8b646bd759
Define struct pcpu and merge some of the NR_CPUS arrays into it, including __cpu_logical_map, current_set and smp_cpu_state. Split smp related functions to those operating on physical cpus and the functions operating on a logical cpu number. Make the functions for physical cpus use a pointer to a struct pcpu. This hides the knowledge about cpu addresses in smp.c, entry[64].S and swsusp_asm64.S, thus remove the sigp.h header. The PSW restart mechanism is used to start secondary cpus, calling a function on an online cpu, calling a function on the ipl cpu, and for the nmi signal. Replace the different assembler functions with a single function restart_int_handler. The new entry point calls a function whose pointer is stored in the lowcore of the target cpu and it can wait for the source cpu to stop. This covers all existing use cases. Overall the code is now simpler and there are ~380 lines less code. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
#ifndef _ENTRY_H
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#define _ENTRY_H
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#include <linux/types.h>
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#include <linux/signal.h>
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#include <asm/ptrace.h>
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extern void (*pgm_check_table[128])(struct pt_regs *);
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extern void *restart_stack;
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void system_call(void);
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void pgm_check_handler(void);
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void ext_int_handler(void);
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void io_int_handler(void);
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void mcck_int_handler(void);
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void restart_int_handler(void);
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void restart_call_handler(void);
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asmlinkage long do_syscall_trace_enter(struct pt_regs *regs);
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asmlinkage void do_syscall_trace_exit(struct pt_regs *regs);
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void do_protection_exception(struct pt_regs *regs);
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void do_dat_exception(struct pt_regs *regs);
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void do_asce_exception(struct pt_regs *regs);
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void do_per_trap(struct pt_regs *regs);
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void syscall_trace(struct pt_regs *regs, int entryexit);
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void kernel_stack_overflow(struct pt_regs * regs);
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void do_signal(struct pt_regs *regs);
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int handle_signal32(unsigned long sig, struct k_sigaction *ka,
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siginfo_t *info, sigset_t *oldset, struct pt_regs *regs);
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void do_notify_resume(struct pt_regs *regs);
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void do_extint(struct pt_regs *regs, unsigned int, unsigned int, unsigned long);
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void do_restart(void);
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void __init startup_init(void);
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void die(struct pt_regs *regs, const char *str);
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void __init time_init(void);
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struct s390_mmap_arg_struct;
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struct fadvise64_64_args;
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struct old_sigaction;
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long sys_mmap2(struct s390_mmap_arg_struct __user *arg);
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long sys_s390_ipc(uint call, int first, unsigned long second,
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unsigned long third, void __user *ptr);
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long sys_s390_personality(unsigned int personality);
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long sys_s390_fadvise64(int fd, u32 offset_high, u32 offset_low,
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size_t len, int advice);
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long sys_s390_fadvise64_64(struct fadvise64_64_args __user *args);
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long sys_s390_fallocate(int fd, int mode, loff_t offset, u32 len_high,
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u32 len_low);
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long sys_fork(void);
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long sys_clone(unsigned long newsp, unsigned long clone_flags,
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int __user *parent_tidptr, int __user *child_tidptr);
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long sys_vfork(void);
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void execve_tail(void);
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long sys_execve(const char __user *name, const char __user *const __user *argv,
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const char __user *const __user *envp);
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long sys_sigsuspend(int history0, int history1, old_sigset_t mask);
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long sys_sigaction(int sig, const struct old_sigaction __user *act,
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struct old_sigaction __user *oact);
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long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss);
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long sys_sigreturn(void);
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long sys_rt_sigreturn(void);
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long sys32_sigreturn(void);
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long sys32_rt_sigreturn(void);
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#endif /* _ENTRY_H */
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