From: Jason Gunthorpe jgg@nvidia.com
commit e0146a108ce4d2c22b9510fd12268e3ee72a0161 upstream.
Compiling the nvlink stuff relies on the SPAPR_TCE_IOMMU otherwise there are compile errors:
drivers/vfio/pci/vfio_pci_nvlink2.c:101:10: error: implicit declaration of function 'mm_iommu_put' [-Werror,-Wimplicit-function-declaration] ret = mm_iommu_put(data->mm, data->mem);
As PPC only defines these functions when the config is set.
Previously this wasn't a problem by chance as SPAPR_TCE_IOMMU was the only IOMMU that could have satisfied IOMMU_API on POWERNV.
Fixes: 179209fa1270 ("vfio: IOMMU_API should be selected") Reported-by: kernel test robot lkp@intel.com Signed-off-by: Jason Gunthorpe jgg@nvidia.com Message-Id: 0-v1-83dba9768fc3+419-vfio_nvlink2_kconfig_jgg@nvidia.com Signed-off-by: Alex Williamson alex.williamson@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/vfio/pci/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/vfio/pci/Kconfig +++ b/drivers/vfio/pci/Kconfig @@ -42,7 +42,7 @@ config VFIO_PCI_IGD
config VFIO_PCI_NVLINK2 def_bool y - depends on VFIO_PCI && PPC_POWERNV + depends on VFIO_PCI && PPC_POWERNV && SPAPR_TCE_IOMMU help VFIO PCI support for P9 Witherspoon machine with NVIDIA V100 GPUs