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hv: vtd: check bus limit when add/remove device

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Check bus limit when add/remove device in iommu.

Tracked-On: #2743
Signed-off-by: Binbin Wu <binbin.wu@intel.com>
This commit is contained in:
Binbin Wu 2019-03-12 16:16:00 +08:00 committed by wenlingz
parent 3e5bccd755
commit 0a9aeaa10e
1 changed files with 15 additions and 0 deletions
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15
hypervisor/arch/x86/vtd.c
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@ -959,6 +959,11 @@ static int32_t remove_iommu_device(const struct iommu_domain *domain, uint16_t s
return -EINVAL;
}
if (dmar_unit->drhd->ignore) {
dev_dbg(ACRN_DBG_IOMMU, "device is ignored :0x%x:%x.%x", bus, pci_slot(devfun), pci_func(devfun));
return -EINVAL;
}
root_table = (struct dmar_root_entry *)hpa2hva(dmar_unit->root_table_addr);
root_entry = root_table + bus;
@ -1057,6 +1062,11 @@ int32_t assign_iommu_device(struct iommu_domain *domain, uint8_t bus, uint8_t de
/* TODO: check if the device assigned */
if ((uint16_t)bus >= CONFIG_IOMMU_BUS_NUM) {
pr_err("bus 0x%x out of range", bus);
return -EINVAL;
}
if (vm0_domain != NULL) {
status = remove_iommu_device(vm0_domain, 0U, bus, devfun);
if (status != 0) {
@ -1071,6 +1081,11 @@ int32_t unassign_iommu_device(const struct iommu_domain *domain, uint8_t bus, ui
{
int32_t status = 0;
if ((uint16_t)bus >= CONFIG_IOMMU_BUS_NUM) {
pr_err("bus 0x%x out of range", bus);
return -EINVAL;
}
/* TODO: check if the device assigned */
status = remove_iommu_device(domain, 0U, bus, devfun);
if (status != 0) {