On Fri, 10 Jan 2025 at 19:41, Brendan Jackman wrote:
> + asi_clone_pgd(asi_global_nonsensitive_pgd, init_mm.pgd,
> VMEMMAP_START);
> + asi_clone_pgd(asi_global_nonsensitive_pgd, init_mm.pgd,
> + VMEMMAP_START + (1UL << PGDIR_SHIFT));
There's a bug here that Yosry
Basically we need to map the kernel code and all its static variables.
Per-CPU variables need to be treated specially as described in the
comments. The cpu_entry_area is similar - this needs to be
nonsensitive so that the CPU can access the GDT etc when handling
a page fault.
Under 5-level paging,
