diff options
| author | Le Tan <tamlokveer@gmail.com> | 2014-08-16 13:55:40 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2014-08-28 23:10:22 +0200 |
| commit | a52a7fdfa7512c9d095f2d5797c3c423dec43dbc (patch) | |
| tree | 3cbf148321f74ed3e8146dffa60111b06f543c22 /qemu-options.hx | |
| parent | d4eb911935640139eef7f1dd5cf9db7141578554 (diff) | |
intel-iommu: add Intel IOMMU emulation to q35 and add a machine option "iommu" as a switch
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>
Diffstat (limited to 'qemu-options.hx')
| -rw-r--r-- | qemu-options.hx | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/qemu-options.hx b/qemu-options.hx index c573dd8893..92b4da6427 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -35,7 +35,8 @@ DEF("machine", HAS_ARG, QEMU_OPTION_machine, \ " kernel_irqchip=on|off controls accelerated irqchip support\n" " kvm_shadow_mem=size of KVM shadow MMU\n" " dump-guest-core=on|off include guest memory in a core dump (default=on)\n" - " mem-merge=on|off controls memory merge support (default: on)\n", + " mem-merge=on|off controls memory merge support (default: on)\n" + " iommu=on|off controls emulated Intel IOMMU (VT-d) support (default=off)\n", QEMU_ARCH_ALL) STEXI @item -machine [type=]@var{name}[,prop=@var{value}[,...]] @@ -58,6 +59,8 @@ Include guest memory in a core dump. The default is on. Enables or disables memory merge support. This feature, when supported by the host, de-duplicates identical memory pages among VMs instances (enabled by default). +@item iommu=on|off +Enables or disables emulated Intel IOMMU (VT-d) support. The default is off. @end table ETEXI |