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-----Original Message----- From: Koenig, Christian Christian.Koenig@amd.com Sent: Wednesday, December 3, 2025 11:03 AM To: Greg Kroah-Hartman gregkh@linuxfoundation.org; stable@vger.kernel.org Cc: patches@lists.linux.dev; Liang, Prike Prike.Liang@amd.com; Deucher, Alexander Alexander.Deucher@amd.com Subject: Re: [PATCH 6.17 129/146] drm/amdgpu: attach tlb fence to the PTs update

Oh, wait a second, that one should clearly *not* be backported!

@Alex or do we have userqueue support working on 6.17? I don't think so.

Yes, userq support is available in 6.17. That said, this patch did end up causing a regression on SI parts. I've got a fix for that which will land soon.

Alex

Regards, Christian.

On 12/3/25 16:28, Greg Kroah-Hartman wrote:

...

6.17-stable review patch. If anyone has any objections, please let me know.

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From: Prike Liang Prike.Liang@amd.com

commit b4a7f4e7ad2b120a94f3111f92a11520052c762d upstream.

Ensure the userq TLB flush is emitted only after the VM update finishes and the PT BOs have been annotated with bookkeeping fences.

Suggested-by: Christian König christian.koenig@amd.com Signed-off-by: Prike Liang Prike.Liang@amd.com Reviewed-by: Christian König christian.koenig@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com (cherry picked from commit f3854e04b708d73276c4488231a8bd66d30b4671) Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

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drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -1056,7 +1056,7 @@ amdgpu_vm_tlb_flush(struct amdgpu_vm_upd }

/* Prepare a TLB flush fence to be attached to PTs */

• if (!params->unlocked && vm->is_compute_context) {

• if (!params->unlocked) { amdgpu_vm_tlb_fence_create(params->adev, vm, fence);

      /* Makes sure no PD/PT is freed before the flush */