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Diffstat (limited to 'doc/release-notes/skiboot-5.10.4.rst')
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diff --git a/doc/release-notes/skiboot-5.10.4.rst b/doc/release-notes/skiboot-5.10.4.rst new file mode 100644 index 0000000..a2c3b6b --- /dev/null +++ b/doc/release-notes/skiboot-5.10.4.rst @@ -0,0 +1,28 @@ +.. _skiboot-5.10.4: + +============== +skiboot-5.10.4 +============== + +skiboot 5.10.4 was released on Wednesday April 4th, 2018. It replaces +:ref:`skiboot-5.10.3` as the current stable release in the 5.10.x series. + +It is recommended that 5.10.3 be used instead of any previous 5.10.x version +due to the bug fixes and debugging enhancements in it. + +Over :ref:`skiboot-5.10.3`, we have one bug fix: + +- xive: disable store EOI support + + Hardware has limitations which would require to put a sync after each + store EOI to make sure the MMIO operations that change the ESB state + are ordered. This is a killer for performance and the PHBs do not + support the sync. So remove the store EOI for the moment, until + hardware is improved. + + Also, while we are at changing the XIVE source flags, let's fix the + settings for the PHB4s which should follow these rules : + + - SHIFT_BUG for DD10 + - STORE_EOI for DD20 and if enabled + - TRIGGER_PAGE for DDx0 and if not STORE_EOI |