Quoting Joonas Lahtinen (2017-06-02 11:19:13)
> On ke, 2017-05-31 at 10:35 +0800, Weinan Li wrote:
> > I915_GEM_GET_APERTURE ioctl is used to probe aperture size from userspace.
> > In gvt environment, each vm only use the ballooned part of aperture, so we
> > should return the correct available aperture size exclude the reserved part
> > by balloon.
> >
> > v2: add 'reserved' in struct i915_address_space to record the reserved size
> > in ggtt (Chris)
> >
> > v3: remain aper_size as total, adjust aper_available_size exclude reserved
> > and pinned. UMD driver need to adjust the max allocation size according to
> > the available aperture size but not total size. KMD return the correct
> > usable aperture size any time (Chris, Joonas)
> >
> > v4: decrease reserved in deballoon (Joonas)
> >
> > v5: add onion teardown in balloon, add vgt_deballoon_space (Joonas)
> >
> > v6: change title name (Zhenyu)
> >
> > v7: code style refine (Joonas)
> >
> > Suggested-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> > Suggested-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
> > Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> > Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
> > Cc: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx>
> > Signed-off-by: Weinan Li <weinan.z.li@xxxxxxxxx>
>
> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
>
> Comment below for Chris, if you don't merging this.
>
> <SNIP>
>
> > @@ -127,9 +134,12 @@ static int vgt_balloon_space(struct i915_ggtt *ggtt,
> >
> > DRM_INFO("balloon space: range [ 0x%lx - 0x%lx ] %lu KiB.\n",
> > start, end, size / 1024);
> > - return i915_gem_gtt_reserve(&ggtt->base, node,
> > + ret = i915_gem_gtt_reserve(&ggtt->base, node,
> > size, start, I915_COLOR_UNEVICTABLE,
> > 0);
> > + if (!ret)
> > + ggtt->base.reserved += size;
>
> Add newline here while applying the patch.
Done after a little fight with dim setup. Thanks for the patch,
-Chris
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