dlan17/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

virt: acrn: Introduce interfaces for virtual device creating/destroying

Browse Source 
The ACRN hypervisor can emulate a virtual device within hypervisor for a
Guest VM. The emulated virtual device can work without the ACRN
userspace after creation. The hypervisor do the emulation of that device.

To support the virtual device creating/destroying, HSM provides the
following ioctls:
  - ACRN_IOCTL_CREATE_VDEV
    Pass data struct acrn_vdev from userspace to the hypervisor, and inform
    the hypervisor to create a virtual device for a User VM.
  - ACRN_IOCTL_DESTROY_VDEV
    Pass data struct acrn_vdev from userspace to the hypervisor, and inform
    the hypervisor to destroy a virtual device of a User VM.

These new APIs will be used by user space code vm_add_hv_vdev and
vm_remove_hv_vdev in
https://github.com/projectacrn/acrn-hypervisor/blob/master/devicemodel/core/vmmapi.c

Signed-off-by: Shuo Liu <shuo.a.liu@intel.com>
Signed-off-by: Fei Li <fei1.li@intel.com>
Link: https://lore.kernel.org/r/20210923084128.18902-3-fei1.li@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Shuo Liu
2021-10-05 16:14:10 +02:00
committed by Greg Kroah-Hartman
parent 29a9f27574
commit 424f1ac2d8
3 changed files with 92 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/uapi/linux/acrn.h
+42
View File
@@ -441,6 +441,44 @@ struct acrn_mmiodev {
} res[ACRN_MMIODEV_RES_NUM];
};
/**
* struct acrn_vdev - Info for creating or destroying a virtual device
* @id: Union of identifier of the virtual device
* @id.value: Raw data of the identifier
* @id.fields.vendor: Vendor id of the virtual PCI device
* @id.fields.device: Device id of the virtual PCI device
* @id.fields.legacy_id: ID of the virtual device if not a PCI device
* @slot: Virtual Bus/Device/Function of the virtual
* device
* @io_base: IO resource base address of the virtual device
* @io_size: IO resource size of the virtual device
* @args: Arguments for the virtual device creation
*
* The created virtual device can be a PCI device or a legacy device (e.g.
* a virtual UART controller) and it is emulated by the hypervisor. This
* structure will be passed to hypervisor directly.
*/
struct acrn_vdev {
/*
* the identifier of the device, the low 32 bits represent the vendor
* id and device id of PCI device and the high 32 bits represent the
* device number of the legacy device
*/
union {
__u64 value;
struct {
__le16 vendor;
__le16 device;
__le32 legacy_id;
} fields;
} id;
__u64 slot;
__u32 io_addr[ACRN_PCI_NUM_BARS];
__u32 io_size[ACRN_PCI_NUM_BARS];
__u8 args[128];
};
/**
* struct acrn_msi_entry - Info for injecting a MSI interrupt to a VM
* @msi_addr: MSI addr[19:12] with dest vCPU ID
@@ -596,6 +634,10 @@ struct acrn_irqfd {
_IOW(ACRN_IOCTL_TYPE, 0x57, struct acrn_mmiodev)
#define ACRN_IOCTL_DEASSIGN_MMIODEV \
_IOW(ACRN_IOCTL_TYPE, 0x58, struct acrn_mmiodev)
#define ACRN_IOCTL_CREATE_VDEV \
_IOW(ACRN_IOCTL_TYPE, 0x59, struct acrn_vdev)
#define ACRN_IOCTL_DESTROY_VDEV \
_IOW(ACRN_IOCTL_TYPE, 0x5A, struct acrn_vdev)
#define ACRN_IOCTL_PM_GET_CPU_STATE \
_IOWR(ACRN_IOCTL_TYPE, 0x60, __u64)