diff options
| author | Michael Holzheu <holzheu@linux.vnet.ibm.com> | 2012-03-11 16:59:34 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-03-11 16:59:29 +0100 |
| commit | 4857d4bbe9821c8d732cb84455e18e12b3d79add (patch) | |
| tree | 54583e3ef5c84c04f92b7b15ea6aad8224781d9b /arch/s390/kernel/smp.c | |
| parent | [S390] Use block_sigmask() (diff) | |
| download | linux-4857d4bbe9821c8d732cb84455e18e12b3d79add.tar.xz linux-4857d4bbe9821c8d732cb84455e18e12b3d79add.zip | |
[S390] kernel: Add OS info memory interface
In order to allow kdump based stand-alone dump, some information
has to be passed from the old kernel to the new dump kernel. This
is done via a the struct "os_info" that contains the following fields:
* crashkernel base and size
* reipl block
* vmcoreinfo
* init function
A pointer to os_info is stored at a well known storage location
and the whole structure as well as all fields are secured with
checksums.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/smp.c')
| -rw-r--r-- | arch/s390/kernel/smp.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index d15b6c937088..3b9e5c9f4c0b 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -41,6 +41,7 @@ #include <asm/sclp.h> #include <asm/vdso.h> #include <asm/debug.h> +#include <asm/os_info.h> #include "entry.h" enum { @@ -826,6 +827,17 @@ void __noreturn cpu_die(void) #endif /* CONFIG_HOTPLUG_CPU */ +static void smp_call_os_info_init_fn(void) +{ + int (*init_fn)(void); + unsigned long size; + + init_fn = os_info_old_entry(OS_INFO_INIT_FN, &size); + if (!init_fn) + return; + init_fn(); +} + void __init smp_prepare_cpus(unsigned int max_cpus) { /* request the 0x1201 emergency signal external interrupt */ @@ -834,6 +846,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus) /* request the 0x1202 external call external interrupt */ if (register_external_interrupt(0x1202, do_ext_call_interrupt) != 0) panic("Couldn't request external interrupt 0x1202"); + smp_call_os_info_init_fn(); smp_detect_cpus(); } |