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

[Michael Ellerman]

On Wed, 2017-03-22 at 04:21:48 UTC, Alexey Kardashevskiy wrote:
> 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 only to be used by KVM for VFIO.
> 
> The exchange_rm callback is defined for IODA1/IODA2 powernv platforms.
> 
> This replaces list_for_each_entry_rcu with its lockless version as
> from now on pnv_pci_ioda2_tce_invalidate() can be called in
> the real mode too.
> 
> Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>
> Reviewed-by: David Gibson <david at gibson.dropbear.id.au>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/a540aa56ba3d29084f28710c8b93cc

cheers