On Wed, Mar 8, 2017 at 2:47 PM, Huacai Chen <chenhc@xxxxxxxxxx> wrote:
> Maybe your Loongson-3A1000 has some hw problems.:)
Maybe so. I just run it with Debian's official kernel (4.9) without this patch,
It also hang with this problem.
While 4.7 seems working better.
>
> Huacai
>
> On Tue, Mar 7, 2017 at 9:38 PM, YunQiang Su <wzssyqa@xxxxxxxxx> wrote:
>> 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
>>
--
YunQiang Su
