函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\kernel\acpi\cstate.c Create Date:2022-07-27 09:17:48
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：acpi_processor_ffh_cstate_probe

函数原型：int acpi_processor_ffh_cstate_probe(unsigned int cpu, struct acpi_processor_cx *cx, struct acpi_power_register *reg)

返回类型：int

参数：

类型参数名称
unsigned intcpu
struct acpi_processor_cx *cx
struct acpi_power_register *reg
149  c等于cpu_data(cpu)
152  如果非per CPU ptr 或Maximum supported CPUID level, -1=no CPUID: 小于CPUID_MWAIT_LEAF则返回:负1
155  如果bit_offset不等于NATIVE_CSTATE_BEYOND_HALT则返回:负1
158  percpu_entry等于per_cpu_ptr(per CPU ptr , cpu)
159  eax等于0
160  ecx等于0
164  retval等于work_on_cpu(cpu, acpi_processor_ffh_cstate_probe_cpu, cx)
165  如果retval恒等于0则
167  eax等于address
168  ecx等于MWAIT_ECX_INTERRUPT_BREAK
176  如果CPU vendor 恒等于X86_VENDOR_INTEL且非access_size按位与0x2的值则bm_sts_skip等于1
179  返回:retval