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hv: vpci: pass through stolen memory and opregion memory for GVT-D

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In order to add GVT-D support, we need pass through stolen memory and opregion memroy
to the post-launched VM. To implement this, we first reserve the GPA for stolen memory
and opregion memory through post-launched VM e820 table. Then we would build EPT mapping
between the GPA and the stolen memory and opregion memory real HPA. The last, we need to
return the GPA to post-launched VM if it wants to read the stolen memory and opregion
memory address and prevent post-launched VM to write the stolen memory and opregion memory
address register for now.
We do the GPA reserve and GPA to HPA EPT mapping in ACRN-DM and the stolen memory and
opregion memory CFG space register access emulation in ACRN-HV.

Tracked-On: #4371
Signed-off-by: Li Fei1 <fei1.li@intel.com>
This commit is contained in:
Li Fei1
2020-03-10 22:58:05 +08:00
committed by wenlingz
parent 659e5420df
commit fa74bf401d
3 changed files with 62 additions and 5 deletions
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25
hypervisor/dm/vpci/vpci.c
View File

@@ -482,8 +482,12 @@ static int32_t write_pt_dev_cfg(struct pci_vdev *vdev, uint32_t offset,
} else if (sriovcap_access(vdev, offset)) {
write_sriov_cap_reg(vdev, offset, bytes, val);
} else {
/* passthru to physical device */
pci_pdev_write_cfg(vdev->pdev->bdf, offset, bytes, val);
/* For GVT-D, prevent stolen memory and opregion memory write */
if (!(is_postlaunched_vm(vdev->vpci->vm) && is_gvtd(vdev->pdev->bdf) &&
((offset == PCIR_BDSM) || (offset == PCIR_ASLS_CTL)))) {
/* passthru to physical device */
pci_pdev_write_cfg(vdev->pdev->bdf, offset, bytes, val);
}
}
return 0;
@@ -501,8 +505,14 @@ static int32_t read_pt_dev_cfg(const struct pci_vdev *vdev, uint32_t offset,
} else if (sriovcap_access(vdev, offset)) {
read_sriov_cap_reg(vdev, offset, bytes, val);
} else {
/* passthru to physical device */
*val = pci_pdev_read_cfg(vdev->pdev->bdf, offset, bytes);
/* For GVT-D, just return GPA for stolen memory and opregion memory read. */
if (is_postlaunched_vm(vdev->vpci->vm) && is_gvtd(vdev->pdev->bdf) &&
((offset == PCIR_BDSM) || (offset == PCIR_ASLS_CTL))) {
*val = pci_vdev_read_vcfg(vdev, offset, bytes);
} else {
/* passthru to physical device */
*val = pci_pdev_read_cfg(vdev->pdev->bdf, offset, bytes);
}
}
return 0;
@@ -752,6 +762,12 @@ int32_t vpci_assign_pcidev(struct acrn_vm *tgt_vm, struct acrn_assign_pcidev *pc
pci_vdev_write_vbar(vdev, idx, pcidev->bar[idx]);
}
if (is_gvtd(bdf)) {
/* rsvd2[0U] for stolen memory GPA; rsvd2[1U] for opregion memory GPA */
pci_vdev_write_vcfg(vdev, PCIR_BDSM, 4U, pcidev->rsvd2[0U]);
pci_vdev_write_vcfg(vdev, PCIR_ASLS_CTL, 4U, pcidev->rsvd2[1U]);
}
vdev->bdf.value = pcidev->virt_bdf;
spinlock_release(&tgt_vm->vpci.lock);
vdev_in_sos->new_owner = vdev;
@@ -800,7 +816,6 @@ int32_t vpci_deassign_pcidev(struct acrn_vm *tgt_vm, struct acrn_assign_pcidev *
deinit_vmsi(vdev);
deinit_vmsix(vdev);
}
spinlock_release(&tgt_vm->vpci.lock);