linux-kernel - Re: [PATCH v1 5/6] drm/panfrost: Enable AARCH64_4K page table format on mediatek

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250311090649.0d15d74d@collabora.com>
Date: Tue, 11 Mar 2025 09:06:49 +0100
From: Boris Brezillon <boris.brezillon@...labora.com>
To: Ariel D'Alessandro <ariel.dalessandro@...labora.com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 robh@...nel.org, steven.price@....com, maarten.lankhorst@...ux.intel.com,
 mripard@...nel.org, tzimmermann@...e.de, airlied@...il.com,
 simona@...ll.ch, kernel@...labora.com, linux-mediatek@...ts.infradead.org,
 linux-arm-kernel@...ts.infradead.org, sjoerd@...labora.com
Subject: Re: [PATCH v1 5/6] drm/panfrost: Enable AARCH64_4K page table
 format on mediatek_mt8188

On Mon, 10 Mar 2025 16:59:20 -0300
Ariel D'Alessandro <ariel.dalessandro@...labora.com> wrote:

> Now that Panfrost supports AARCH64_4K page table format, let's enable it
> on Mediatek MT8188.

Can you maybe give more details on why this is needed
(legacy shareability/cacheability not suitable for this GPU?)?

> 
> Signed-off-by: Ariel D'Alessandro <ariel.dalessandro@...labora.com>
> ---
>  drivers/gpu/drm/panfrost/panfrost_drv.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
> index 0f3935556ac76..d7b8bded6d784 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_drv.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
> @@ -824,6 +824,7 @@ static const struct panfrost_compatible mediatek_mt8188_data = {
>  	.num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
>  	.pm_domain_names = mediatek_mt8183_pm_domains,
>  	.pm_features = BIT(GPU_PM_CLK_DIS) | BIT(GPU_PM_VREG_OFF),
> +	.gpu_configs = BIT(GPU_CONFIG_AARCH64_4K),
>  };
>  
>  static const char * const mediatek_mt8192_supplies[] = { "mali", NULL };