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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/arch/arm64/kernel/machine_kexec.c
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@@ -1,12 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * kexec for arm64
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  *
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  * Copyright (C) Linaro.
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  * Copyright (C) Huawei Futurewei Technologies.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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  */
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 #include <linux/interrupt.h>
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@@ -163,18 +160,6 @@
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 	kexec_image_info(kimage);
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-	pr_debug("%s:%d: control_code_page:        %p\n", __func__, __LINE__,
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-		kimage->control_code_page);
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-	pr_debug("%s:%d: reboot_code_buffer_phys:  %pa\n", __func__, __LINE__,
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-		&reboot_code_buffer_phys);
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-	pr_debug("%s:%d: reboot_code_buffer:       %p\n", __func__, __LINE__,
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-		reboot_code_buffer);
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-	pr_debug("%s:%d: relocate_new_kernel:      %p\n", __func__, __LINE__,
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-		arm64_relocate_new_kernel);
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-	pr_debug("%s:%d: relocate_new_kernel_size: 0x%lx(%lu) bytes\n",
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-		__func__, __LINE__, arm64_relocate_new_kernel_size,
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-		arm64_relocate_new_kernel_size);
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-
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 	/*
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 	 * Copy arm64_relocate_new_kernel to the reboot_code_buffer for use
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 	 * after the kernel is shut down.
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@@ -213,9 +198,17 @@
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 	 * uses physical addressing to relocate the new image to its final
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 	 * position and transfers control to the image entry point when the
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 	 * relocation is complete.
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+	 * In kexec case, kimage->start points to purgatory assuming that
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+	 * kernel entry and dtb address are embedded in purgatory by
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+	 * userspace (kexec-tools).
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+	 * In kexec_file case, the kernel starts directly without purgatory.
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 	 */
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-
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-	cpu_soft_restart(reboot_code_buffer_phys, kimage->head, kimage->start, 0);
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+	cpu_soft_restart(reboot_code_buffer_phys, kimage->head, kimage->start,
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+#ifdef CONFIG_KEXEC_FILE
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+						kimage->arch.dtb_mem);
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+#else
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+						0);
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+#endif
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 	BUG(); /* Should never get here. */
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 }
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@@ -314,7 +307,7 @@
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  * but does not hold any data of loaded kernel image.
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  *
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  * Note that all the pages in crash dump kernel memory have been initially
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- * marked as Reserved in kexec_reserve_crashkres_pages().
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+ * marked as Reserved as memory was allocated via memblock_reserve().
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  *
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  * In hibernation, the pages which are Reserved and yet "nosave" are excluded
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  * from the hibernation iamge. crash_is_nosave() does thich check for crash
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@@ -354,7 +347,6 @@
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 	for (addr = begin; addr < end; addr += PAGE_SIZE) {
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 		page = phys_to_page(addr);
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-		ClearPageReserved(page);
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 		free_reserved_page(page);
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 	}
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 }