Hi Andi,

In Mesa we've been relying on I915_CONTEXT_PARAM_GTT_SIZE so as long as that is adjusted by the kernel, we should be able to continue working without issues.

Acked-by: Lionel Landwerlin <lionel.g.landwer...@intel.com>

Thanks,

-Lionel

On 13/03/2024 21:39, Andi Shyti wrote:
Commit 9bb66c179f50 ("drm/i915: Reserve some kernel space per
vm") has reserved an object for kernel space usage.

Userspace, though, needs to know the full address range.

Fixes: 9bb66c179f50 ("drm/i915: Reserve some kernel space per vm")
Signed-off-by: Andi Shyti <andi.sh...@linux.intel.com>
Cc: Andrzej Hajda <andrzej.ha...@intel.com>
Cc: Chris Wilson <chris.p.wil...@linux.intel.com>
Cc: Lionel Landwerlin <lionel.g.landwer...@intel.com>
Cc: Michal Mrozek <michal.mro...@intel.com>
Cc: Nirmoy Das <nirmoy....@intel.com>
Cc: <sta...@vger.kernel.org> # v6.2+
---
  drivers/gpu/drm/i915/gt/gen8_ppgtt.c | 3 ++-
  1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/gen8_ppgtt.c 
b/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
index fa46d2308b0e..d76831f50106 100644
--- a/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
+++ b/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
@@ -982,8 +982,9 @@ static int gen8_init_rsvd(struct i915_address_space *vm)
vm->rsvd.vma = i915_vma_make_unshrinkable(vma);
        vm->rsvd.obj = obj;
-       vm->total -= vma->node.size;
+
        return 0;
+
  unref:
        i915_gem_object_put(obj);
        return ret;


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