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Commit 60a0c68d authored by Michael Holzheu's avatar Michael Holzheu Committed by Martin Schwidefsky
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[S390] kdump backend code 



This patch provides the architecture specific part of the s390 kdump
support.

Signed-off-by: default avatarMichael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 7f0bf656

arch/s390/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -569,6 +569,16 @@ config KEXEC 
	  current kernel, and to start another kernel.  It is like a reboot

	  but is independent of hardware/microcode support.



config CRASH_DUMP

	bool "kernel crash dumps"

	depends on 64BIT

	help

	  Generate crash dump after being started by kexec.

	  Crash dump kernels are loaded in the main kernel with kexec-tools

	  into a specially reserved region and then later executed after

	  a crash by kdump/kexec.

	  For more details see Documentation/kdump/kdump.txt



config ZFCPDUMP

	def_bool n

	prompt "zfcpdump support"

arch/s390/include/asm/ipl.h

+1 −0
Original line number Diff line number Diff line
@@ -168,5 +168,6 @@ enum diag308_rc { 


extern int diag308(unsigned long subcode, void *addr);

extern void diag308_reset(void);

extern void store_status(void);



#endif /* _ASM_S390_IPL_H */

arch/s390/include/asm/kexec.h

+3 −0
Original line number Diff line number Diff line
@@ -30,6 +30,9 @@ 
/* Not more than 2GB */

#define KEXEC_CONTROL_MEMORY_LIMIT (1UL<<31)



/* Maximum address we can use for the crash control pages */

#define KEXEC_CRASH_CONTROL_MEMORY_LIMIT (-1UL)



/* Allocate one page for the pdp and the second for the code */

#define KEXEC_CONTROL_PAGE_SIZE 4096

arch/s390/include/asm/reset.h

+1 −1
Original line number Diff line number Diff line
@@ -17,5 +17,5 @@ struct reset_call { 


extern void register_reset_call(struct reset_call *reset);

extern void unregister_reset_call(struct reset_call *reset);

extern void s390_reset_system(void);

extern void s390_reset_system(void (*func)(void *), void *data);

#endif /* _ASM_S390_RESET_H */

arch/s390/include/asm/setup.h

+13 −0
Original line number Diff line number Diff line
@@ -26,15 +26,21 @@ 
#define IPL_DEVICE        (*(unsigned long *)  (0x10404))

#define INITRD_START      (*(unsigned long *)  (0x1040C))

#define INITRD_SIZE       (*(unsigned long *)  (0x10414))

#define OLDMEM_BASE	  (*(unsigned long *)  (0x1041C))

#define OLDMEM_SIZE	  (*(unsigned long *)  (0x10424))

#else /* __s390x__ */

#define IPL_DEVICE        (*(unsigned long *)  (0x10400))

#define INITRD_START      (*(unsigned long *)  (0x10408))

#define INITRD_SIZE       (*(unsigned long *)  (0x10410))

#define OLDMEM_BASE	  (*(unsigned long *)  (0x10418))

#define OLDMEM_SIZE	  (*(unsigned long *)  (0x10420))

#endif /* __s390x__ */

#define COMMAND_LINE      ((char *)            (0x10480))



#define CHUNK_READ_WRITE 0

#define CHUNK_READ_ONLY  1

#define CHUNK_OLDMEM	 4

#define CHUNK_CRASHK	 5



struct mem_chunk {

	unsigned long addr;
@@ -48,6 +54,8 @@ extern int memory_end_set; 
extern unsigned long memory_end;



void detect_memory_layout(struct mem_chunk chunk[]);

void create_mem_hole(struct mem_chunk memory_chunk[], unsigned long addr,

		     unsigned long size, int type);



#define PRIMARY_SPACE_MODE	0

#define ACCESS_REGISTER_MODE	1
@@ -106,6 +114,7 @@ extern unsigned int user_mode; 
#endif /* __s390x__ */



#define ZFCPDUMP_HSA_SIZE	(32UL<<20)

#define ZFCPDUMP_HSA_SIZE_MAX	(64UL<<20)



/*

 * Console mode. Override with conmode=
@@ -134,10 +143,14 @@ extern char kernel_nss_name[]; 
#define IPL_DEVICE        0x10404

#define INITRD_START      0x1040C

#define INITRD_SIZE       0x10414

#define OLDMEM_BASE	  0x1041C

#define OLDMEM_SIZE	  0x10424

#else /* __s390x__ */

#define IPL_DEVICE        0x10400

#define INITRD_START      0x10408

#define INITRD_SIZE       0x10410

#define OLDMEM_BASE	  0x10418

#define OLDMEM_SIZE	  0x10420

#endif /* __s390x__ */

#define COMMAND_LINE      0x10480