linux-kernel - RE: [PATCH v5 2/3] drm/virtio: fix mmap page attributes

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Date:   Wed, 26 Feb 2020 16:52:22 +0000
From:   Guillaume Gardet <Guillaume.Gardet@....com>
To:     Gerd Hoffmann <kraxel@...hat.com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>
CC:     "tzimmermann@...e.de" <tzimmermann@...e.de>,
        "gurchetansingh@...omium.org" <gurchetansingh@...omium.org>,
        "olvaffe@...il.com" <olvaffe@...il.com>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        "open list:VIRTIO GPU DRIVER" 
        <virtualization@...ts.linux-foundation.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v5 2/3] drm/virtio: fix mmap page attributes



> -----Original Message-----
> From: Gerd Hoffmann <kraxel@...hat.com>
> Sent: 26 February 2020 16:48
> To: dri-devel@...ts.freedesktop.org
> Cc: tzimmermann@...e.de; gurchetansingh@...omium.org; olvaffe@...il.com;
> Guillaume Gardet <Guillaume.Gardet@....com>; Gerd Hoffmann
> <kraxel@...hat.com>; stable@...r.kernel.org; David Airlie <airlied@...ux.ie>;
> Daniel Vetter <daniel.vetter@...ll.ch>; open list:VIRTIO GPU DRIVER
> <virtualization@...ts.linux-foundation.org>; open list <linux-
> kernel@...r.kernel.org>
> Subject: [PATCH v5 2/3] drm/virtio: fix mmap page attributes
>
> virtio-gpu uses cached mappings, set
> drm_gem_shmem_object.map_cached accordingly.
>
> Cc: stable@...r.kernel.org
> Fixes: c66df701e783 ("drm/virtio: switch from ttm to gem shmem helpers")
> Reported-by: Gurchetan Singh <gurchetansingh@...omium.org>
> Reported-by: Guillaume Gardet <Guillaume.Gardet@....com>
> Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>

Tested-by: Guillaume Gardet <Guillaume.Gardet@....com>

> ---
>  drivers/gpu/drm/virtio/virtgpu_object.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c
> b/drivers/gpu/drm/virtio/virtgpu_object.c
> index 3d2a6d489bfc..59319435218f 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_object.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_object.c
> @@ -119,6 +119,7 @@ struct drm_gem_object *virtio_gpu_create_object(struct
> drm_device *dev,
>  return NULL;
>
>  bo->base.base.funcs = &virtio_gpu_gem_funcs;
> +bo->base.map_cached = true;
>  return &bo->base.base;
>  }
>
> --
> 2.18.2

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