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91c15a9510
Since commit 5f954c34 ([S390] hibernation: fix lowcore handling)
the absolute zero lowcore is lost during suspend/resume.
For example, this leads to the problem that the re-IPL device
for kdump is no longer set after resume.
With this patch during suspend a buffer is allocated in the new PM
notifier "suspend_pm_cb" and then the absolute zero lowcore is saved
to that buffer. The resume code then copies back this buffer to
absolute zero and afterwards the PM notifier releases the memory.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
83 lines
2.9 KiB
C
83 lines
2.9 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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#include <asm/cputime.h>
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extern void *restart_stack;
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extern unsigned long suspend_zero_pages;
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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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void psw_idle(struct s390_idle_data *, unsigned long);
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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 addressing_exception(struct pt_regs *regs);
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void data_exception(struct pt_regs *regs);
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void default_trap_handler(struct pt_regs *regs);
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void divide_exception(struct pt_regs *regs);
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void execute_exception(struct pt_regs *regs);
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void hfp_divide_exception(struct pt_regs *regs);
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void hfp_overflow_exception(struct pt_regs *regs);
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void hfp_significance_exception(struct pt_regs *regs);
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void hfp_sqrt_exception(struct pt_regs *regs);
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void hfp_underflow_exception(struct pt_regs *regs);
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void illegal_op(struct pt_regs *regs);
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void operand_exception(struct pt_regs *regs);
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void overflow_exception(struct pt_regs *regs);
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void privileged_op(struct pt_regs *regs);
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void space_switch_exception(struct pt_regs *regs);
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void special_op_exception(struct pt_regs *regs);
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void specification_exception(struct pt_regs *regs);
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void transaction_exception(struct pt_regs *regs);
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void translation_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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void 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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struct ext_code;
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void do_extint(struct pt_regs *regs, struct ext_code, 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_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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