linux-kernel - Re: [PATCH 1/1] RISC-V: load initrd wherever it fits into memory

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Date:   Tue, 29 Jun 2021 15:56:14 -0700
From:   Atish Patra <atishp@...shpatra.org>
To:     Heinrich Schuchardt <xypron.glpk@....de>
Cc:     Ard Biesheuvel <ardb@...nel.org>,
        Andreas Schwab <schwab@...ux-m68k.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Atish Patra <atish.patra@....com>, linux-efi@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] RISC-V: load initrd wherever it fits into memory

On Tue, Jun 29, 2021 at 6:40 AM Heinrich Schuchardt <xypron.glpk@....de> wrote:
>
> Requiring that initrd is loaded below RAM start + 256 MiB led to failure
> to boot SUSE Linux with GRUB on QEMU, cf.
> https://lists.gnu.org/archive/html/grub-devel/2021-06/msg00037.html
>
> Remove the constraint.
>
> Reported-by: Andreas Schwab <schwab@...ux-m68k.org>
> Signed-off-by: Heinrich Schuchardt <xypron.glpk@....de>
> ---
>  arch/riscv/include/asm/efi.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/riscv/include/asm/efi.h b/arch/riscv/include/asm/efi.h
> index 7542282f1141..649ab513dc99 100644
> --- a/arch/riscv/include/asm/efi.h
> +++ b/arch/riscv/include/asm/efi.h
> @@ -33,10 +33,10 @@ static inline unsigned long efi_get_max_fdt_addr(unsigned long image_addr)
>
>  #define ARCH_EFI_IRQ_FLAGS_MASK (SR_IE | SR_SPIE)
>
> -/* Load initrd at enough distance from DRAM start */
> +/* Load initrd anywhere in system RAM */
>  static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr)
>  {
> -       return image_addr + SZ_256M;
> +       return ULONG_MAX;
>  }
>
>  #define alloc_screen_info(x...)                (&screen_info)
> --
> 2.30.2
>

LGTM

Reviewed-by: Atish Patra <atish.patra@....com>

--
Regards,
Atish