diff options
Diffstat (limited to 'arch/powerpc/kernel/machine_kexec.c')
| -rw-r--r-- | arch/powerpc/kernel/machine_kexec.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/machine_kexec.c b/arch/powerpc/kernel/machine_kexec.c index 4f797c0b7148..b3abebb7ee64 100644 --- a/arch/powerpc/kernel/machine_kexec.c +++ b/arch/powerpc/kernel/machine_kexec.c @@ -120,6 +120,7 @@ int overlaps_crashkernel(unsigned long start, unsigned long size) /* Values we need to export to the second kernel via the device tree. */ static unsigned long kernel_end; +static unsigned long crashk_size; static struct property kernel_end_prop = { .name = "linux,kernel-end", @@ -127,6 +128,39 @@ static struct property kernel_end_prop = { .value = &kernel_end, }; +static struct property crashk_base_prop = { + .name = "linux,crashkernel-base", + .length = sizeof(unsigned long), + .value = &crashk_res.start, +}; + +static struct property crashk_size_prop = { + .name = "linux,crashkernel-size", + .length = sizeof(unsigned long), + .value = &crashk_size, +}; + +static void __init export_crashk_values(struct device_node *node) +{ + struct property *prop; + + /* There might be existing crash kernel properties, but we can't + * be sure what's in them, so remove them. */ + prop = of_find_property(node, "linux,crashkernel-base", NULL); + if (prop) + prom_remove_property(node, prop); + + prop = of_find_property(node, "linux,crashkernel-size", NULL); + if (prop) + prom_remove_property(node, prop); + + if (crashk_res.start != 0) { + prom_add_property(node, &crashk_base_prop); + crashk_size = crashk_res.end - crashk_res.start + 1; + prom_add_property(node, &crashk_size_prop); + } +} + static int __init kexec_setup(void) { struct device_node *node; @@ -145,6 +179,8 @@ static int __init kexec_setup(void) kernel_end = __pa(_end); prom_add_property(node, &kernel_end_prop); + export_crashk_values(node); + of_node_put(node); return 0; } |
