From: "Jesse.Zhang" <jesse.zh...@amd.com>
fix the issue:
"amdgpu: Failed to create process VM object".
[Why]when amdgpu initialized, seq64 do mampping and update bo mapping in vm
page table.
But when clifo run. It also initializes a vm for a process device through the
function kfd_process_device_init_vm
and ensure the root PD is clean through the function amdgpu_vm_pt_is_root_clean.
So they have a conflict, and clinfo always failed.
[HOW]
Skip the seq64 entry check in vm page table.
Signed-off-by: Jesse Zhang <jesse.zh...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c
index a160265ddc07..bdae5381887e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c
@@ -746,8 +746,21 @@ bool amdgpu_vm_pt_is_root_clean(struct amdgpu_device *adev,
enum amdgpu_vm_level root = adev->vm_manager.root_level;
unsigned int entries = amdgpu_vm_pt_num_entries(adev, root);
unsigned int i = 0;
+ u64 seq64_addr = (adev->vm_manager.max_pfn << AMDGPU_GPU_PAGE_SHIFT) -
AMDGPU_VA_RESERVED_TOP;
+
+ seq64_addr /= AMDGPU_GPU_PAGE_SIZE;
+ mask = amdgpu_vm_pt_entries_mask(adev, adev->vm_manager.root_level);
+ shift = amdgpu_vm_pt_level_shift(adev, adev->vm_manager.root_level);
+ seq64_entry = (seq64_addr >> shift) & mask;
for (i = 0; i < entries; i++) {
+ /* seq64 reserve 2M memory from top of address space.
+ * Then do the mapping and update the vm page table at amdgpu
initialize.
+ * So skip the know result.
+ */
+
+ if(i == seq64_entry)
+ continue;
if (to_amdgpu_bo_vm(vm->root.bo)->entries[i].bo)
return false;
}
--
2.34.1
