The patch below does not apply to the 4.17-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 9d4a0d4cdc8b5904ec7c9b9e04bab3e9e60d7a74 Mon Sep 17 00:00:00 2001
From: Andrey Grodzovsky andrey.grodzovsky@amd.com Date: Thu, 5 Jul 2018 14:49:34 -0400 Subject: [PATCH] drm/amdgpu: Verify root PD is mapped into kernel address space (v4) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit
Problem: When PD/PT update made by CPU root PD was not yet mapped causing page fault.
Fix: Verify root PD is mapped into CPU address space.
v2: Make sure that we add the root PD to the relocated list since then it's get mapped into CPU address space bt default in amdgpu_vm_update_directories.
v3: Drop change to not move kernel type BOs to evicted list.
v4: Remove redundant bo move to relocated list.
Link: https://bugs.freedesktop.org/show_bug.cgi?id=107065 Signed-off-by: Andrey Grodzovsky andrey.grodzovsky@amd.com Reviewed-by: Christian König christian.koenig@amd.com Reviewed-by: Junwei Zhang Jerry.Zhang@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index edf16b2b957a..fdcb498f6d19 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -107,6 +107,9 @@ static void amdgpu_vm_bo_base_init(struct amdgpu_vm_bo_base *base, return; list_add_tail(&base->bo_list, &bo->va);
+ if (bo->tbo.type == ttm_bo_type_kernel) + list_move(&base->vm_status, &vm->relocated); + if (bo->tbo.resv != vm->root.base.bo->tbo.resv) return;
@@ -468,7 +471,6 @@ static int amdgpu_vm_alloc_levels(struct amdgpu_device *adev, pt->parent = amdgpu_bo_ref(parent->base.bo);
amdgpu_vm_bo_base_init(&entry->base, vm, pt); - list_move(&entry->base.vm_status, &vm->relocated); }
if (level < AMDGPU_VM_PTB) {