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vfio: selftests: Add generic PCI command register helpers

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Add vfio_pci_cmd_set()/vfio_pci_cmd_clear() read-modify-write macros
for PCI_COMMAND in vfio_pci_device.h.

Reviewed-by: David Matlack <dmatlack@google.com>
Signed-off-by: Alex Williamson <alex.williamson@nvidia.com>
Signed-off-by: Rubin Du <rubind@nvidia.com>
Link: https://lore.kernel.org/r/20260609232855.3808971-3-rubind@nvidia.com
Signed-off-by: Alex Williamson <alex@shazbot.org>
This commit is contained in:
Rubin Du 2026-06-09 16:28:53 -07:00 committed by Alex Williamson
parent df34ecc525
commit 984b43b203
1 changed files with 14 additions and 0 deletions
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14
tools/testing/selftests/vfio/lib/include/libvfio/vfio_pci_device.h
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@ -67,6 +67,20 @@ void vfio_pci_config_access(struct vfio_pci_device *device, bool write,
#define vfio_pci_config_writew(_d, _o, _v) vfio_pci_config_write(_d, _o, _v, u16)
#define vfio_pci_config_writel(_d, _o, _v) vfio_pci_config_write(_d, _o, _v, u32)
static inline void vfio_pci_cmd_set(struct vfio_pci_device *device, u16 bits)
{
u16 cmd = vfio_pci_config_readw(device, PCI_COMMAND);
vfio_pci_config_writew(device, PCI_COMMAND, cmd | bits);
}
static inline void vfio_pci_cmd_clear(struct vfio_pci_device *device, u16 bits)
{
u16 cmd = vfio_pci_config_readw(device, PCI_COMMAND);
vfio_pci_config_writew(device, PCI_COMMAND, cmd & ~bits);
}
void vfio_pci_irq_enable(struct vfio_pci_device *device, u32 index,
u32 vector, int count);
void vfio_pci_irq_disable(struct vfio_pci_device *device, u32 index);