@@ -390,12 +390,19 @@ static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom,
unsigned int domid)
{
const struct mtk_iommu_iova_region *region;
+ struct mtk_iommu_data *tmpdata;
- /* Use the exist domain as there is only one pgtable here. */
- if (data->m4u_dom) {
- dom->iop = data->m4u_dom->iop;
- dom->cfg = data->m4u_dom->cfg;
- dom->domain.pgsize_bitmap = data->m4u_dom->cfg.pgsize_bitmap;
+ /*
+ * Loop to find if there is already the exist domain.
+ * Use it when 2 iommu HWs share the pgtable.
+ */
+ for_each_m4u(tmpdata) {
+ if (!tmpdata->m4u_dom)
+ continue;
+
+ dom->iop = tmpdata->m4u_dom->iop;
+ dom->cfg = tmpdata->m4u_dom->cfg;
+ dom->domain.pgsize_bitmap = tmpdata->m4u_dom->cfg.pgsize_bitmap;
goto update_iova_region;
}
In the this commit 4f956c97d26b ("iommu/mediatek: Move domain_finalise into attach_device"), I overlooked the sharing pgtable case. After that commit, the "data" in the mtk_iommu_domain_finalise always is the data of the current IOMMU HW, If it's sharing pgtable case, here is not right. This patch fix this. In sharing pgable case, we will loop the list to find if there already is the exist domain. this only affect mt2712 which is the only SoC that sharing pgtable. Fixes: 4f956c97d26b ("iommu/mediatek: Move domain_finalise into attach_device") Signed-off-by: Chao Hao <chao.hao@mediatek.com> Signed-off-by: Yong Wu <yong.wu@mediatek.com> --- drivers/iommu/mtk_iommu.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-)