With this patch, I met a problem on Loongson 3A 1000:
kernel: [1692。089996] NMI watchdog: BUG: soft lockup - CPU#0 stuck for
22s! [apt-get: 9687]
I will try to recomplie the kernel without this patch.
It seems that it works well on Loongson 3A 3000.
On Mon, Nov 14, 2016 at 11:12 AM, Huacai Chen <chenhc@xxxxxxxxxx> wrote:
> Signed-off-by: Huacai Chen <chenhc@xxxxxxxxxx>
> ---
> arch/mips/loongson64/common/init.c | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
> diff --git a/arch/mips/loongson64/common/init.c b/arch/mips/loongson64/common/init.c
> index 9b987fe..6ef1712 100644
> --- a/arch/mips/loongson64/common/init.c
> +++ b/arch/mips/loongson64/common/init.c
> @@ -10,13 +10,25 @@
>
> #include <linux/bootmem.h>
> #include <asm/bootinfo.h>
> +#include <asm/traps.h>
> #include <asm/smp-ops.h>
> +#include <asm/cacheflush.h>
>
> #include <loongson.h>
>
> /* Loongson CPU address windows config space base address */
> unsigned long __maybe_unused _loongson_addrwincfg_base;
>
> +static void __init mips_nmi_setup(void)
> +{
> + void *base;
> + extern char except_vec_nmi;
> +
> + base = (void *)(CAC_BASE + 0x380);
> + memcpy(base, &except_vec_nmi, 0x80);
> + flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
> +}
> +
> void __init prom_init(void)
> {
> #ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG
> @@ -40,6 +52,7 @@ void __init prom_init(void)
> /*init the uart base address */
> prom_init_uart_base();
> register_smp_ops(&loongson3_smp_ops);
> + board_nmi_handler_setup = mips_nmi_setup;
> }
>
> void __init prom_free_prom_memory(void)
> --
> 2.7.0
>
>
>
>
--
YunQiang Su
