Il 08/12/21 13:07, Dafna Hirschfeld ha scritto:
From: Yong Wu <yong.wu@xxxxxxxxxxxx> Prepare for 2 HWs that sharing pgtable in different power-domains. When there are 2 M4U HWs, it may has problem in the flush_range in which we get the pm_status via the m4u dev, BUT that function don't reflect the real power-domain status of the HW since there may be other HW also use that power-domain. DAM allocation is often done while the allocating device is runtime suspended. In such a case the iommu will also be suspended and partial flushing of the tlb will not be executed. Therefore, we add a tlb_flush_all in the pm_runtime_resume to make sure the tlb is always clean. In other case, the iommu's power should be active via device link with smi. Signed-off-by: Yong Wu <yong.wu@xxxxxxxxxxxx> [move the call to mtk_iommu_tlb_flush_all to the bottom of resume cb, improve doc/log] Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@xxxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>