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drm/amdgpu: limit block size to one page
Signed-off-by: Chunming Zhou <David1.Zhou@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>
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@ -1042,6 +1042,14 @@ static bool amdgpu_check_pot_argument(int arg)
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static void amdgpu_get_block_size(struct amdgpu_device *adev)
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{
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/* from AI, asic starts to support multiple level VMPT */
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if (adev->family >= AMDGPU_FAMILY_AI) {
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if (amdgpu_vm_block_size != 9)
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dev_warn(adev->dev, "Multi-VMPT limits block size to"
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"one page!\n");
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amdgpu_vm_block_size = 9;
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return;
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}
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/* defines number of bits in page table versus page directory,
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* a page is 4KB so we have 12 bits offset, minimum 9 bits in the
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* page table and the remaining bits are in the page directory */
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