News: 0001538861

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RISC-V With Linux 6.15 Adds Support For BFloat16 "BF16" Instructions

([RISC-V] 2 Hours Ago Linux 6.15 RISC-V)


Merged on Friday for the nearly-over [1]Linux 6.15 merge window were the RISC-V CPU architecture updates for this next kernel release.

RISC-V with Linux 6.15 brings build improvements thanks to a re-architecting of the Kconfig build system options around RISC-V for selecting sub-architecture features.

For the Linux 6.15 kernel with RISC-V there is also support for building relocatable non-MMU kernels, support for huge PFNMAPS to improve TLB utilization, support for runtime constants, new RISC-V instructions supported, and a variety of fixes.

RISC-V in this next Linux kernel version adds support for a number of newer instructions including bfloat16, Zicbom, Zaamo, Zalrsc, Zicntr, and Zihpm. Yes, RISC-V is finally ready to go with its BFloat16 precision floating-point ISA support. The BF16 extensions were ratified for the RISC-V spec and now prepped for the necessary Linux kernel bits.

The full list of RISC-V architecture changes for the Linux 6.15 merge window can be found via [2]this pull .



[1] https://www.phoronix.com/search/Linux+6.15

[2] https://lore.kernel.org/lkml/mhng-e4523e07-f5ae-4f8b-9eec-8422b05700f4@palmer-ri-x1c9/



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ayumu

... Another writer again agreed with all my generalities, but said that as an
inveterate skeptic I have closed my mind to the truth. Most notably I have
ignored the evidence for an Earth that is six thousand years old. Well, I
haven't ignored it; I considered the purported evidence and *then* rejected
it. There is a difference, and this is a difference, we might say, between
prejudice and postjudice. Prejudice is making a judgment before you have
looked at the facts. Postjudice is making a judgment afterwards. Prejudice
is terrible, in the sense that you commit injustices and you make serious
mistakes. Postjudice is not terrible. You can't be perfect of course; you
may make mistakes also. But it is permissible to make a judgment after you
have examined the evidence. In some circles it is even encouraged.
-- Carl Sagan, "The Burden of Skepticism"