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[RFC,14/14] tune-riscv.inc: append zifencei extension to profiles

Message ID 20260915190244.2983746-15-tgamblin@baylibre.com
State New
Headers show
Series riscv: add new ISA extensions and profile support | expand

Commit Message

Trevor Gamblin Sept. 15, 2026, 7:02 p.m. UTC 
Only riscv64gc enables this by default, but we need it for the Linux
Kernel. Append it to the official profile strings.

Signed-off-by: Trevor Gamblin <tgamblin@baylibre.com>
---
 meta/conf/machine/include/riscv/tune-riscv.inc | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
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Patch

diff --git a/meta/conf/machine/include/riscv/tune-riscv.inc b/meta/conf/machine/include/riscv/tune-riscv.inc
index 64d1f89dc6..9357dc67a0 100644
--- a/meta/conf/machine/include/riscv/tune-riscv.inc
+++ b/meta/conf/machine/include/riscv/tune-riscv.inc
@@ -4,13 +4,15 @@  DEFAULTTUNE ?= "riscv64gc"
 
 AVAILTUNES += "rva23u64 rva22u64 rva20u64 riscv64gcv riscv64gc riscv32gc riscv64nc riscv64nf riscv32nf"
 
-TUNE_FEATURES:tune-rva20u64 := "${@oe.tune.riscv_isa_to_tune("rva20u64")}"
+# zifencei isn't part of these profiles per gcc's -march expansion, but the
+# Linux kernel requires it, so add it on top of the profile's extensions.
+TUNE_FEATURES:tune-rva20u64 := "${@oe.tune.riscv_isa_to_tune("rva20u64")} zifencei"
 PACKAGE_EXTRA_ARCHS:tune-rva20u64 = "${TUNE_RISCV_PKGARCH}"
 
-TUNE_FEATURES:tune-rva22u64 := "${@oe.tune.riscv_isa_to_tune("rva22u64")}"
+TUNE_FEATURES:tune-rva22u64 := "${@oe.tune.riscv_isa_to_tune("rva22u64")} zifencei"
 PACKAGE_EXTRA_ARCHS:tune-rva22u64 = "${TUNE_RISCV_PKGARCH}"
 
-TUNE_FEATURES:tune-rva23u64 := "${@oe.tune.riscv_isa_to_tune("rva23u64")}"
+TUNE_FEATURES:tune-rva23u64 := "${@oe.tune.riscv_isa_to_tune("rva23u64")} zifencei"
 PACKAGE_EXTRA_ARCHS:tune-rva23u64 = "${TUNE_RISCV_PKGARCH}"
 
 # Default