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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

5
hypervisor/dm/vpci/vhostbridge.c
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@@ -86,10 +86,15 @@ static void init_vhostbridge(struct pci_vdev *vdev)
pci_vdev_write_vcfg(vdev, 0xf5U, 1U, 0xfU);
pci_vdev_write_vcfg(vdev, 0xf6U, 1U, 0x1cU);
pci_vdev_write_vcfg(vdev, 0xf7U, 1U, 0x1U);
vdev->parent_user = NULL;
vdev->user = vdev;
}
static void deinit_vhostbridge(__unused struct pci_vdev *vdev)
{
vdev->parent_user = NULL;
vdev->user = NULL;
}