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vfio/pci: Stub vfio_pci_vga_rw when !CONFIG_VFIO_PCI_VGA

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Resolve build errors reported against UML build for undefined
ioport_map() and ioport_unmap() functions.  Without this config
option a device cannot have vfio_pci_core_device.has_vga set,
so the existing function would always return -EINVAL anyway.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20220123125737.2658758-1-geert@linux-m68k.org
Link: https://lore.kernel.org/r/164306582968.3758255.15192949639574660648.stgit@omen
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Alex Williamson
2022-01-24 16:11:37 -07:00
parent cfb92440ee
commit 6e031ec0e5
2 changed files with 11 additions and 0 deletions
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9
include/linux/vfio_pci_core.h
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@@ -159,8 +159,17 @@ extern ssize_t vfio_pci_config_rw(struct vfio_pci_core_device *vdev,
extern ssize_t vfio_pci_bar_rw(struct vfio_pci_core_device *vdev, char __user *buf,
size_t count, loff_t *ppos, bool iswrite);
#ifdef CONFIG_VFIO_PCI_VGA
extern ssize_t vfio_pci_vga_rw(struct vfio_pci_core_device *vdev, char __user *buf,
size_t count, loff_t *ppos, bool iswrite);
#else
static inline ssize_t vfio_pci_vga_rw(struct vfio_pci_core_device *vdev,
char __user *buf, size_t count,
loff_t *ppos, bool iswrite)
{
return -EINVAL;
}
#endif
extern long vfio_pci_ioeventfd(struct vfio_pci_core_device *vdev, loff_t offset,
uint64_t data, int count, int fd);