vfio: Depend on MMU

VFIO_IOMMU_TYPE1 does not compile with !MMU:

../drivers/vfio/vfio_iommu_type1.c: In function 'follow_fault_pfn':
../drivers/vfio/vfio_iommu_type1.c:536:22: error: implicit declaration of function 'pte_write'; did you mean 'vfs_write'? [-Werror=implicit-function-declaration]

So require it.

Suggested-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Message-Id: <0-v1-02cb5500df6e+78-vfio_no_mmu_jgg@nvidia.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

diff --git a/drivers/vfio/Kconfig b/drivers/vfio/Kconfig
index 90c0525b1e0cf405f6d3184e24e6972faa16f6d6..67d0bf4efa16066c8437efafbcee323d71fedc41 100644 (file)
--- a/drivers/vfio/Kconfig
+++ b/drivers/vfio/Kconfig
@@ -22,7 +22,7 @@ config VFIO_VIRQFD
 menuconfig VFIO
        tristate "VFIO Non-Privileged userspace driver framework"
        select IOMMU_API
-       select VFIO_IOMMU_TYPE1 if (X86 || S390 || ARM || ARM64)
+       select VFIO_IOMMU_TYPE1 if MMU && (X86 || S390 || ARM || ARM64)
        help
          VFIO provides a framework for secure userspace device drivers.
          See Documentation/driver-api/vfio.rst for more details.