[PATCH v2 3/7] u-boot: Dynamic RISC-V ISA configuration

Mark Hatle
2025-06-17T23:39:57Z

Allow the risc-v TUNE_FEATURES to select specific ISA (kconfig) selections
via config fragments.

This allows the following items to be selected dynamically:

CONFIG_RISCV_ISA_C
CONFIG_RISCV_ISA_F
CONFIG_RISCV_ISA_D
CONFIG_RISCV_ISA_ZBB
CONFIG_RISCV_ISA_A
CONFIG_RISCV_ISA_ZICBOM

Signed-off-by: Mark Hatle <mark.hatle@amd.com>
---
meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_a.cfg | 1 +
meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_c.cfg | 1 +
.../u-boot/files/u-boot-riscv-isa_clear.cfg | 6 ++++++
meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_d.cfg | 1 +
meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_f.cfg | 1 +
.../u-boot/files/u-boot-riscv-isa_zbb.cfg | 1 +
.../u-boot/files/u-boot-riscv-isa_zicbom.cfg | 1 +
meta/recipes-bsp/u-boot/u-boot-common.inc | 12 ++++++++++++
8 files changed, 24 insertions(+)
create mode 100644 meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_a.cfg
create mode 100644 meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_c.cfg
create mode 100644 meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_clear.cfg
create mode 100644 meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_d.cfg
create mode 100644 meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_f.cfg
create mode 100644 meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_zbb.cfg
create mode 100644 meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_zicbom.cfg

diff --git a/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_a.cfg b/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_a.cfg
new file mode 100644
index 0000000000..fc45b64480
--- /dev/null
+++ b/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_a.cfg
@@ -0,0 +1 @@
+CONFIG_RISCV_ISA_A=y
diff --git a/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_c.cfg b/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_c.cfg
new file mode 100644
index 0000000000..1cb459f636
--- /dev/null
+++ b/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_c.cfg
@@ -0,0 +1 @@
+CONFIG_RISCV_ISA_C=y
diff --git a/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_clear.cfg b/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_clear.cfg
new file mode 100644
index 0000000000..ce90da23ce
--- /dev/null
+++ b/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_clear.cfg
@@ -0,0 +1,6 @@
+# CONFIG_RISCV_ISA_C is not set
+# CONFIG_RISCV_ISA_F is not set
+# CONFIG_RISCV_ISA_D is not set
+# CONFIG_RISCV_ISA_ZBB is not set
+# CONFIG_RISCV_ISA_A is not set
+# CONFIG_RISCV_ISA_ZICBOM is not set
diff --git a/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_d.cfg b/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_d.cfg
new file mode 100644
index 0000000000..fd25fa4e89
--- /dev/null
+++ b/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_d.cfg
@@ -0,0 +1 @@
+CONFIG_RISCV_ISA_D=y
diff --git a/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_f.cfg b/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_f.cfg
new file mode 100644
index 0000000000..dfa9876f82
--- /dev/null
+++ b/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_f.cfg
@@ -0,0 +1 @@
+CONFIG_RISCV_ISA_F=y
diff --git a/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_zbb.cfg b/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_zbb.cfg
new file mode 100644
index 0000000000..2b71b016f8
--- /dev/null
+++ b/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_zbb.cfg
@@ -0,0 +1 @@
+CONFIG_RISCV_ISA_ZBB=y
diff --git a/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_zicbom.cfg b/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_zicbom.cfg
new file mode 100644
index 0000000000..96daf04b20
--- /dev/null
+++ b/meta/recipes-bsp/u-boot/files/u-boot-riscv-isa_zicbom.cfg
@@ -0,0 +1 @@
+CONFIG_RISCV_ISA_ZICBOM=y
diff --git a/meta/recipes-bsp/u-boot/u-boot-common.inc b/meta/recipes-bsp/u-boot/u-boot-common.inc
index fd1eab5cdd..515f18ba9c 100644
--- a/meta/recipes-bsp/u-boot/u-boot-common.inc
+++ b/meta/recipes-bsp/u-boot/u-boot-common.inc
@@ -16,6 +16,18 @@ SRCREV = "34820924edbc4ec7803eb89d9852f4b870fa760a"

SRC_URI = "git://source.denx.de/u-boot/u-boot.git;protocol=https;branch=master;tag=v${PV}"

+SRC_URI_RISCV = "\
+ file://u-boot-riscv-isa_clear.cfg \
+ ${@bb.utils.contains ("TUNE_FEATURES", "a", "file://u-boot-riscv-isa_a.cfg", "", d)} \
+ ${@bb.utils.contains ("TUNE_FEATURES", "f", "file://u-boot-riscv-isa_f.cfg", "", d)} \
+ ${@bb.utils.contains ("TUNE_FEATURES", "d", "file://u-boot-riscv-isa_d.cfg", "", d)} \
+ ${@bb.utils.contains_any("TUNE_FEATURES", "b zbb", "file://u-boot-riscv-isa_zbb.cfg", "", d)} \
+ ${@bb.utils.contains ("TUNE_FEATURES", "zicbom", "file://u-boot-riscv-isa_zicbom.cfg", "", d)} \
+ "
+
+SRC_URI:append:riscv32 = "${SRC_URI_RISCV}"
+SRC_URI:append:riscv64 = "${SRC_URI_RISCV}"
+
S = "${WORKDIR}/git"
B = "${WORKDIR}/build"

--
2.34.1