loongson3_cpufreq 驱动加载失败 #7
Description
分支：loongarch-next
加载驱动时输出：
insmod: ERROR: could not insert module drivers/cpufreq/loongson3_cpufreq.ko: Operation not permitted
出错位置：
static int configure_cpufreq_info(void)
{
int ret;
union smc_message msg;
msg.cmd = CMD_GET_VERSION;
msg.extra = 0;
msg.complete = 0;
ret = do_service_request(&msg);
if (ret < 0 || msg.val < 0x1)
return -EPERM;
......
此处 msg.val 返回值为0
假如注释该处，则出错位置如下：
......
ret = cpufreq_register_driver(&loongson3_cpufreq_driver);
if (ret)
goto err;
......
此处 ret 返回值为-19
固件中的 DVFS 功能是开启的。
固件版本与相关信息如下：
# dmidecode 3.6
Getting SMBIOS data from sysfs.
SMBIOS 3.2.0 present.
Table at 0xFE3B0000.
Handle 0x0000, DMI type 0, 26 bytes
BIOS Information
Vendor: Loongson
Version: Loongson-UDK2018-V4.0.05132-beta10
Release Date: 07/26/2023
ROM Size: 4 MB
Characteristics:
PCI is supported
BIOS is upgradeable
Boot from CD is supported
Selectable boot is supported
BIOS ROM is socketed
Serial services are supported (int 14h)
USB legacy is supported
UEFI is supported
BIOS Revision: 4.0
Handle 0x0001, DMI type 1, 27 bytes
System Information
Manufacturer: Loongson
Product Name: Loongson-3A5000M-7A1000-Laptop-Eascs-L71
Version: Not Specified
Serial Number: Not Specified
UUID: Not Present
Wake-up Type: Power Switch
SKU Number: Not Specified
Family: Not Specified
......