This is a note to let you know that I've just added the patch titled
vfio: Depend on MMU
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-depend-on-mmu.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 b2b12db53507bc97d96f6b7cb279e831e5eafb00 Mon Sep 17 00:00:00 2001
From: Jason Gunthorpe <jgg@xxxxxxxxxx>
Date: Thu, 4 Mar 2021 21:30:03 -0400
Subject: vfio: Depend on MMU
From: Jason Gunthorpe <jgg@xxxxxxxxxx>
commit b2b12db53507bc97d96f6b7cb279e831e5eafb00 upstream.
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@xxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Message-Id: <0-v1-02cb5500df6e+78-vfio_no_mmu_jgg@xxxxxxxxxx>
Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/vfio/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- 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.
Patches currently in stable-queue which might be from jgg@xxxxxxxxxx are
queue-5.11/vfio-depend-on-mmu.patch
