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hv: vpci: minor refine the vdev ownership data structure

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Add a new field 'parent_user' to record the parent user of the vdev.  And refine
'new_owner' to 'user' to record who is the current user of the vdev. Like

-----------------------------------------------------------------------------------------------
vdev in    |   HV       |   pre-VM       |               SOS                   | post-VM
           |            |                |vdev used by SOS|vdev used by post-VM|
-----------------------------------------------------------------------------------------------
parent_user| NULL(HV)   |   NULL(HV)     |   NULL(HV)     |   NULL(HV)         | vdev in SOS
-----------------------------------------------------------------------------------------------
user       | vdev in HV | vdev in pre-VM |   vdev in SOS  |   vdev in post-VM  | vdev in post-VM
-----------------------------------------------------------------------------------------------

Tracked-On: #4550
Signed-off-by: Li Fei1 <fei1.li@intel.com>
Acked-by: Eddie Dong<eddie.dong@Intel.com>
This commit is contained in:
Li Fei1
2020-05-07 09:44:07 +08:00
committed by wenlingz
parent 1bc5c7ac5b
commit af8329394b
5 changed files with 36 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
hypervisor/include/dm/vpci.h
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@@ -123,8 +123,16 @@ struct pci_vdev {
/* Pointer to corressponding operations */
const struct pci_vdev_ops *vdev_ops;
/* For SOS, if the device is latterly assigned to a UOS, we use this field to track the new owner. */
struct pci_vdev *new_owner;
/*
* vdev in | HV | pre-VM | SOS | post-VM
* | | |vdev used by SOS|vdev used by post-VM|
* -----------------------------------------------------------------------------------------------
* parent_user| NULL(HV) | NULL(HV) | NULL(HV) | NULL(HV) | vdev in SOS
* -----------------------------------------------------------------------------------------------
* user | vdev in HV | vdev in pre-VM | vdev in SOS | vdev in post-VM | vdev in post-VM
*/
struct pci_vdev *parent_user;
struct pci_vdev *user;
};
union pci_cfg_addr_reg {