On Mar 19, 2013 3:01 AM, "Rob Clark" <robdclark@xxxxxxxxx> wrote:
>
> Btw, what is the hw response to invalid input (ie. bottom>top, invalid
> size, etc)?
>
Unfortunately the IOMMU page fault is happened. So we need some codes for protecting kernel.
Thank you~
Best regards YJ
> Ie. if it will just ignore the blit or raise an error irq which can be
> handled sanely, it could be ok to avoid the overhead of the cmdstream
> checking in the kernel. The kernel part really just needs to ensure
> that userspace can't cause security problems (read/write access to
> non-gfx-buffers, or lock up the system, that sort of thing). It
> doesn't need to guarantee that the results are sensible.
>
> BR,
> -R
>
> On Wed, Mar 13, 2013 at 5:03 AM, Inki Dae <inki.dae@xxxxxxxxxxx> wrote:
> > This patch set checks the contents of g2d command list from user
> > is valid or not according to G2D hardware restrictions. For now,
> > G2D driver wasn't considered for them properly.
> >
> > For this, this patch set includes relevant code cleaups, fixups
> > and adds a new function to get buffer size to the gem to be
> > accessed by G2D dma.
> >
> > Inki Dae (1):
> > drm/exynos: Add a new function to get gem buffer size
> >
> > YoungJun Cho (6):
> > drm/exynos: Fix error routine to getting dma addr.
> > drm/exynos: clear node object type at gem unmap
> > drm/exynos: Fix G2D core mulfunctioning issue
> > drm/exynos: Clean up some G2D codes for readability
> > drm/exynos: Deal with g2d buffer info more efficiently
> > drm/exynos: Check g2d cmd list for g2d restrictions
> >
> > drivers/gpu/drm/exynos/exynos_drm_g2d.c | 381 ++++++++++++++++++++++++++-----
> > drivers/gpu/drm/exynos/exynos_drm_gem.c | 21 ++
> > drivers/gpu/drm/exynos/exynos_drm_gem.h | 5 +
> > 3 files changed, 349 insertions(+), 58 deletions(-)
> >
> > --
> > 1.7.4.1
> >
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