上述函数会创建新进程,在内核栈中预留pt_regs大小的空间,用来设置用户空间所需要的寄存器,新创建的进程被唤醒最终通过cpu_switch_to切换: //x0 是prev ,x1是next 任务 ENTRY(cpu_switch_to) mov x10, #THREAD_CPU_CONTEXT // 寄存器x10存放thread.cpu_context偏移 add x8, x0, x10 //x8上个进程描述符的...
5. thread_info的task成员指向task_struct结构体; 6. 进程切换只会发生在内核态,即进程切换只需要考虑内核态的寄存器上下文切换,见schedule->__schedule->switch_to->cpu_switch_to中,将当前的regs保存到current->thread->context,同时恢复nex taskt的regs; 7. 发生系统调用/异常时,需要保存用户态/内核态的寄存器...
schedule-->__schedule-->context_switch-->switch_to-->__switch_to<arch/arm64/kernel/process.c>494/*495 * Thread switching.496 */497__notrace_funcgraphstructtask_struct*__switch_to(structtask_struct*prev,498structtask_struct*next)499{500structtask_struct*last;501502fpsimd_thread_switch(next...
What CPU architecture are you using? arm64 (Apple Silicon) Linux only: what package format did you use to install Rancher Desktop? No response Windows User Only No response Actual Behavior When opening rancher-desktop it still requires to install Rosetta 2 ...
1: to user //切换用户进程需要切换内存 switch_mm_irqs_off(=switch_mm) arg:next __switch_mm check_and_switch_context cpu_switch_mm static inline void cpu_switch_mm(pgd_t *pgd, struct mm_struct *mm) { BUG_ON(pgd == swapper_pg_dir); ...
Bootloader 以 作分析,看 psci.c 里的 psci_call 实现函数,通过 fid 与 PSCI_CPU_OFF 和 PSCI_CPU_ON 相比,找出需要执行的动作:boot-wrapper-aarch64 1long psci_call(unsigned long fid, unsigned long arg1, unsigned long arg2) 2{ 3 switch (fid) { 4 case PSCI_CPU_OFF: 5 return psci_cpu_...
* On return, the CPU will be ready for the MMU to be turned on and * the TCR will have been set. */ bl __cpu_setup// initialise processor b __primary_switch SYM_CODE_END(primary_entry) 2.1 preserve_boot_args 功能:把bootloader传进来的x0 .. x3保存到boot_args数组中。
Bootloader以boot-wrapper-aarch64作分析,看 psci.c 里的 psci_call 实现函数,通过 fid 与 PSCI_CPU_OFF 和 PSCI_CPU_ON 相比,找出需要执行的动作: 代码语言:javascript 复制 1longpsci_call(unsigned long fid,unsigned long arg1,unsigned long arg2)2{3switch(fid){4casePSCI_CPU_OFF:5returnpsci_cpu_...
Bootloader 以 作分析,看 psci.c 里的 psci_call 实现函数,通过 fid 与 PSCI_CPU_OFF 和 PSCI_CPU_ON 相比,找出需要执行的动作:boot-wrapper-aarch64 1longpsci_call(unsigned long fid,unsigned long arg1,unsigned long arg2)2{3switch(fid){4casePSCI_CPU_OFF:5returnpsci_cpu_off();67casePSCI_CPU...
Bootloader部分以boot-wrapper-aarch64中的代码做示例,非主 CPU 会轮询检查 mbox(其地址等同cpu-release-addr)中的值,当其值为 0 的时候继续睡眠,否则就跳转到内核执行,代码如下所示: 1/** 2* Wait for an address to appear in mbox, and jump to it. ...