[PATCH 5.12 012/161] vfio/pci: zap_vma_ptes() needs MMU

From: Greg Kroah-Hartman
Date: Tue Jun 08 2021 - 15:15:38 EST

From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

[ Upstream commit 2a55ca37350171d9b43d561528f23d4130097255 ]

zap_vma_ptes() is only available when CONFIG_MMU is set/enabled.
Without CONFIG_MMU, vfio_pci.o has build errors, so make
VFIO_PCI depend on MMU.

riscv64-linux-ld: drivers/vfio/pci/vfio_pci.o: in function `vfio_pci_mmap_open':
vfio_pci.c:(.text+0x1ec): undefined reference to `zap_vma_ptes'
riscv64-linux-ld: drivers/vfio/pci/vfio_pci.o: in function `.L0 ':
vfio_pci.c:(.text+0x165c): undefined reference to `zap_vma_ptes'

Fixes: 11c4cd07ba11 ("vfio-pci: Fault mmaps to enable vma tracking")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Cc: Alex Williamson <alex.williamson@xxxxxxxxxx>
Cc: Cornelia Huck <cohuck@xxxxxxxxxx>
Cc: kvm@xxxxxxxxxxxxxxx
Cc: Jason Gunthorpe <jgg@xxxxxxxxxx>
Cc: Eric Auger <eric.auger@xxxxxxxxxx>
Message-Id: <20210515190856.2130-1-rdunlap@xxxxxxxxxxxxx>
Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
drivers/vfio/pci/Kconfig | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig
index 4abddbebd4b2..c691127bc805 100644
--- a/drivers/vfio/pci/Kconfig
+++ b/drivers/vfio/pci/Kconfig
@@ -2,6 +2,7 @@
config VFIO_PCI
tristate "VFIO support for PCI devices"
depends on VFIO && PCI && EVENTFD
+ depends on MMU