61 lines
2.4 KiB
ReStructuredText
61 lines
2.4 KiB
ReStructuredText
.. _skiboot-5.10.5:
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==============
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skiboot-5.10.5
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==============
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skiboot 5.10.5 was released on Tuesday April 24th, 2018. It replaces
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:ref:`skiboot-5.10.4` as the current stable release in the 5.10.x series.
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It is recommended that 5.10.5 be used instead of any previous 5.10.x version
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due to the bug fixes and debugging enhancements in it.
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Over :ref:`skiboot-5.10.4`, we have four bug fixes:
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- npu2/hw-procedures: fence bricks on GPU reset
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The NPU workbook defines a way of fencing a brick and
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getting the brick out of fence state. We do have an implementation
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of bringing the brick out of fenced/quiesced state. We do
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the latter in our procedures, but to support run time reset
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we need to do the former.
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The fencing ensures that access to memory behind the links
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will not lead to HMI's, but instead SUE's will be populated
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in cache (in the case of speculation). The expectation is then
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that prior to and after reset, the operating system components
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will flush the cache for the region of memory behind the GPU.
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This patch does the following:
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1. Implements a npu2_dev_fence_brick() function to set/clear
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fence state
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2. Clear FIR bits prior to clearing the fence status
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3. Clear's the fence status
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4. We take the powerbus out of CQ fence much later now,
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in credits_check() which is the last hardware procedure
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called after link training.
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- hdata/spira: parse vpd to add part-number and serial-number to xscom@ node
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Expected by FWTS and associates our processor with the part/serial
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number, which is obviously a good thing for one's own sanity.
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- hw/imc: Check for pause_microcode_at_boot() return status
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pause_microcode_at_boot() loops through all the chip's ucode
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control block and pause the ucode if it is in the running state.
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But it does not fail if any of the chip's ucode is not initialised.
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Add code to return a failure if ucode is not initialized in any
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of the chip. Since pause_microcode_at_boot() is called just before
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attaching the IMC device nodes in imc_init(), add code to check for
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the function return.
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- core/cpufeatures: Fix setting DARN and SCV HWCAP feature bits
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DARN and SCV has been assigned AT_HWCAP2 (32-63) bits: ::
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#define PPC_FEATURE2_DARN 0x00200000 /* darn random number insn */
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#define PPC_FEATURE2_SCV 0x00100000 /* scv syscall */
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A cpufeatures-aware OS will not advertise these to userspace without
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this patch.
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