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| author |   Michael Holzheu <holzheu@linux.vnet.ibm.com> | 2011-10-30 15:16:42 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2011-10-30 15:16:42 +0100 |
| commit | d38593f9387055566b782d00d38d9a347a96e7d9 (patch) | |
| tree | 7f617f84b8b176a399abc9d6672604a31706b3bf /arch/s390 | |
| parent | [S390] kdump: Initialize vmcoreinfo note at startup (diff) | |
| download | linux-dev-d38593f9387055566b782d00d38d9a347a96e7d9.tar.xz linux-dev-d38593f9387055566b782d00d38d9a347a96e7d9.zip | |
[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>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/lowcore.h | 10 | ||||
| -rw-r--r-- | arch/s390/kernel/setup.c | 10 |
2 files changed, 16 insertions, 4 deletions
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h index e85c911aabf0..4f990a5e5b59 100644 --- a/arch/s390/include/asm/lowcore.h +++ b/arch/s390/include/asm/lowcore.h @@ -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 */ diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index b5a30412b2e5..63c81de665ec 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -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(); |