Add a new iommu domain attribute DOMAIN_ATTR_IO_PGTABLE_CFG for pagetable configuration which initially will be used to set quirks like for system cache aka last level cache to be used by client drivers like GPU to set right attributes for caching the hardware pagetables into the system cache and later can be extended to include other page table configuration data.
Signed-off-by: Sai Prakash Ranjan saiprakash.ranjan@codeaurora.org --- include/linux/io-pgtable.h | 4 ++++ include/linux/iommu.h | 1 + 2 files changed, 5 insertions(+)
diff --git a/include/linux/io-pgtable.h b/include/linux/io-pgtable.h index 4cde111e425b..215fd9d69540 100644 --- a/include/linux/io-pgtable.h +++ b/include/linux/io-pgtable.h @@ -208,6 +208,10 @@ struct io_pgtable {
#define io_pgtable_ops_to_pgtable(x) container_of((x), struct io_pgtable, ops)
+struct io_pgtable_domain_attr { + unsigned long quirks; +}; + static inline void io_pgtable_tlb_flush_all(struct io_pgtable *iop) { iop->cfg.tlb->tlb_flush_all(iop->cookie); diff --git a/include/linux/iommu.h b/include/linux/iommu.h index b95a6f8db6ff..ffaa389ea128 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -118,6 +118,7 @@ enum iommu_attr { DOMAIN_ATTR_FSL_PAMUV1, DOMAIN_ATTR_NESTING, /* two stages of translation */ DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE, + DOMAIN_ATTR_IO_PGTABLE_CFG, DOMAIN_ATTR_MAX, };