This is a note to let you know that I've just added the patch titled vfio/nvlink: Add missing SPAPR_TCE_IOMMU depends to the 5.11-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: vfio-nvlink-add-missing-spapr_tce_iommu-depends.patch and it can be found in the queue-5.11 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From e0146a108ce4d2c22b9510fd12268e3ee72a0161 Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe <jgg@xxxxxxxxxx> Date: Mon, 29 Mar 2021 16:00:16 -0300 Subject: vfio/nvlink: Add missing SPAPR_TCE_IOMMU depends From: Jason Gunthorpe <jgg@xxxxxxxxxx> 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@xxxxxxxxx> Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Message-Id: <0-v1-83dba9768fc3+419-vfio_nvlink2_kconfig_jgg@xxxxxxxxxx> Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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 Patches currently in stable-queue which might be from jgg@xxxxxxxxxx are queue-5.11/vfio-nvlink-add-missing-spapr_tce_iommu-depends.patch