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Latest in Linux 5.8: NVIDIA/Nouveau Changes, L1d and POWER10

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  • Open-Source NVIDIA/Nouveau Changes Submitted For Linux 5.8

    There hasn't been too much to report on the open-source NVIDIA "Nouveau" kernel driver in some time since the enabling of Turing and no apparent progress on re-clocking to allow the graphics cards to hit their rated clock frequencies (the longstanding, number one limitation for this open-source driver), but some changes were sent in today for the upcoming Linux 5.8 kernel merge window.

  • Linux 5.8 Set To Optionally Flush The L1d Cache On Context Switch To Increase Security

    The Linux kernel patches that have been spearheaded by Amazon AWS engineers to optionally flush the L1 data cache on each context switch have now been queued in the x86/mm branch ahead of the upcoming Linux 5.8 kernel cycle.

    This L1d cache flushing on context switches is being done in light of the various CPU security issues that have come to light in recent times and acknowledging there are likely other yet to be discovered vulnerabilities. Flushing the L1d cache on context switches helps fend off data from being snooped or leaked via side channels.

  • Linux 5.8 To See Support For POWER10's Prefixed Instructions

    Beyond the usual excitement of numerous x86 and Arm hardware advancements each cycle, Linux 5.8 is bringing new IBM POWER enablement work.

    Recently there has been an uptick in open-source/Linux enablement work for the forthcoming POWER10 and that holds true for Linux 5.8. There has been a patch series going around recently for introducing prefixed instruction support on the POWER front for a "future revision of the ISA." That work is now ready and queued ahead of the Linux 5.8 cycle opening up in early June.

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