55 lines
1.7 KiB
ReStructuredText
55 lines
1.7 KiB
ReStructuredText
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skiboot-5.1.12
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--------------
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skiboot-5.1.12 was released on Friday December 4th, 2015.
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skiboot-5.1.12 is the 13th stable release of 5.1, it follows skiboot-5.1.11
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(which was released November 13th, 2015).
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Skiboot 5.1.12 contains bug fixes and a performance improvement.
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opal-prd
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^^^^^^^^
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- Display an explict and obvious message if running on a system that does
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not support opal-prd, such as an IBM FSP based POWER system, where the
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FSP takes on the role of opal-prd.
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pflash
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^^^^^^
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- Fix a missing (C) header
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- cherry-picked from master.
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General
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^^^^^^^
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- Don't link with libgcc
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- On some toolchains, we don't have libgcc available.
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POWER8 PHB (PCIe) specific
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^^^^^^^^^^^^^^^^^^^^^^^^^^
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- hw/phb3: Flush cache line after updating P/Q bits
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When doing an MSI EOI, we update the P and Q bits in the IVE. That causes
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the corresponding cache line to be dirty in the L3 which will cause a
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subsequent update by the PHB (upon receiving the next MSI) to get a few
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retries until it gets flushed.
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We improve the situation (and thus performance) by doing a dcbf
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instruction to force a flush of the update we do in SW.
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This improves interrupt performance, reducing latency per interrupt.
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The improvement will vary by workload.
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IBM FSP based machines
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^^^^^^^^^^^^^^^^^^^^^^
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- FSP: Give up PSI link on shutdown
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This clears up some erroneous SRCs (error logs) in some situations.
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- Correctly report back Real Time Clock errors to host
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Under certain rare error conditions, we could return an error code
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to the host OS that would cause current Linux kernels to get stuck
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in an infinite loop during boot.
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This was introduced in skiboot-5.0-rc1.
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