Re: [PATCH v4 3/6] riscv: Move DTB_EARLY_BASE_VA to the kernel address space

Björn Töpel
2023-02-17T15:00:38Z

Alexandre Ghiti <alexghiti@rivosinc.com> writes:

> The early virtual address should lie in the kernel address space for
> inline kasan instrumentation to succeed, otherwise kasan tries to
> dereference an address that does not exist in the address space (since
> kasan only maps *kernel* address space, not the userspace).
>
> Simply use the very first address of the kernel address space for the
> early fdt mapping.
>
> It allowed an Ubuntu kernel to boot successfully with inline
> instrumentation.
>
> Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>

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