On Fri, Dec 06, 2024 at 10:11:02AM +0000, Kevin Brodsky wrote: > kernel_pgtables_set_pkey() allows setting the pkey of all page table > pages in swapper_pg_dir, recursively. This will be needed by > kpkeys_hardened_pgtables, as it relies on all PTPs being mapped with > a non-default pkey. Those initial kernel page tables cannot > practically be assigned a non-default pkey right when they are > allocated, so mutating them during (early) boot is required. > > Signed-off-by: Kevin Brodsky <kevin.brod...@arm.com> > --- > > It feels that some sort of locking is called for in > kernel_pgtables_set_pkey(), but I couldn't figure out what would be > appropriate.
init_mm.page_table_lock is typically the one used to serialize kernel page tables IIRC.
