On 18/05/18 15:26, Lionel Landwerlin wrote:
On Gen8+ this register is not priviledged and we want to use it in
Mesa to implement a feature required by GPA called Null Hardware. The
idea is to have the command parser turn 3DPRIMITIVE/GPGPU_WALKER into
NOOPs.
This patch just whitelists the bits that we need and that are
currently not used by the kernel.
One thing I don't really know is whether is should be considered an
issue with the current command parser and therefore be backported as a fix.
It would certainly make things easier because we can't really detect the
behavior from userspace.
-
Lionel
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