From 84b3e81829b64a2385866aa39b697a6b2fc72b36 Mon Sep 17 00:00:00 2001 From: Stewart Smith Date: Fri, 4 Dec 2015 15:45:07 +1100 Subject: Add skiboot-5.1.12 release notes Signed-off-by: Stewart Smith --- doc/release-notes/skiboot-5.1.12.txt | 44 ++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 doc/release-notes/skiboot-5.1.12.txt diff --git a/doc/release-notes/skiboot-5.1.12.txt b/doc/release-notes/skiboot-5.1.12.txt new file mode 100644 index 0000000..6368473 --- /dev/null +++ b/doc/release-notes/skiboot-5.1.12.txt @@ -0,0 +1,44 @@ +skiboot-5.1.12 +-------------- + +skiboot-5.1.12 was released on Friday December 4th, 2015. + +skiboot-5.1.12 is the 13th stable release of 5.1, it follows skiboot-5.1.11 +(which was released November 13th, 2015). + +Skiboot 5.1.12 contains bug fixes and a performance improvement. + +opal-prd: +- Display an explict and obvious message if running on a system that does + not support opal-prd, such as an IBM FSP based POWER system, where the + FSP takes on the role of opal-prd. + +pflash: +- Fix a missing (C) header + - cherry-picked from master. + +General: +- Don't link with libgcc + - On some toolchains, we don't have libgcc available. + +POWER8 PHB (PCIe) specific: +- hw/phb3: Flush cache line after updating P/Q bits + When doing an MSI EOI, we update the P and Q bits in the IVE. That causes + the corresponding cache line to be dirty in the L3 which will cause a + subsequent update by the PHB (upon recieving the next MSI) to get a few + retries until it gets flushed. + + We improve the situation (and thus performance) by doing a dcbf + instruction to force a flush of the update we do in SW. + + This improves interrupt performance, reducing latency per interrupt. + The improvement will vary by workload. + +IBM FSP based machines: +- FSP: Give up PSI link on shutdown + This clears up some erroneous SRCs (error logs) in some situations. +- Correctly report back Real Time Clock errors to host + Under certain rare error conditions, we could return an error code + to the host OS that would cause current Linux kernels to get stuck + in an infinite loop during boot. + This was introduced in skiboot-5.0-rc1. -- cgit v1.1