Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 44 insertions, 0 deletions

diff --git a/arch/mips/generic/kexec.c b/arch/mips/generic/kexec.c
new file mode 100644
index 000000000..1ca409f58
--- /dev/null
+++ b/arch/mips/generic/kexec.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2016 Imagination Technologies
+ * Author: Marcin Nowakowski <marcin.nowakowski@mips.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/kexec.h>
+#include <linux/libfdt.h>
+#include <linux/uaccess.h>
+
+static int generic_kexec_prepare(struct kimage *image)
+{
+	int i;
+
+	for (i = 0; i < image->nr_segments; i++) {
+		struct fdt_header fdt;
+
+		if (image->segment[i].memsz <= sizeof(fdt))
+			continue;
+
+		if (copy_from_user(&fdt, image->segment[i].buf, sizeof(fdt)))
+			continue;
+
+		if (fdt_check_header(&fdt))
+			continue;
+
+		kexec_args[0] = -2;
+		kexec_args[1] = (unsigned long)
+			phys_to_virt((unsigned long)image->segment[i].mem);
+		break;
+	}
+	return 0;
+}
+
+static int __init register_generic_kexec(void)
+{
+	_machine_kexec_prepare = generic_kexec_prepare;
+	return 0;
+}
+arch_initcall(register_generic_kexec);