[PATCH] riscv: Add machine name to kernel boot log and stack dump output
Kefeng Wang
wangkefeng.wang at huawei.com
Wed Nov 25 06:44:15 EST 2020
Add the machine name to kernel boot-up log, and install
the machine name to stack dump for DT boot mode.
Signed-off-by: Kefeng Wang <wangkefeng.wang at huawei.com>
---
Here is the message after patched,
root@(none):~# dmesg |grep "Machine model"
[ 0.000000] Machine model: riscv-virtio,qemu
root@(none):~# echo c > /proc/sysrq-trigger
[ 1519.475346] sysrq: Trigger a crash
[ 1519.476004] Kernel panic - not syncing: sysrq triggered crash
[ 1519.476480] CPU: 0 PID: 64 Comm: sh Not tainted 5.10.0-rc5 #246
[ 1519.476877] Hardware name: riscv-virtio,qemu (DT)
[ 1519.477169] Call Trace:
...
arch/riscv/kernel/setup.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index c424cc6dd833..901ac0c680dd 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -54,8 +54,15 @@ static DEFINE_PER_CPU(struct cpu, cpu_devices);
static void __init parse_dtb(void)
{
/* Early scan of device tree from init memory */
- if (early_init_dt_scan(dtb_early_va))
+ if (early_init_dt_scan(dtb_early_va)) {
+ const char *name = of_flat_dt_get_machine_name();
+
+ if (name) {
+ pr_info("Machine model: %s\n", name);
+ dump_stack_set_arch_desc("%s (DT)", name);
+ }
return;
+ }
pr_err("No DTB passed to the kernel\n");
#ifdef CONFIG_CMDLINE_FORCE
--
2.26.2
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