vfio: Fix build break when SPAPR_TCE_IOMMU=n

Currently the kconfig logic for VFIO_IOMMU_SPAPR_TCE and VFIO_SPAPR_EEH
is broken when SPAPR_TCE_IOMMU=n. Leading to:

    warning: (VFIO) selects VFIO_IOMMU_SPAPR_TCE which has unmet direct dependencies (VFIO && SPAPR_TCE_IOMMU)
    warning: (VFIO) selects VFIO_IOMMU_SPAPR_TCE which has unmet direct dependencies (VFIO && SPAPR_TCE_IOMMU)
    drivers/vfio/vfio_iommu_spapr_tce.c:113:8: error: implicit declaration of function 'mm_iommu_find'

This stems from the fact that VFIO selects VFIO_IOMMU_SPAPR_TCE, and
although it has an if clause, the condition is not correct.

We could fix it by doing select VFIO_IOMMU_SPAPR_TCE if SPAPR_TCE_IOMMU,
but the cleaner fix is to drop the selects and tie VFIO_IOMMU_SPAPR_TCE
to the value of VFIO, and express the dependencies in only once place.

Do the same for VFIO_SPAPR_EEH.

The end result is that the values of VFIO_IOMMU_SPAPR_TCE and
VFIO_SPAPR_EEH follow the value of VFIO, except when SPAPR_TCE_IOMMU=n
and/or EEH=n. Which is exactly what we want to happen.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

diff --git a/drivers/vfio/Kconfig b/drivers/vfio/Kconfig
index 23eced02aaf687fabdc5d76a8ad7649b7bcd5555..c84333eb5eb59bef3ab1ee41b7aea6e0ee982c75 100644 (file)
--- a/drivers/vfio/Kconfig
+++ b/drivers/vfio/Kconfig
@@ -6,12 +6,12 @@ config VFIO_IOMMU_TYPE1
 config VFIO_IOMMU_SPAPR_TCE
        tristate
        depends on VFIO && SPAPR_TCE_IOMMU
-       default n
+       default VFIO
 
 config VFIO_SPAPR_EEH
        tristate
        depends on EEH && VFIO_IOMMU_SPAPR_TCE
-       default n
+       default VFIO
 
 config VFIO_VIRQFD
        tristate
@@ -22,8 +22,6 @@ menuconfig VFIO
        tristate "VFIO Non-Privileged userspace driver framework"
        depends on IOMMU_API
        select VFIO_IOMMU_TYPE1 if (X86 || S390 || ARM_SMMU || ARM_SMMU_V3)
-       select VFIO_IOMMU_SPAPR_TCE if (PPC_POWERNV || PPC_PSERIES)
-       select VFIO_SPAPR_EEH if (PPC_POWERNV || PPC_PSERIES)
        select ANON_INODES
        help
          VFIO provides a framework for secure userspace device drivers.