gpu: nvgpu: Separate kernel and user GPU VA regions

Separate the kernel and userspace regions in the GPU virtual address
space. Do this by reserving the last part of the GPU VA aperture for
the kernel, and extend GPU VA aperture accordingly for regular address
spaces. This prevents the kernel polluting the userspace-visible GPU
VA regions, and thus, makes the success of fixed-address mapping more
predictable.

Bug 200077571

Change-Id: I63f0e73d4c815a4a9fa4a9ce568709974690ef0f
Signed-off-by: Sami Kiminki <skiminki@nvidia.com>
Reviewed-on: http://git-master/r/747191
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/as_gk20a.c b/drivers/gpu/nvgpu/gk20a/as_gk20a.c
index feb22ea8..87b32add 100644
--- a/drivers/gpu/nvgpu/gk20a/as_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/as_gk20a.c
@@ -262,7 +262,7 @@ static int gk20a_as_ioctl_get_va_regions(
         unsigned int write_entries;
         struct nvgpu_as_va_region __user *user_region_ptr;
         struct vm_gk20a *vm = as_share->vm;
-        int page_sizes = gmmu_nr_page_sizes;
+        int page_sizes = gmmu_page_size_kernel;
 
         gk20a_dbg_fn("");