Re: [PATCH 4/5] x86/its: explicitly manage permissions for ITS pages

On 6/3/25 14:14, Mike Rapoport wrote:

From: "Peter Zijlstra (Intel)" peterz@infradead.org

execmem_alloc() sets permissions differently depending on the kernel configuration, CPU support for PSE and whether a page is allocated before or after mark_rodata_ro().

Add tracking for pages allocated for ITS when patching the core kernel and make sure the permissions for ITS pages are explicitly managed for both kernel and module allocations.

Fixes: 872df34d7c51 ("x86/its: Use dynamic thunks for indirect branches") Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Co-developed-by: Mike Rapoport (Microsoft) rppt@kernel.org Signed-off-by: Mike Rapoport (Microsoft) rppt@kernel.org

Reviewed-by: Nikolay Borisov nik.borisov@suse.com