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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
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2
hypervisor/dm/vpci/vmsix.c
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@@ -195,7 +195,7 @@ int32_t vmsix_handle_table_mmio_access(struct io_request *io_req, void *handler_
vdev = (struct pci_vdev *)handler_private_data;
/* This device has not be assigned to other OS */
if (vdev->new_owner == NULL) {
if (vdev->user == vdev) {
offset = mmio->address - vdev->msix.mmio_gpa;
if (msixtable_access(vdev, (uint32_t)offset)) {