Differential D54965

riscv: Enable the zifencei extension explicitly in -march
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Authored by jhb on Jan 30 2026, 3:06 PM.

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mhorne
jrtc27

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rG31b259049e2b: riscv: Enable the zifencei extension explicitly in -march

Summary

clang is more tolerant and implies this extension whereas GCC is
stricter and requires it to be included.

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Repository

rG FreeBSD src repository

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Event Timeline

jhb created this revision.Jan 30 2026, 3:06 PM

Herald added a subscriber: imp. · View Herald TranscriptJan 30 2026, 3:06 PM

jhb requested review of this revision.Jan 30 2026, 3:06 PM

Harbormaster completed remote builds in B70236: Diff 170778.Jan 30 2026, 3:06 PM

jhb added a parent revision: D54964: sdt: Use the "cc" operand modifier for the address of probes for GCC 15+.Jan 30 2026, 3:06 PM

jhb added a child revision: D54966: riscv: Don't use the '#' modifier with '%b'.

Need to verify this also builds with clang. Jess believes that clang 17 and later will accept this.

mhorne accepted this revision.Jan 30 2026, 4:56 PM

This revision is now accepted and ready to land.Jan 30 2026, 4:56 PM

Closed by commit rG31b259049e2b: riscv: Enable the zifencei extension explicitly in -march (authored by jhb). · Explain WhyJan 31 2026, 5:21 PM

This revision was automatically updated to reflect the committed changes.

jhb added a commit: rG31b259049e2b: riscv: Enable the zifencei extension explicitly in -march.

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sys/

conf/

2 lines

Diff 170878

sys/conf/kern.mk

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