[xen staging] xen/riscv: register Xen's load address as a boot module

[patchbot@xxxxxxx]

commit 2b49ef4503e2c549c166f439cf0dd331d9a8874c
Author:     Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
AuthorDate: Thu Oct 10 10:55:24 2024 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Oct 10 10:55:24 2024 +0200

    xen/riscv: register Xen's load address as a boot module
    
    Avoid using BOOTMOD_XEN region for other purposes or boot modules
    which could result in memory corruption or undefined behaviour.
    
    Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/riscv/setup.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/xen/arch/riscv/setup.c b/xen/arch/riscv/setup.c
index 6d156c3a40..f531ca38ee 100644
--- a/xen/arch/riscv/setup.c
+++ b/xen/arch/riscv/setup.c
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <xen/bug.h>
+#include <xen/bootfdt.h>
 #include <xen/compile.h>
 #include <xen/device_tree.h>
 #include <xen/init.h>
@@ -44,6 +45,11 @@ void __init noreturn start_xen(unsigned long bootcpu_id,
               "Please check your bootloader.\n",
               dtb_addr, BOOT_FDT_VIRT_SIZE);
 
+    /* Register Xen's load address as a boot module. */
+    if ( !add_boot_module(BOOTMOD_XEN, virt_to_maddr(_start),
+                          _end - _start, false) )
+        panic("Failed to add BOOTMOD_XEN\n");
+
     printk("All set up\n");
 
     machine_halt();
--
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