diff options
| author | Tiwei Bie <tiwei.btw@antgroup.com> | 2025-04-13 23:44:21 +0800 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2025-05-05 10:25:24 +0200 |
| commit | a0e2cb6a90634f3dc80f16e882a683ee5761b0b0 (patch) | |
| tree | 604174a62b681d03647772fcd3130e61bdd36c34 /arch/um/drivers/vfio_user.h | |
| parent | 6767e8784cd2e8b386a62330ea6864949d983a3e (diff) | |
um: Add VFIO-based virtual PCI driver
Implement a new virtual PCI driver based on the VFIO framework.
This driver allows users to pass through PCI devices to UML via
VFIO. Currently, only MSI-X capable devices are supported, and
it is assumed that drivers will use MSI-X.
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Link: https://patch.msgid.link/20250413154421.517878-1-tiwei.btw@antgroup.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'arch/um/drivers/vfio_user.h')
| -rw-r--r-- | arch/um/drivers/vfio_user.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/um/drivers/vfio_user.h b/arch/um/drivers/vfio_user.h new file mode 100644 index 000000000000..75535e05059b --- /dev/null +++ b/arch/um/drivers/vfio_user.h @@ -0,0 +1,44 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __UM_VFIO_USER_H +#define __UM_VFIO_USER_H + +struct uml_vfio_user_device { + int device; + + struct { + uint64_t size; + uint64_t offset; + } *region; + int num_regions; + + int32_t *irqfd; + int irq_count; +}; + +int uml_vfio_user_open_container(void); +int uml_vfio_user_setup_iommu(int container); + +int uml_vfio_user_get_group_id(const char *device); +int uml_vfio_user_open_group(int group_id); +int uml_vfio_user_set_container(int container, int group); +int uml_vfio_user_unset_container(int container, int group); + +int uml_vfio_user_setup_device(struct uml_vfio_user_device *dev, + int group, const char *device); +void uml_vfio_user_teardown_device(struct uml_vfio_user_device *dev); + +int uml_vfio_user_activate_irq(struct uml_vfio_user_device *dev, int index); +void uml_vfio_user_deactivate_irq(struct uml_vfio_user_device *dev, int index); +int uml_vfio_user_update_irqs(struct uml_vfio_user_device *dev); + +int uml_vfio_user_cfgspace_read(struct uml_vfio_user_device *dev, + unsigned int offset, void *buf, int size); +int uml_vfio_user_cfgspace_write(struct uml_vfio_user_device *dev, + unsigned int offset, const void *buf, int size); + +int uml_vfio_user_bar_read(struct uml_vfio_user_device *dev, int bar, + unsigned int offset, void *buf, int size); +int uml_vfio_user_bar_write(struct uml_vfio_user_device *dev, int bar, + unsigned int offset, const void *buf, int size); + +#endif /* __UM_VFIO_USER_H */ |