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vfio/pci: introduce CONFIG_VFIO_PCI_ZDEV_KVM

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The current contents of vfio-pci-zdev are today only useful in a KVM
environment; let's tie everything currently under vfio-pci-zdev to
this Kconfig statement and require KVM in this case, reducing complexity
(e.g. symbol lookups).

Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Link: https://lore.kernel.org/r/20220606203325.110625-11-mjrosato@linux.ibm.com
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
This commit is contained in:
Matthew Rosato 2022-06-06 16:33:14 -04:00 committed by Christian Borntraeger
parent d103846776
commit c435c54639
3 changed files with 13 additions and 2 deletions
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11
drivers/vfio/pci/Kconfig
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@ -44,6 +44,17 @@ config VFIO_PCI_IGD
To enable Intel IGD assignment through vfio-pci, say Y.
endif
config VFIO_PCI_ZDEV_KVM
bool "VFIO PCI extensions for s390x KVM passthrough"
depends on S390 && KVM
default y
help
Support s390x-specific extensions to enable support for enhancements
to KVM passthrough capabilities, such as interpretive execution of
zPCI instructions.
To enable s390x KVM vfio-pci extensions, say Y.
source "drivers/vfio/pci/mlx5/Kconfig"
source "drivers/vfio/pci/hisilicon/Kconfig"

2
drivers/vfio/pci/Makefile
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@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
vfio-pci-core-y := vfio_pci_core.o vfio_pci_intrs.o vfio_pci_rdwr.o vfio_pci_config.o
vfio-pci-core-$(CONFIG_S390) += vfio_pci_zdev.o
vfio-pci-core-$(CONFIG_VFIO_PCI_ZDEV_KVM) += vfio_pci_zdev.o
obj-$(CONFIG_VFIO_PCI_CORE) += vfio-pci-core.o
vfio-pci-y := vfio_pci.o

2
include/linux/vfio_pci_core.h
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@ -206,7 +206,7 @@ static inline int vfio_pci_igd_init(struct vfio_pci_core_device *vdev)
}
#endif
#ifdef CONFIG_S390
#ifdef CONFIG_VFIO_PCI_ZDEV_KVM
extern int vfio_pci_info_zdev_add_caps(struct vfio_pci_core_device *vdev,
struct vfio_info_cap *caps);
#else