On Mon, Jun 29, 2020 at 09:22:50PM +0530, Sai Prakash Ranjan wrote: > diff --git a/drivers/gpu/drm/msm/msm_iommu.c b/drivers/gpu/drm/msm/msm_iommu.c > index f455c597f76d..bd1d58229cc2 100644 > --- a/drivers/gpu/drm/msm/msm_iommu.c > +++ b/drivers/gpu/drm/msm/msm_iommu.c > @@ -218,6 +218,9 @@ static int msm_iommu_map(struct msm_mmu *mmu, uint64_t iova, > iova |= GENMASK_ULL(63, 49); > > > + if (mmu->features & MMU_FEATURE_USE_SYSTEM_CACHE) > + prot |= IOMMU_SYS_CACHE_ONLY; Given that I think this is the only user of IOMMU_SYS_CACHE_ONLY, then it looks like it should actually be a property on the domain because we never need to configure it on a per-mapping basis within a domain, and therefore it shouldn't be exposed by the IOMMU API as a prot flag. Do you agree? Will
