPAL API update
+  - xive: Add some dump facility for debugging
+  - xive: Document exploitation mode
+    (Pretty much work in progress)
+  - xive: Indirect table entries must have top bits "type" set
+  - xive: Remove unused field and clarify comment
+  - xive: Provide a way to override some IPI sources
+  - xive: Add helper to retrieve an IPI trigger port
+  - xive: Fix IPI EOI logic in opal_xive_eoi()
+  - xive: Don't try to EOI a masked source
+  - xive: Fix comments in xive_source_set_xive()
+  - xive: Fix comments in xive_get_ive()
+  - xive: Configure forwarding ports
+  - xive: Fix mangling of interrupt server# in opal_get/set_xive()
+  - xive: Fix interrupt number mangling
+
+
+Fast-reboot
+-----------
+- fast-reboot: creset PHBs on fast reboot
+  On fast reboot, perform a creset of all PHBs. This ensures that any PHBs
+  that are fenced will be working after the reboot.
+- fast-reboot: Enable fast reboot with CAPI adapters in CAPI mode
+  CAPI mode is disabled as part of OPAL_SYNC_HOST_REBOOT.
+- opal/fast-reboot: set fw_progress sensor status with IPMI_FW_PCI_INIT.
+
+CAPI
+----
+
+- hmi: Print CAPP FIR information when handling CAPP malfunction alerts
+
+FSP based systems
+-----------------
+
+- hw/fsp: Do not queue SP and SPCN class messages during reset/reload
+  This could cause soft lockups if FSP reset reload was done while in OPAL
+  During FSP R/R, the FSP is inaccessible and will lose state. Messages to the
+  FSP are generally queued for sending later.
+
+Tests
+-----
+- core/test/run-trace: Reduce number of samples when running under valgrind
+    This reduces 'make check' run time by ~10 seconds on my laptop,
+    and just the run-trace test itself takes 15 seconds less (under valgrind).
+- test/sreset_world: Kind of like Hello World, but from the SRESET vector.
+  A regression test for the mambo implementation of OPAL_SIGNAL_SYSTEM_RESET.
+- nvram-format: Fix endian issues
+    NVRAM formats are always BE, so let's use the sparse annotation to catch
+    any issues (and correct said issues).
+
+    On LE platforms, the test was erroneously passing as with building the
+    nvram-format code on LE we were produces an incorrect NVRAM image.
+
+- test/hello_world: use P9MAMBO to differentiate from P8
+- hdata_to_dt: Specify PVR on command line
+- hdata/test: Add DTS output for the test cases
+- hdata/test: strip blobs from the DT output
+- mambo: add mprintf()
+
+    mprintf() is printf(), but it goes straight to the mambo console. This
+    allows it to be independent of Skiboot's actual console infrastructure
+    so it can be used for debugging the console drivers and for debugging
+    code that runs before the console is setup.
+- generate-fwts-olog: add support for parsing prerror()
+- Add bitmap test
+    The worst test suite ever
+- mambo_utils: add ascii output to hexdump
+- mambo_utils: add p_str <addr> [limit]
+- mambo_utils: make p return a value
+- hello_world: print out full path of missing MAMBO_BINARY
+- print-stb-container: Fix build on centos7
+
+- Travis-ci improvements:
+  - install expect on ubuntu 12.04, disable qemu on 16.04/latest
+  - build and test more on centos7
+  - hello_world: run p9 mambo tests
+  - install systemsim-p8 on centos7
+  - install systemsim-p8 on centos6
+  - install systemsim-p9
+  - enable fedora25
+  - always pull new docker image
+  - add fedora rawhide
+
+- Add fwts annotation for duplicate DT node entries.
+
+    Reference bug: https://github.com/open-power/op-build/issues/751
+- external/fwts: Add 'last-tag' to FWTS olog output
+  This isn't so useful at the moment, but this will make cleaning out
+  crufty old error definitions much easier.
+- external/fwts: Add FWTS olog merge script
+  A script to merge olog error definitions from multiple skiboot versions
+  into a single olog JSON file. Will prompt when conflicting patterns are
+  found to update the pattern, or add both.
+- mambo: fake NVRAM support
+- mambo: Add Fake NVRAM driver
+- external/mambo: add shortcut to print all GPRs
+
+
+
+Contributors
+------------
+
+Processed 363 csets from 28 developers.
+A total of 18105 lines added, 16499 removed (delta 1606)
+
+Developers with the most changesets
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+========================== === =======
+Developer                    # %
+========================== === =======
+Benjamin Herrenschmidt     138 (38.0%)
+Stewart Smith               56 (15.4%)
+Oliver O'Halloran           47 (12.9%)
+Michael Neuling             18 (5.0%)
+Gavin Shan                  15 (4.1%)
+Claudio Carvalho            14 (3.9%)
+Vasant Hegde                11 (3.0%)
+Cyril Bur                   11 (3.0%)
+Andrew Donnellan            11 (3.0%)
+Ananth N Mavinakayanahalli   5 (1.4%)
+Cédric Le Goater             5 (1.4%)
+Pridhiviraj Paidipeddi       5 (1.4%)
+Shilpasri G Bhat             4 (1.1%)
+Nicholas Piggin              4 (1.1%)
+Russell Currey               3 (0.8%)
+Alistair Popple              2 (0.6%)
+Jack Miller                  2 (0.6%)
+Chris Smart                  2 (0.6%)
+Matt Brown                   1 (0.3%)
+Michael Ellerman             1 (0.3%)
+Frederic Barrat              1 (0.3%)
+Hank Chang                   1 (0.3%)
+Willie Liauw                 1 (0.3%)
+Werner Fischer               1 (0.3%)
+Jeremy Kerr                  1 (0.3%)
+Patrick Williams             1 (0.3%)
+Joel Stanley                 1 (0.3%)
+Alexey Kardashevskiy         1 (0.3%)
+========================== === =======
+
+Developers with the most changed lines
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+=========================== ===== =======
+Developer                    #    %
+=========================== ===== =======
+Oliver O'Halloran           17961 (56.7%)
+Benjamin Herrenschmidt       5509 (17.4%)
+Cyril Bur                    2801 (8.8%)
+Stewart Smith                1649 (5.2%)
+Gavin Shan                    653 (2.1%)
+Claudio Carvalho              489 (1.5%)
+Willie Liauw                  361 (1.1%)
+Ananth N Mavinakayanahalli    340 (1.1%)
+Andrew Donnellan              315 (1.0%)
+Michael Neuling               240 (0.8%)
+Shilpasri G Bhat              228 (0.7%)
+Nicholas Piggin               219 (0.7%)
+Vasant Hegde                  207 (0.7%)
+Russell Currey                158 (0.5%)
+Jack Miller                   127 (0.4%)
+Cédric Le Goater              126 (0.4%)
+Chris Smart                    95 (0.3%)
+Hank Chang                     56 (0.2%)
+Pridhiviraj Paidipeddi         47 (0.1%)
+Alistair Popple                39 (0.1%)
+Matt Brown                     29 (0.1%)
+Michael Ellerman                3 (0.0%)
+Alexey Kardashevskiy            2 (0.0%)
+Frederic Barrat                 1 (0.0%)
+Werner Fischer                  1 (0.0%)
+Jeremy Kerr                     1 (0.0%)
+Patrick Williams                1 (0.0%)
+Joel Stanley                    1 (0.0%)
+=========================== ===== =======
+
+Developers with the most lines removed
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+=========================== ===== =======
+Developer                       # %
+=========================== ===== =======
+Oliver O'Halloran            8810 (53.4%)
+Ananth N Mavinakayanahalli     98 (0.6%)
+Alistair Popple                 9 (0.1%)
+Michael Ellerman                3 (0.0%)
+Werner Fischer                  1 (0.0%)
+=========================== ===== =======
+
+Developers with the most signoffs
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Total 322
+
+======================== ===== =======
+Developer                    # %
+======================== ===== =======
+Stewart Smith              307 (95.3%)
+Michael Neuling              6 (1.9%)
+Oliver O'Halloran            3 (0.9%)
+Benjamin Herrenschmidt       2 (0.6%)
+Vaidyanathan Srinivasan      1 (0.3%)
+Hank Chang                   1 (0.3%)
+Jack Miller                  1 (0.3%)
+Gavin Shan                   1 (0.3%)
+======================== ===== =======
+
+Developers with the most reviews
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Total: 45
+
+======================== ===== =======
+Developer                    # %
+======================== ===== =======
+Vasant Hegde                10 (22.2%)
+Andrew Donnellan             9 (20.0%)
+Russell Currey               6 (13.3%)
+Cédric Le Goater             5 (11.1%)
+Oliver O'Halloran            4 (8.9%)
+Gavin Shan                   3 (6.7%)
+Vaidyanathan Srinivasan      2 (4.4%)
+Alistair Popple              2 (4.4%)
+Frederic Barrat              2 (4.4%)
+Mahesh Salgaonkar            1 (2.2%)
+Cyril Bur                    1 (2.2%)
+======================== ===== =======
+
+Developers with the most test credits
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Total 11
+
+======================== ===== =======
+Developer                    # %
+======================== ===== =======
+Willie Liauw                 4 (36.4%)
+Claudio Carvalho             3 (27.3%)
+Gavin Shan                   1 (9.1%)
+Michael Neuling              1 (9.1%)
+Pridhiviraj Paidipeddi       1 (9.1%)
+Chris Smart                  1 (9.1%)
+======================== ===== =======
+
+Developers who gave the most tested-by credits
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Total 11
+
+========================== ===== =======
+Developer                    #   %
+========================== ===== =======
+Gavin Shan                     4 (36.4%)
+Stewart Smith                  4 (36.4%)
+Chris Smart                    1 (9.1%)
+Oliver O'Halloran              1 (9.1%)
+Ananth N Mavinakayanahalli     1 (9.1%)
+========================== ===== =======
+
+Developers with the most report credits
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Total 7
+
+========================== === =======
+Developer                    #   %
+========================== === =======
+Hank Chang                   4 (57.1%)
+Guilherme G. Piccoli         1 (14.3%)
+Colin Ian King               1 (14.3%)
+Pradipta Ghosh               1 (14.3%)
+========================== === =======
+
+
+Developers who gave the most report credits
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Total 7
+
+========================== === =======
+Developer                    #  %
+========================== === =======
+Gavin Shan                   5 (71.4%)
+Andrew Donnellan             1 (14.3%)
+Jeremy Kerr                  1 (14.3%)
+========================== === =======