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s390/kexec_file: Add image loader

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Add an image loader for kexec_file_load. For simplicity first skip crash
support. The functions defined in machine_kexec_file will later be shared
with the ELF loader.

Signed-off-by: Philipp Rudo <prudo@linux.vnet.ibm.com>
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Philipp Rudo
2017-08-30 14:03:38 +02:00
committed by Martin Schwidefsky
parent 71406883fd
commit e49bb0a27f
4 changed files with 176 additions and 1 deletions
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22
arch/s390/include/asm/kexec.h
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@@ -46,4 +46,26 @@
static inline void crash_setup_regs(struct pt_regs *newregs,
struct pt_regs *oldregs) { }
struct kimage;
struct s390_load_data {
/* Pointer to the kernel buffer. Used to register cmdline etc.. */
void *kernel_buf;
/* Total size of loaded segments in memory. Used as an offset. */
size_t memsz;
/* Load address of initrd. Used to register INITRD_START in kernel. */
unsigned long initrd_load_addr;
};
int kexec_file_add_purgatory(struct kimage *image,
struct s390_load_data *data);
int kexec_file_add_initrd(struct kimage *image,
struct s390_load_data *data,
char *initrd, unsigned long initrd_len);
int *kexec_file_update_kernel(struct kimage *iamge,
struct s390_load_data *data);
extern const struct kexec_file_ops s390_kexec_image_ops;
#endif /*_S390_KEXEC_H */