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hw/pci/pci_host: Allow PCI host to bypass iommu

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Add a new bypass_iommu property for PCI host and use it to check
whether devices attached to the PCI root bus will bypass iommu.
In pci_device_iommu_address_space(), check the property and
avoid getting iommu address space for devices bypass iommu.

Signed-off-by: Xingang Wang <wangxingang5@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <1625748919-52456-2-git-send-email-wangxingang5@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Xingang Wang 2021-07-08 12:55:11 +00:00 • committed by Michael S. Tsirkin
parent 7395b3e3e7
commit 2d64b7bbb2
4 changed files with 20 additions and 1 deletions
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1
hw/pci/pci_host.c
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@ -222,6 +222,7 @@ const VMStateDescription vmstate_pcihost = {
static Property pci_host_properties_common[] = {
DEFINE_PROP_BOOL("x-config-reg-migration-enabled", PCIHostState,
mig_enabled, true),
DEFINE_PROP_BOOL("bypass-iommu", PCIHostState, bypass_iommu, false),
DEFINE_PROP_END_OF_LIST(),
};