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linux-yocto/6.12: riscv: Enable TUNE_FEATURES based KERNEL_FEATURES

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Allow the risc-v TUNE_FEATURES to select specific ISA (kconfig) selections
in the kernel config via config fragments selected by KERNEL_FEATURES.

This allows the following items to be selected dynamically:

    CONFIG_ARCH_RV32I
    CONFIG_ARCH_RV64I
    CONFIG_FPU
    CONFIG_RISCV_ISA_C
    CONFIG_RISCV_ISA_V
    CONFIG_RISCV_ISA_ZBB
    CONFIG_RISCV_ISA_ZICBOM
    CONFIG_RISCV_ISA_ZICBOZ
    CONFIG_TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI

Note: Some ISA options, such as CONFIG_RISCV_ISA_C may be reenabled by other
options such as CONFIG_EFI.  This is properly reported by the configuration
tooling.

(From OE-Core rev: 45a1b5aa6abc9007d0d87efc2d740b5564a209dd)

Signed-off-by: Mark Hatle <mark.hatle@amd.com>
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Mark Hatle
2025-07-02 16:44:23 -05:00
committed by Richard Purdie
parent 348ef80f27
commit cd389a7461
1 changed files with 16 additions and 0 deletions
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16
meta/recipes-kernel/linux/linux-yocto.inc
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@@ -37,6 +37,22 @@ KERNEL_FEATURES:append = " ${@bb.utils.contains('MACHINE_FEATURES', 'efi', 'cfg/
KERNEL_FEATURES:append = " ${@bb.utils.contains('MACHINE_FEATURES', 'numa', 'features/numa/numa.scc', '', d)}"
KERNEL_FEATURES:append = " ${@bb.utils.contains('MACHINE_FEATURES', 'vfat', 'cfg/fs/vfat.scc', '', d)}"
KERNEL_FEATURES_RISCV = "\
arch/riscv/tunes/riscv-isa-clear.scc \
${@bb.utils.contains( 'TUNE_FEATURES', 'rv 32 i m a', 'arch/riscv/tunes/riscv-isa-rv32i.scc', '', d)} \
${@bb.utils.contains( 'TUNE_FEATURES', 'rv 64 i m a', 'arch/riscv/tunes/riscv-isa-rv64i.scc', '', d)} \
${@bb.utils.contains( 'TUNE_FEATURES', 'f d', 'arch/riscv/tunes/riscv-isa-fpu.scc', '', d)} \
${@bb.utils.contains( 'TUNE_FEATURES', 'c', 'arch/riscv/tunes/riscv-isa-c.scc', '', d)} \
${@bb.utils.contains( 'TUNE_FEATURES', 'v', 'arch/riscv/tunes/riscv-isa-v.scc', '', d)} \
${@bb.utils.contains_any('TUNE_FEATURES', 'b zba', 'arch/riscv/tunes/riscv-isa-zba.scc', '', d)} \
${@bb.utils.contains_any('TUNE_FEATURES', 'b zbb', 'arch/riscv/tunes/riscv-isa-zbb.scc', '', d)} \
${@bb.utils.contains( 'TUNE_FEATURES', 'zbc', 'arch/riscv/tunes/riscv-isa-zbc.scc', '', d)} \
${@bb.utils.contains( 'TUNE_FEATURES', 'zicbom', 'arch/riscv/tunes/riscv-isa-zicbom.scc', '', d)} \
"
KERNEL_FEATURES:append:riscv32 = " ${KERNEL_FEATURES_RISCV}"
KERNEL_FEATURES:append:riscv64 = " ${KERNEL_FEATURES_RISCV}"
# A KMACHINE is the mapping of a yocto $MACHINE to what is built
# by the kernel. This is typically the branch that should be built,
# and it can be specific to the machine or shared