diff options
| author | Mostafa Saleh <smostafa@google.com> | 2026-01-09 17:18:02 +0000 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2026-01-10 10:52:25 +0100 |
| commit | 466ae6978a5b8c6022bd4537fbfd00e94bb07219 (patch) | |
| tree | a8335e79c310c76ac06d78390e3f3e2d4ed60e3a /include | |
| parent | f5b16b802174fe2b67e2b6a27fa793b749981816 (diff) | |
iommu: Add page_ext for IOMMU_DEBUG_PAGEALLOC
Add a new config IOMMU_DEBUG_PAGEALLOC, which registers new data to
page_ext.
This config will be used by the IOMMU API to track pages mapped in
the IOMMU to catch drivers trying to free kernel memory that they
still map in their domains, causing all types of memory corruption.
This behaviour is disabled by default and can be enabled using
kernel cmdline iommu.debug_pagealloc.
Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>
Reviewed-by: Pranjal Shrivastava <praan@google.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Mostafa Saleh <smostafa@google.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/iommu-debug-pagealloc.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/iommu-debug-pagealloc.h b/include/linux/iommu-debug-pagealloc.h new file mode 100644 index 000000000000..83e64d70bf6c --- /dev/null +++ b/include/linux/iommu-debug-pagealloc.h @@ -0,0 +1,17 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2025 - Google Inc + * Author: Mostafa Saleh <smostafa@google.com> + * IOMMU API debug page alloc sanitizer + */ + +#ifndef __LINUX_IOMMU_DEBUG_PAGEALLOC_H +#define __LINUX_IOMMU_DEBUG_PAGEALLOC_H + +#ifdef CONFIG_IOMMU_DEBUG_PAGEALLOC + +extern struct page_ext_operations page_iommu_debug_ops; + +#endif /* CONFIG_IOMMU_DEBUG_PAGEALLOC */ + +#endif /* __LINUX_IOMMU_DEBUG_PAGEALLOC_H */ |