Am 07.01.2018 um 01:48 schrieb Marek Olšák:
On Sat, Jan 6, 2018 at 5:51 PM, Christian König
<ckoenig.leichtzumer...@gmail.com> wrote:
Hi Marek,
actually I was on the verge to remove the 32bit VM support in libdrm because
it clashes with HMM and SVM in general.
Is it possible to set the upper 32bit of the 64bit address to some fixed
value instead?
Yes, but not on radeon. radeon only has 8GB of virtual address space and
4GB on older kernels. I would have to change LLVM to set the high bits
differently on amdgpu but keep the high bits 0 on radeon.
That only matters on Vega10/Raven anyway.
But in general being able to define what LLVM uses for the upper bits
sounds like a good idea to me, this way we can keep the handling in Mesa.
Going to send updated libdrm patches which keeps the 32bit range usable
on Vega10/Raven as well.
Christian.
Marek
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