Commit d38593f9 authored by Michael Holzheu's avatar Michael Holzheu Committed by Martin Schwidefsky
Browse files

[S390] Export vmcoreinfo note 



This patch defines for s390 an ABI defined pointer to the vmcoreinfo note at
a well known address. With this patch tools are able to find this information
in dumps created by stand-alone or hypervisor dump tools.

Signed-off-by: default avatarMichael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent fa8ff292

arch/s390/include/asm/lowcore.h

+6 −4
Original line number Diff line number Diff line
@@ -151,10 +151,11 @@ struct _lowcore { 
	 */

	__u32	ipib;				/* 0x0e00 */

	__u32	ipib_checksum;			/* 0x0e04 */

	__u32	vmcore_info;			/* 0x0e08 */



	/* 64 bit save area */

	__u64	save_area_64;			/* 0x0e08 */

	__u8	pad_0x0e10[0x0f00-0x0e10];	/* 0x0e10 */

	__u64	save_area_64;			/* 0x0e0c */

	__u8	pad_0x0e14[0x0f00-0x0e14];	/* 0x0e14 */



	/* Extended facility list */

	__u64	stfle_fac_list[32];		/* 0x0f00 */
@@ -290,10 +291,11 @@ struct _lowcore { 
	 */

	__u64	ipib;				/* 0x0e00 */

	__u32	ipib_checksum;			/* 0x0e08 */

	__u64	vmcore_info;			/* 0x0e0c */



	/* 64 bit save area */

	__u64	save_area_64;			/* 0x0e0c */

	__u8	pad_0x0e14[0x0f00-0x0e14];	/* 0x0e14 */

	__u64	save_area_64;			/* 0x0e14 */

	__u8	pad_0x0e1c[0x0f00-0x0e1c];	/* 0x0e1c */



	/* Extended facility list */

	__u64	stfle_fac_list[32];		/* 0x0f00 */

arch/s390/kernel/setup.c

+10 −0
Original line number Diff line number Diff line
@@ -558,6 +558,15 @@ static void __init setup_restart_psw(void) 
	copy_to_absolute_zero(&S390_lowcore.restart_psw, &psw, sizeof(psw));

}



static void __init setup_vmcoreinfo(void)

{

#ifdef CONFIG_KEXEC

	unsigned long ptr = paddr_vmcoreinfo_note();



	copy_to_absolute_zero(&S390_lowcore.vmcore_info, &ptr, sizeof(ptr));

#endif

}



#ifdef CONFIG_CRASH_DUMP



/*
@@ -1022,6 +1031,7 @@ setup_arch(char **cmdline_p) 
	reserve_crashkernel();

	setup_memory();

	setup_resources();

	setup_vmcoreinfo();

	setup_restart_psw();

	setup_lowcore();

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