02af87a742
The patch replaces internal registers dump implementation with ppc_save_regs(). From now on PPC64 and PPC32 are using the same code for crash_setup_regs(). NOTE: The old regs dump implementation was capturing SP (r1) directly as is, so you could see crash_kexec() function on top of the back-trace. But ppc_save_regs() goes up one stack frame, so you'll not see it anymore, at the top-level you'll see who actually triggered the crash dump instead. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
102 lines
2.7 KiB
C
102 lines
2.7 KiB
C
#ifndef _ASM_POWERPC_KEXEC_H
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#define _ASM_POWERPC_KEXEC_H
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#ifdef __KERNEL__
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/*
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* Maximum page that is mapped directly into kernel memory.
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* XXX: Since we copy virt we can use any page we allocate
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*/
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#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
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/*
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* Maximum address we can reach in physical address mode.
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* XXX: I want to allow initrd in highmem. Otherwise set to rmo on LPAR.
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*/
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#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
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/* Maximum address we can use for the control code buffer */
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#ifdef __powerpc64__
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#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
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#else
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/* TASK_SIZE, probably left over from use_mm ?? */
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#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
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#endif
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#define KEXEC_CONTROL_PAGE_SIZE 4096
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/* The native architecture */
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#ifdef __powerpc64__
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#define KEXEC_ARCH KEXEC_ARCH_PPC64
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#else
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#define KEXEC_ARCH KEXEC_ARCH_PPC
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#endif
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#ifndef __ASSEMBLY__
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#include <linux/cpumask.h>
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#include <asm/reg.h>
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typedef void (*crash_shutdown_t)(void);
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#ifdef CONFIG_KEXEC
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/*
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* This function is responsible for capturing register states if coming
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* via panic or invoking dump using sysrq-trigger.
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*/
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static inline void crash_setup_regs(struct pt_regs *newregs,
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struct pt_regs *oldregs)
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{
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if (oldregs)
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memcpy(newregs, oldregs, sizeof(*newregs));
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else
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ppc_save_regs(newregs);
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}
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extern void kexec_smp_wait(void); /* get and clear naca physid, wait for
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master to copy new code to 0 */
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extern int crashing_cpu;
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extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *));
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extern cpumask_t cpus_in_sr;
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static inline int kexec_sr_activated(int cpu)
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{
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return cpu_isset(cpu,cpus_in_sr);
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}
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struct kimage;
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struct pt_regs;
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extern void default_machine_kexec(struct kimage *image);
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extern int default_machine_kexec_prepare(struct kimage *image);
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extern void default_machine_crash_shutdown(struct pt_regs *regs);
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extern int crash_shutdown_register(crash_shutdown_t handler);
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extern int crash_shutdown_unregister(crash_shutdown_t handler);
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extern void machine_kexec_simple(struct kimage *image);
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extern void crash_kexec_secondary(struct pt_regs *regs);
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extern int overlaps_crashkernel(unsigned long start, unsigned long size);
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extern void reserve_crashkernel(void);
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#else /* !CONFIG_KEXEC */
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static inline int kexec_sr_activated(int cpu) { return 0; }
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static inline void crash_kexec_secondary(struct pt_regs *regs) { }
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static inline int overlaps_crashkernel(unsigned long start, unsigned long size)
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{
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return 0;
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}
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static inline void reserve_crashkernel(void) { ; }
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static inline int crash_shutdown_register(crash_shutdown_t handler)
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{
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return 0;
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}
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static inline int crash_shutdown_unregister(crash_shutdown_t handler)
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{
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return 0;
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}
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#endif /* CONFIG_KEXEC */
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#endif /* ! __ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_KEXEC_H */
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