[PATCH v4 0/1] riscv: Allow to downgrade paging mode from the command line

[Björn Töpel]

Alexandre Ghiti <alexghiti at rivosinc.com> writes:

> This new version gets rid of the limitation that prevented KASAN kernels
> to use the newly introduced parameters.
>
> While looking into KASLR, I fell onto commit aacd149b6238 ("arm64: head:
> avoid relocating the kernel twice for KASLR"): it allows to use the fdt
> functions very early in the boot process with KASAN enabled by simply
> compiling a new version of those functions without instrumentation.
>
> I had to change the handling of the command line parsing to make the
> code self-contained in kernel/pi/cmd_early.c to avoid calling too many
> __pi prefixed functions from outside this file.
>
> I'll use this approach like arm64 to handle the extraction of the random
> seedi from the device tree for KASLR.
>
> @Ard: I copied the "pi" name but I have to admit I don't know what it
> means.

__pi_ is for "position-independent" -- KASLR related.

For the (tiny ;-)) series:

Tested-by: Björn Töpel <bjorn at rivosinc.com>
Reviewed-by: Björn Töpel <bjorn at rivosinc.com>