On 9/14/23 12:10 PM, Anand Balagopalakrishnan via lists.yoctoproject.org wrote:
SGX needs a preemptible kernel. CONFIG_PREEMPT has always been enabled
on TI Linux kernels upto K5.1.
This is enabled on AM65x by default but missed out AM335x and AM437x.
Add a kernel config fragment to enable config preempt.
Signed-off-by: Anand Balagopalakrishnan <[email protected]>
---
Do not add configs to Yocto, add them to the kernel as normal patches using LPR
like everyone else.
Andrew
.../linux/files/configs/config-preempt.cfg | 12 ++++++++++++
.../recipes-kernel/linux/linux-ti-staging_6.1.bb | 1 +
2 files changed, 13 insertions(+)
create mode 100644
meta-ti-bsp/recipes-kernel/linux/files/configs/config-preempt.cfg
diff --git a/meta-ti-bsp/recipes-kernel/linux/files/configs/config-preempt.cfg
b/meta-ti-bsp/recipes-kernel/linux/files/configs/config-preempt.cfg
new file mode 100644
index 00000000..c1e5ad7d
--- /dev/null
+++ b/meta-ti-bsp/recipes-kernel/linux/files/configs/config-preempt.cfg
@@ -0,0 +1,12 @@
+CONFIG_PREEMPT_BUILD=y
+# CONFIG_PREEMPT_NONE is not set
+CONFIG_PREEMPT=y
+CONFIG_PREEMPT_COUNT=y
+CONFIG_PREEMPTION=y
+CONFIG_PREEMPT_RCU=y
+CONFIG_TASKS_RCU_GENERIC=y
+CONFIG_TASKS_RCU=y
+CONFIG_UNINLINE_SPIN_UNLOCK=y
+# CONFIG_CEC_GPIO is not set
+CONFIG_DEBUG_PREEMPT=y
+# CONFIG_PREEMPT_TRACER is not set
diff --git a/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging_6.1.bb
b/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging_6.1.bb
index 8a883878..0ee63358 100644
--- a/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging_6.1.bb
+++ b/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging_6.1.bb
@@ -33,6 +33,7 @@ PR = "${MACHINE_KERNEL_PR}"
KERNEL_GIT_URI ?= "git://git.ti.com/git/ti-linux-kernel/ti-linux-kernel.git"
KERNEL_GIT_PROTOCOL = "https"
+KERNEL_CONFIG_FRAGMENTS += "${WORKDIR}/config-preempt.cfg"
SRC_URI +=
"${KERNEL_GIT_URI};protocol=${KERNEL_GIT_PROTOCOL};branch=${BRANCH} \
file://defconfig"
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