Re: [PATCH kernel v11 02/10] powerpc/powernv/iommu: Add real mode version of iommu_table_ops::exchange()

Alexey Kardashevskiy writes: > diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c > index 5f202a566ec5..9bace5df05d5 100644 > --- a/arch/powerpc/kernel/iommu.c > +++ b/arch/powerpc/kernel/iommu.c > @@ -1004,6 +1004,29 @@ long iommu_tce_xchg(struct iommu_table

[PATCH kernel v11 02/10] powerpc/powernv/iommu: Add real mode version of iommu_table_ops::exchange()

In real mode, TCE tables are invalidated using special cache-inhibited store instructions which are not available in virtual mode This defines and implements exchange_rm() callback. This does not define set_rm/clear_rm/flush_rm callbacks as there is no user for those - exchange/exchange_rm are