From 3ffbc66fb6dd2ff0a9f5f282266a97e073f10deb Mon Sep 17 00:00:00 2001
From: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Date: Wed, 8 Jan 2025 13:19:32 +0200
Subject: [PATCH] mm: export access_remote_vm symbol for debugger use
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Export access_remote_vm as GPL symbol to allow debuggers (eudebug)
to access and modify memory in target VMs by tracking VM_BIND
operations. While access_process_vm() is already exported, it would
require maintaining task references in the debugger.
Since the mm reference is already present in the userptr's mm notifier
implementation, exporting access_remote_vm allows that existing reference
to be used directly without needing to obtain and maintain additional
task references just for memory access.
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Simona Vetter <simona@ffwll.ch>
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
---
mm/memory.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/mm/memory.c b/mm/memory.c
index 398c031be9baa..9b7c71c83db56 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -6690,6 +6690,7 @@ int access_remote_vm(struct mm_struct *mm, unsigned long addr,
{
return __access_remote_vm(mm, addr, buf, len, gup_flags);
}
+EXPORT_SYMBOL_GPL(access_remote_vm);
/*
* Access another process' address space.
--
GitLab