1 files changed, 65 insertions, 0 deletions
diff --git a/arch/s390/kernel/kexec_image.c b/arch/s390/kernel/kexec_image.c
new file mode 100644
index 000000000..af23eff57
--- /dev/null
+++ b/arch/s390/kernel/kexec_image.c
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Image loader for kexec_file_load system call.
+ *
+ * Copyright IBM Corp. 2018
+ *
+ * Author(s): Philipp Rudo <prudo@linux.vnet.ibm.com>
+ */
+
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/kexec.h>
+#include <asm/ipl.h>
+#include <asm/setup.h>
+
+static int kexec_file_add_kernel_image(struct kimage *image,
+				       struct s390_load_data *data)
+{
+	struct kexec_buf buf;
+
+	buf.image = image;
+
+	buf.buffer = image->kernel_buf;
+	buf.bufsz = image->kernel_buf_len;
+
+	buf.mem = 0;
+	if (image->type == KEXEC_TYPE_CRASH)
+		buf.mem += crashk_res.start;
+	buf.memsz = buf.bufsz;
+
+	data->kernel_buf = image->kernel_buf;
+	data->kernel_mem = buf.mem;
+	data->parm = image->kernel_buf + PARMAREA;
+	data->memsz += buf.memsz;
+
+	ipl_report_add_component(data->report, &buf,
+				 IPL_RB_COMPONENT_FLAG_SIGNED |
+				 IPL_RB_COMPONENT_FLAG_VERIFIED,
+				 IPL_RB_CERT_UNKNOWN);
+	return kexec_add_buffer(&buf);
+}
+
+static void *s390_image_load(struct kimage *image,
+			     char *kernel, unsigned long kernel_len,
+			     char *initrd, unsigned long initrd_len,
+			     char *cmdline, unsigned long cmdline_len)
+{
+	return kexec_file_add_components(image, kexec_file_add_kernel_image);
+}
+
+static int s390_image_probe(const char *buf, unsigned long len)
+{
+	/* Can't reliably tell if an image is valid.  Therefore give the
+	 * user whatever he wants.
+	 */
+	return 0;
+}
+
+const struct kexec_file_ops s390_kexec_image_ops = {
+	.probe = s390_image_probe,
+	.load = s390_image_load,
+#ifdef CONFIG_KEXEC_SIG
+	.verify_sig = s390_verify_sig,
+#endif /* CONFIG_KEXEC_SIG */
+};