diff options
Diffstat (limited to 'arch/powerpc/kernel/machine_kexec.c')
| -rw-r--r-- | arch/powerpc/kernel/machine_kexec.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/arch/powerpc/kernel/machine_kexec.c b/arch/powerpc/kernel/machine_kexec.c index 7ee50f0547c..9ce1672afb5 100644 --- a/arch/powerpc/kernel/machine_kexec.c +++ b/arch/powerpc/kernel/machine_kexec.c @@ -126,7 +126,7 @@ void __init reserve_crashkernel(void) /* We might have got these values via the command line or the * device tree, either way sanitise them now. */ - crash_size = crashk_res.end - crashk_res.start + 1; + crash_size = resource_size(&crashk_res); #ifndef CONFIG_RELOCATABLE if (crashk_res.start != KDUMP_KERNELBASE) @@ -136,12 +136,16 @@ void __init reserve_crashkernel(void) crashk_res.start = KDUMP_KERNELBASE; #else if (!crashk_res.start) { +#ifdef CONFIG_PPC64 /* - * unspecified address, choose a region of specified size - * can overlap with initrd (ignoring corruption when retained) - * ppc64 requires kernel and some stacks to be in first segemnt + * On 64bit we split the RMO in half but cap it at half of + * a small SLB (128MB) since the crash kernel needs to place + * itself and some stacks to be in the first segment. */ + crashk_res.start = min(0x80000000ULL, (ppc64_rma_size / 2)); +#else crashk_res.start = KDUMP_KERNELBASE; +#endif } crash_base = PAGE_ALIGN(crashk_res.start); @@ -222,7 +226,7 @@ static void __init export_crashk_values(struct device_node *node) if (crashk_res.start != 0) { prom_add_property(node, &crashk_base_prop); - crashk_size = crashk_res.end - crashk_res.start + 1; + crashk_size = resource_size(&crashk_res); prom_add_property(node, &crashk_size_prop); } } |