sh: convert kexec crash kernel management to LMB.
This migrates the crash kernel handling off of bootmem and over to LMB.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/kernel/machine_kexec.c b/arch/sh/kernel/machine_kexec.c
index 7672141..f0f049c 100644
--- a/arch/sh/kernel/machine_kexec.c
+++ b/arch/sh/kernel/machine_kexec.c
@@ -8,7 +8,6 @@
* This source code is licensed under the GNU General Public License,
* Version 2. See the file COPYING for more details.
*/
-
#include <linux/mm.h>
#include <linux/kexec.h>
#include <linux/delay.h>
@@ -16,6 +15,7 @@
#include <linux/numa.h>
#include <linux/ftrace.h>
#include <linux/suspend.h>
+#include <linux/lmb.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/mmu_context.h>
@@ -148,3 +148,52 @@
VMCOREINFO_LENGTH(node_data, MAX_NUMNODES);
#endif
}
+
+void __init reserve_crashkernel(void)
+{
+ unsigned long long crash_size, crash_base;
+ int ret;
+
+ /* this is necessary because of lmb_phys_mem_size() */
+ lmb_analyze();
+
+ ret = parse_crashkernel(boot_command_line, lmb_phys_mem_size(),
+ &crash_size, &crash_base);
+ if (ret == 0 && crash_size > 0) {
+ crashk_res.start = crash_base;
+ crashk_res.end = crash_base + crash_size - 1;
+ }
+
+ if (crashk_res.end == crashk_res.start)
+ goto disable;
+
+ crash_size = PAGE_ALIGN(crashk_res.end - crashk_res.start + 1);
+ if (!crashk_res.start) {
+ crashk_res.start = lmb_alloc(crash_size, PAGE_SIZE);
+ if (!crashk_res.start) {
+ pr_err("crashkernel allocation failed\n");
+ goto disable;
+ }
+ } else {
+ ret = lmb_reserve(crashk_res.start, crash_size);
+ if (unlikely(ret < 0)) {
+ pr_err("crashkernel reservation failed - "
+ "memory is in use\n");
+ goto disable;
+ }
+ }
+
+ pr_info("Reserving %ldMB of memory at %ldMB "
+ "for crashkernel (System RAM: %ldMB)\n",
+ (unsigned long)(crash_size >> 20),
+ (unsigned long)(crashk_res.start >> 20),
+ (unsigned long)(lmb_phys_mem_size() >> 20));
+
+ crashk_res.end = crashk_res.start + crash_size - 1;
+ insert_resource(&iomem_resource, &crashk_res);
+
+ return;
+
+disable:
+ crashk_res.start = crashk_res.end = 0;
+}