Re: [PATCH 3/3] LoongArch: Skip relocation-time KASLR if it has already been applied

[Huacai Chen]

Hi, Rui,

On Mon, Apr 27, 2026 at 6:47 PM WANG Rui <r@xxxxxx> wrote:
>
> When the kernel is relocated during early boot, a randomized load
> address may already have been selected and applied. In this case,
> performing KASLR again in relocate.c is unnecessary.
>
> Signed-off-by: WANG Rui <r@xxxxxx>
> ---
>  arch/loongarch/kernel/relocate.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/arch/loongarch/kernel/relocate.c b/arch/loongarch/kernel/relocate.c
> index 16f6a9b39659..c36604a81d08 100644
> --- a/arch/loongarch/kernel/relocate.c
> +++ b/arch/loongarch/kernel/relocate.c
> @@ -139,6 +139,10 @@ static inline __init bool kaslr_disabled(void)
>         char *str;
>         const char *builtin_cmdline = CONFIG_CMDLINE;
>
> +       /* KASLR is performed during early boot. */
> +       if (kaslr_offset())
> +               return true;
Maybe the "kexec_file" case is also handled by this?

Huacai

> +
>         str = strstr(builtin_cmdline, "nokaslr");
>         if (str == builtin_cmdline || (str > builtin_cmdline && *(str - 1) == ' ')) {
>                 pr_info(KASLR_DISABLED_MESSAGE, "\'nokaslr\'", "built-in");
> --
> 2.54.0
>