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https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
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cc57165874
- In case of system crash, current state of cpu registers is saved in memory in elf note format. So far memory for storing elf notes was being allocated statically for NR_CPUS. - This patch introduces dynamic allocation of memory for storing elf notes. It uses alloc_percpu() interface. This should lead to better memory usage. - Introduced based on Andi Kleen's and Eric W. Biederman's suggestions. - This patch also moves memory allocation for elf notes from architecture dependent portion to architecture independent portion. Now crash_notes is architecture independent. The whole idea is that size of memory to be allocated per cpu (MAX_NOTE_BYTES) can be architecture dependent and allocation of this memory can be architecture independent. Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
60 lines
1.5 KiB
C
60 lines
1.5 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_CODE_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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#define HAVE_ARCH_COPY_OLDMEM_PAGE
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_KEXEC
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#define MAX_NOTE_BYTES 1024
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#ifdef __powerpc64__
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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 void __init kexec_setup(void);
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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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#endif /* __powerpc64 __ */
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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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#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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