linux-kernel - Re: [PATCH] [PATCH] of_reserved_mem: Increase the number of reserved regions

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Message-ID: <CAAOTY_8vCb-adkbpdmbTWLeOFt-+dHjr4HVonHX7XPkLkzy1yA@mail.gmail.com>
Date:   Sun, 4 Oct 2020 21:05:11 +0800
From:   Chun-Kuang Hu <chunkuang.hu@...nel.org>
To:     Phil Chang <phil.chang@...iatek.com>
Cc:     Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        DTML <devicetree@...r.kernel.org>,
        Alix Wu <alix.wu@...iatek.com>,
        YJ Chiang <yj.chiang@...iatek.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Joe Liu <joe.liu@...iatek.com>,
        Frank Rowand <frowand.list@...il.com>
Subject: Re: [PATCH] [PATCH] of_reserved_mem: Increase the number of reserved regions

Hi, Phil:

Phil Chang <phil.chang@...iatek.com> 於 2020年10月4日 週日 下午1:51寫道：
>
> Certain SoCs need to support large amount of reserved memory
> regions, especially to follow the GKI rules from Google.
> In MTK new SoC requires more than 68 regions of reserved memory
> for each IP's usage, such as load firmware to specific sapce,

space

> so that need to reserve more regisions

regions.

I guess this requirement is from Mediatek SoC, but I find below device
tree and just find one reserved memory region,

arch/arm64/boot/dts/mediatek/mt7622.dtsi
arch/arm64/boot/dts/mediatek/mt8173.dtsi
arch/arm64/boot/dts/mediatek/mt8516.dtsi

Could you show me the 68 regions?

Regards,
Chun-Kuang.

>
> Signed-off-by: Joe Liu <joe.liu@...iatek.com>
> Signed-off-by: YJ Chiang <yj.chiang@...iatek.com>
> Signed-off-by: Alix Wu <alix.wu@...iatek.com>
> Signed-off-by: Phil Chang <phil.chang@...iatek.com>
> ---
>  drivers/of/of_reserved_mem.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
> index 46b9371c8a33..595f0741dcef 100644
> --- a/drivers/of/of_reserved_mem.c
> +++ b/drivers/of/of_reserved_mem.c
> @@ -22,7 +22,7 @@
>  #include <linux/slab.h>
>  #include <linux/memblock.h>
>
> -#define MAX_RESERVED_REGIONS   64
> +#define MAX_RESERVED_REGIONS   128
>  static struct reserved_mem reserved_mem[MAX_RESERVED_REGIONS];
>  static int reserved_mem_count;
>
> --
> 2.18.0
> _______________________________________________
> Linux-mediatek mailing list
> Linux-mediatek@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-mediatek

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