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Commit d38593f9 authored Oct 30, 2011 by Michael Holzheu Committed by Martin Schwidefsky Oct 30, 2011

[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: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

parent fa8ff292

arch/s390/include/asm/lowcore.h

+6 −4

Original line number	Original line	Diff line number	Diff line
	@@ -151,10 +151,11 @@ struct _lowcore {
	*/		*/
	__u32 ipib; /* 0x0e00 */		__u32 ipib; /* 0x0e00 */
	__u32 ipib_checksum; /* 0x0e04 */		__u32 ipib_checksum; /* 0x0e04 */
			__u32 vmcore_info; /* 0x0e08 */

	/* 64 bit save area */		/* 64 bit save area */
	__u64 save_area_64; /* 0x0e08 */		__u64 save_area_64; /* 0x0e0c */
	__u8 pad_0x0e10[0x0f00-0x0e10]; /* 0x0e10 */		__u8 pad_0x0e14[0x0f00-0x0e14]; /* 0x0e14 */

	/* Extended facility list */		/* Extended facility list */
	__u64 stfle_fac_list[32]; /* 0x0f00 */		__u64 stfle_fac_list[32]; /* 0x0f00 */
	@@ -290,10 +291,11 @@ struct _lowcore {
	*/		*/
	__u64 ipib; /* 0x0e00 */		__u64 ipib; /* 0x0e00 */
	__u32 ipib_checksum; /* 0x0e08 */		__u32 ipib_checksum; /* 0x0e08 */
			__u64 vmcore_info; /* 0x0e0c */

	/* 64 bit save area */		/* 64 bit save area */
	__u64 save_area_64; /* 0x0e0c */		__u64 save_area_64; /* 0x0e14 */
	__u8 pad_0x0e14[0x0f00-0x0e14]; /* 0x0e14 */		__u8 pad_0x0e1c[0x0f00-0x0e1c]; /* 0x0e1c */

	/* Extended facility list */		/* Extended facility list */
	__u64 stfle_fac_list[32]; /* 0x0f00 */		__u64 stfle_fac_list[32]; /* 0x0f00 */

arch/s390/kernel/setup.c

+10 −0

Original line number	Original line	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));		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		#ifdef CONFIG_CRASH_DUMP

	/*		/*
	@@ -1022,6 +1031,7 @@ setup_arch(char **cmdline_p)
	reserve_crashkernel();		reserve_crashkernel();
	setup_memory();		setup_memory();
	setup_resources();		setup_resources();
			setup_vmcoreinfo();
	setup_restart_psw();		setup_restart_psw();
	setup_lowcore();		setup_lowcore();