On 15.07.24 21:21, Peter Xu wrote:

Introduce arch_check_zapped_pud() to sanity check shadow stack on PUD zaps.
It has the same logic of the PMD helper.

One thing to mention is, it might be a good idea to use page_table_check in
the future for trapping wrong setups of shadow stack pgtable entries [1].
That is left for the future as a separate effort.

[1] https://lore.kernel.org/all/59d518698f664e07c036a5098833d7b56b953305.camel@intel.com (local)

Cc: "Edgecombe, Rick P" <rick.p.edgecombe@intel.com>
Cc: Thomas Gleixner <redacted>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: x86@kernel.org
Signed-off-by: Peter Xu <peterx@redhat.com>
---

Acked-by: David Hildenbrand <redacted>

-- 
Cheers,

David / dhildenb