linux-kernel - Re: [PATCH v2] drm/panthor: flush FW AS caches in slow reset path

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Message-ID: <20240905094620.5744ace5@collabora.com>
Date: Thu, 5 Sep 2024 09:46:20 +0200
From: Boris Brezillon <boris.brezillon@...labora.com>
To: Steven Price <steven.price@....com>
Cc: Adrián Larumbe <adrian.larumbe@...labora.com>, Liviu
 Dudau <liviu.dudau@....com>, Maarten Lankhorst
 <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>,
 Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>,
 Daniel Vetter <daniel@...ll.ch>, Heiko Stuebner <heiko@...ech.de>, Grant
 Likely <grant.likely@...aro.org>, kernel@...labora.com,
 stable@...r.kernel.org, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] drm/panthor: flush FW AS caches in slow reset path

On Mon, 2 Sep 2024 16:11:51 +0100
Steven Price <steven.price@....com> wrote:

> On 02/09/2024 14:02, Adrián Larumbe wrote:
> > In the off-chance that waiting for the firmware to signal its booted status
> > timed out in the fast reset path, one must flush the cache lines for the
> > entire FW VM address space before reloading the regions, otherwise stale
> > values eventually lead to a scheduler job timeout.
> > 
> > Fixes: 647810ec2476 ("drm/panthor: Add the MMU/VM logical block")
> > Cc: stable@...r.kernel.org
> > Signed-off-by: Adrián Larumbe <adrian.larumbe@...labora.com>
> > Acked-by: Liviu Dudau <liviu.dudau@....com>  
> 
> Reviewed-by: Steven Price <steven.price@....com>

Pushed to drm-misc-fixes.