On Mon, Sep 14, 2020 at 11:13:07AM -0700, Vennila Megavannan wrote: > From: Srinath Mannam <[email protected]> > > Add provision to change default value of MSI IOVA base to platform's > suitable IOVA using module parameter. The present hardcoded MSI IOVA base > may not be the accessible IOVA ranges of platform. > > If any platform has the limitaion to access default MSI IOVA, then it can > be changed using "arm-smmu.msi_iova_base=0xa0000000" command line argument. > > Signed-off-by: Srinath Mannam <[email protected]> > Co-developed-by: Vennila Megavannan <[email protected]> > Signed-off-by: Vennila Megavannan <[email protected]> > --- > drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 5 ++++- > drivers/iommu/arm/arm-smmu/arm-smmu.c | 5 ++++- > 2 files changed, 8 insertions(+), 2 deletions(-)
This feels pretty fragile. Wouldn't it be better to realise that there's a region conflict with iommu_dma_get_resv_regions() and move the MSI window accordingly at runtime? Will
