github/acrn-hypervisor
1
0
Fork 0
mirror of https://github.com/projectacrn/acrn-hypervisor.git synced 2025-09-21 00:38:28 +00:00
Code Issues Projects Releases Wiki Activity

hv: vpci: restore PCI BARs when doing AF FLR

Browse Source 
ACRN hypervisor should trap guest doing PCI AF FLR. Besides, it should save some status
before doing the FLR and restore them later, only BARs values for now.
This patch will trap guest Conventional PCI Advanced Features Control Register write
operation if the device supports Conventional PCI Advanced Features Capability and
check whether it wants to do device AF FLR. If it does, call pdev_do_flr to do the job.

Tracked-On: #3465
Signed-off-by: Li Fei1 <fei1.li@intel.com>
This commit is contained in:
Li Fei1
2019-12-19 23:29:50 +08:00
committed by wenlingz
parent a90e0f6c84
commit 1fddf943d8
5 changed files with 26 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
hypervisor/dm/vpci/pci_pt.c
View File

@@ -235,6 +235,8 @@ void init_vdev_pt(struct pci_vdev *vdev)
vdev->has_flr = vdev->pdev->has_flr;
vdev->pcie_capoff = vdev->pdev->pcie_capoff;
vdev->has_af_flr = vdev->pdev->has_af_flr;
vdev->af_capoff = vdev->pdev->af_capoff;
for (idx = 0U; idx < vdev->nr_bars; idx++) {
vbar = &vdev->bar[idx];

5
hypervisor/dm/vpci/vpci.c
View File

@@ -337,8 +337,9 @@ static int32_t vpci_write_pt_dev_cfg(struct pci_vdev *vdev, uint32_t offset,
vmsi_write_cfg(vdev, offset, bytes, val);
} else if (msixcap_access(vdev, offset)) {
vmsix_write_cfg(vdev, offset, bytes, val);
} else if (vdev->has_flr && ((vdev->pcie_capoff + PCIR_PCIE_DEVCTRL) == offset) &&
((val & PCIM_PCIE_FLR) != 0U)) {
} else if ((vdev->has_flr && ((vdev->pcie_capoff + PCIR_PCIE_DEVCTRL) == offset) &&
((val & PCIM_PCIE_FLR) != 0U)) || (vdev->has_af_flr &&
((vdev->af_capoff + PCIR_AF_CTRL) == offset) && ((val & PCIM_AF_FLR) != 0U))) {
/* Assume that guest write FLR must be 4 bytes aligned */
pdev_do_flr(vdev->pdev->bdf, offset, bytes, val);
} else {