diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2024-02-14 13:29:04 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2024-02-16 12:42:33 +0000 |
| commit | 97a6f43bb049e64b9913c50c7530e13d78e205d4 (patch) | |
| tree | f27badee5d092ecc09f221e6ce6dd19b83e9b44c /arch/arm64/kernel/setup.c | |
| parent | 82ca151da7d54d7571c5d511d016b7780d5d559f (diff) | |
arm64: head: Move early kernel mapping routines into C code
The asm version of the kernel mapping code works fine for creating a
coarse grained identity map, but for mapping the kernel down to its
exact boundaries with the right attributes, it is not suitable. This is
why we create a preliminary RWX kernel mapping first, and then rebuild
it from scratch later on.
So let's reimplement this in C, in a way that will make it unnecessary
to create the kernel page tables yet another time in paging_init().
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20240214122845.2033971-63-ardb+git@google.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel/setup.c')
| -rw-r--r-- | arch/arm64/kernel/setup.c | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index 0ef45d1927b3..0ea45b6d0177 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -283,13 +283,6 @@ void __init __no_sanitize_address setup_arch(char **cmdline_p) kaslr_init(); - /* - * If know now we are going to need KPTI then use non-global - * mappings from the start, avoiding the cost of rewriting - * everything later. - */ - arm64_use_ng_mappings = kaslr_enabled() && kaslr_requires_kpti(); - early_fixmap_init(); early_ioremap_init(); |