Messages in this thread Patch in this message | | | Date | Tue, 20 Sep 2011 16:34:02 +0200 | From | Michael Holzheu <> | Subject | [patch 2/2] s390: Export vmcoreinfo note |
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From: Michael Holzheu <holzheu@linux.vnet.ibm.com>
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> --- arch/s390/include/asm/lowcore.h | 3 ++- arch/s390/kernel/setup.c | 8 ++++++++ 2 files changed, 10 insertions(+), 1 deletion(-)
--- a/arch/s390/include/asm/lowcore.h +++ b/arch/s390/include/asm/lowcore.h @@ -287,7 +287,8 @@ struct _lowcore { */ __u64 ipib; /* 0x0e00 */ __u32 ipib_checksum; /* 0x0e08 */ - __u8 pad_0x0e0c[0x0f00-0x0e0c]; /* 0x0e0c */ + __u64 vmcore_info; /* 0x0e0c */ + __u8 pad_0x0e14[0x0f00-0x0e14]; /* 0x0e14 */ /* Extended facility list */ __u64 stfle_fac_list[32]; /* 0x0f00 */ --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -559,6 +559,13 @@ static void __init setup_restart_psw(voi copy_to_absolute_zero(&S390_lowcore.restart_psw, &psw, sizeof(psw)); } +static void __init setup_vmcoreinfo(void) +{ + unsigned long ptr = paddr_vmcoreinfo_note(); + + copy_to_absolute_zero(&S390_lowcore.vmcore_info, &ptr, sizeof(ptr)); +} + #ifdef CONFIG_CRASH_DUMP /* @@ -1019,6 +1026,7 @@ setup_arch(char **cmdline_p) reserve_crashkernel(); setup_memory(); setup_resources(); + setup_vmcoreinfo(); setup_restart_psw(); setup_lowcore();
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