linux-kernel - Re: [PATCH] microblaze: Fix built-in DTB alignment to be 8-byte aligned

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Date:   Tue, 16 Feb 2021 07:44:17 +0100
From:   Michal Simek <monstr@...str.eu>
To:     Rob Herring <robh@...nel.org>
Cc:     DTML <devicetree@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Guenter Roeck <linux@...ck-us.net>
Subject: Re: [PATCH] microblaze: Fix built-in DTB alignment to be 8-byte aligned

so 13. 2. 2021 v 2:16 odesílatel Rob Herring <robh@...nel.org> napsal:
>
> Commit 79edff12060f ("scripts/dtc: Update to upstream version
> v1.6.0-51-g183df9e9c2b9") broke booting on Microblaze systems depending on
> the build. The problem is libfdt gained an 8-byte starting alignment check,
> but the Microblaze built-in DTB area is only 4-byte aligned. This affected
> not just built-in DTBs as bootloader passed DTBs are copied into the
> built-in DTB region.
>
> Other arches using built-in DTBs use a common linker macro which has
> sufficient alignment.
>
> Fixes: 79edff12060f ("scripts/dtc: Update to upstream version v1.6.0-51-g183df9e9c2b9")
> Reported-by: Guenter Roeck <linux@...ck-us.net>
> Tested-by: Guenter Roeck <linux@...ck-us.net>
> Cc: Michal Simek <monstr@...str.eu>
> Signed-off-by: Rob Herring <robh@...nel.org>
> ---
> As the commit is in my tree, I'll take this via the DT tree.
>
>  arch/microblaze/kernel/vmlinux.lds.S | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/microblaze/kernel/vmlinux.lds.S b/arch/microblaze/kernel/vmlinux.lds.S
> index df07b3d06cd6..fb31747ec092 100644
> --- a/arch/microblaze/kernel/vmlinux.lds.S
> +++ b/arch/microblaze/kernel/vmlinux.lds.S
> @@ -45,7 +45,7 @@ SECTIONS {
>                 _etext = . ;
>         }
>
> -       . = ALIGN (4) ;
> +       . = ALIGN (8) ;
>         __fdt_blob : AT(ADDR(__fdt_blob) - LOAD_OFFSET) {
>                 _fdt_start = . ;                /* place for fdt blob */
>                 *(__fdt_blob) ;                 /* Any link-placed DTB */
> --
> 2.27.0
>

Applied.

Thanks,
Michal


-- 
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