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author | Stewart Smith <stewart@linux.vnet.ibm.com> | 2017-06-09 14:12:47 +1000 |
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committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2017-06-09 14:13:18 +1000 |
commit | bab10aea96277156edc008f7706e0ded61c4f8aa (patch) | |
tree | 4ef09e7300d55249fa851fb9432b92ffaaab86da /doc | |
parent | 700b8962e5fef208c5c8c5b754d58178ea3ca647 (diff) | |
download | skiboot-bab10aea96277156edc008f7706e0ded61c4f8aa.zip skiboot-bab10aea96277156edc008f7706e0ded61c4f8aa.tar.gz skiboot-bab10aea96277156edc008f7706e0ded61c4f8aa.tar.bz2 |
Add skiboot-5.4.5 release notes
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
(cherry picked from commit df2984393d40221b6d963839f4885d8fb8f4ce27)
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'doc')
-rw-r--r-- | doc/release-notes/skiboot-5.4.5.rst | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/doc/release-notes/skiboot-5.4.5.rst b/doc/release-notes/skiboot-5.4.5.rst new file mode 100644 index 0000000..cbb5e70 --- /dev/null +++ b/doc/release-notes/skiboot-5.4.5.rst @@ -0,0 +1,56 @@ +.. _skiboot-5.4.5: + +============= +skiboot-5.4.5 +============= + +skiboot-5.4.5 was released on Friday June 9th, 2017. It replaces +:ref:`skiboot-5.4.4` as the current stable release in the 5.4.x series. + +Over :ref:`skiboot-5.4.4`, we have a small number of bug fixes: + + +- On FSP platforms: notify FSP of Platform Log ID after Host Initiated Reset Reload + Trigging a Host Initiated Reset (when the host detects the FSP has gone + out to lunch and should be rebooted), would cause "Unknown Command" messages + to appear in the OPAL log. + + This patch implements those messages. + + Log showing unknown command: :: + + / # cat /sys/firmware/opal/msglog | grep -i ,3 + [ 110.232114723,3] FSP: fsp_trigger_reset() entry + [ 188.431793837,3] FSP #0: Link down, starting R&R + [ 464.109239162,3] FSP #0: Got XUP with no pending message ! + [ 466.340598554,3] FSP-DPO: Unknown command 0xce0900 + [ 466.340600126,3] FSP: Unhandled message ce0900 + +- hw/i2c: Fix early lock drop + + When interacting with an I2C master the p8-i2c driver (common to p9) + aquires a per-master lock which it holds for the duration of it's + interaction with the master. Unfortunately, when + p8_i2c_check_initial_status() detects that the master is busy with + another transaction it drops the lock and returns OPAL_BUSY. This is + contrary to the driver's locking strategy which requires that the + caller aquire and drop the lock. This leads to a crash due to the + double unlock(), which skiboot treats as fatal. + +- head.S: store all of LR and CTR + + When saving the CTR and LR registers the skiboot exception handlers use the + 'stw' instruction which only saves the lower 32 bits of the register. Given + these are both 64 bit registers this leads to some strange register dumps, + for example: :: + + *********************************************** + Unexpected exception 200 ! + SRR0 : 0000000030016968 SRR1 : 9000000000201000 + HSRR0: 0000000000000180 HSRR1: 9000000000001000 + LR : 3003438830823f50 CTR : 3003438800000018 + CFAR : 00000000300168fc + CR : 40004208 XER: 00000000 + + In this dump the upper 32 bits of LR and CTR are actually stack gunk + which obscures the underlying issue. |