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intel-iommu: add Intel IOMMU emulation to q35 and add a machine option "iommu" as a switch

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Add Intel IOMMU emulation to q35 chipset and expose it to the guest.
1. Add a machine option. Users can use "-machine iommu=on|off" in the command
line to enable/disable Intel IOMMU. The default is off.
2. Accroding to the machine option, q35 will initialize the Intel IOMMU and
use pci_setup_iommu() to setup q35_host_dma_iommu() as the IOMMU function for
the pci bus.
3. q35_host_dma_iommu() will return different address space according to the
bus_num and devfn of the device.

Signed-off-by: Le Tan <tamlokveer@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Le Tan 2014-08-16 13:55:40 +08:00 • committed by Michael S. Tsirkin
parent d4eb911935
commit a52a7fdfa7
6 changed files with 74 additions and 1 deletions
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1
include/hw/boards.h
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@ -123,6 +123,7 @@ struct MachineState {
bool mem_merge;
bool usb;
char *firmware;
bool iommu;
ram_addr_t ram_size;
ram_addr_t maxram_size;