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From:   Michal Simek <monstr@monstr.eu>
Date:   Fri, 25 Oct 2019 08:17:05 +0200
Message-ID: <CAHTX3d+b0fFdGwT9fN-GP_3JA3wPYVGFakfgXQod+CsN7skdnQ@mail.gmail.com>
Subject: Re: [PATCH] microblaze: Increase max dtb size to 64K from 32K
To:     LKML <linux-kernel@vger.kernel.org>,
        Michal Simek <monstr@monstr.eu>, git <git@xilinx.com>
Cc:     Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>,
        Casey Schaufler <casey@schaufler-ca.com>,
        James Morris <james.morris@microsoft.com>,
        John Johansen <john.johansen@canonical.com>,
        Kees Cook <keescook@chromium.org>
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=C3=BAt 8. 10. 2019 v 12:24 odes=C3=ADlatel Michal Simek <michal.simek@xili=
nx.com> napsal:
>
> From: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
>
> This patch increases max dtb size to 64K from 32K. This fixes the issue  =
of
> kernel hang with larger dtb of size greater than 32KB.
>
> Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com=
>
> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
> ---
>
>  arch/microblaze/kernel/head.S        | 2 +-
>  arch/microblaze/kernel/vmlinux.lds.S | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/microblaze/kernel/head.S b/arch/microblaze/kernel/head.=
S
> index f264fdcf152a..7d2894418691 100644
> --- a/arch/microblaze/kernel/head.S
> +++ b/arch/microblaze/kernel/head.S
> @@ -99,7 +99,7 @@ big_endian:
>  _prepare_copy_fdt:
>         or      r11, r0, r0 /* incremment */
>         ori     r4, r0, TOPHYS(_fdt_start)
> -       ori     r3, r0, (0x8000 - 4)
> +       ori     r3, r0, (0x10000 - 4)
>  _copy_fdt:
>         lw      r12, r7, r11 /* r12 =3D r7 + r11 */
>         sw      r12, r4, r11 /* addr[r4 + r11] =3D r12 */
> diff --git a/arch/microblaze/kernel/vmlinux.lds.S b/arch/microblaze/kerne=
l/vmlinux.lds.S
> index e1f3e8741292..71072c5cf61f 100644
> --- a/arch/microblaze/kernel/vmlinux.lds.S
> +++ b/arch/microblaze/kernel/vmlinux.lds.S
> @@ -46,7 +46,7 @@ SECTIONS {
>         __fdt_blob : AT(ADDR(__fdt_blob) - LOAD_OFFSET) {
>                 _fdt_start =3D . ;                /* place for fdt blob *=
/
>                 *(__fdt_blob) ;                 /* Any link-placed DTB */
> -               . =3D _fdt_start + 0x8000;        /* Pad up to 32kbyte */
> +               . =3D _fdt_start + 0x10000;       /* Pad up to 64kbyte */
>                 _fdt_end =3D . ;
>         }
>
> --
> 2.17.1
>

Applied.
M

--=20
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Xilinx Microblaze
Maintainer of Linux kernel - Xilinx Zynq ARM and ZynqMP ARM64 SoCs
U-Boot custodian - Xilinx Microblaze/Zynq/ZynqMP/Versal SoCs