[PATCH] arm64/cpuinfo: Show right CPU architecture information

[乱石]

在 2021/1/19 19:01, Will Deacon 写道:
> On Tue, Jan 19, 2021 at 06:55:10PM +0800, Liguang Zhang wrote:
>> CPU architecture is assigned to be a fixed value, it should be obtained
>> from midr register.
>>
>> Signed-off-by: Liguang Zhang <zhangliguang at linux.alibaba.com>
>> ---
>>   arch/arm64/kernel/cpuinfo.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
>> index 77605aec25fe..0bd11e0fe9f2 100644
>> --- a/arch/arm64/kernel/cpuinfo.c
>> +++ b/arch/arm64/kernel/cpuinfo.c
>> @@ -191,7 +191,7 @@ static int c_show(struct seq_file *m, void *v)
>>   
>>   		seq_printf(m, "CPU implementer\t: 0x%02x\n",
>>   			   MIDR_IMPLEMENTOR(midr));
>> -		seq_printf(m, "CPU architecture: 8\n");
>> +		seq_printf(m, "CPU architecture: %d\n", MIDR_ARCHITECTURE(midr));
> Huh? Won't this always return 0xf?

Hi Will,

I'm not sure. My platform return 0xf, but /proc/cpuinfo show 8. Why we 
assign a fixed

value to cpu architecture?

Regards

Liguang Zhang

>
> Will