0b57c8160a
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@amd.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
50 lines
2.1 KiB
ReStructuredText
50 lines
2.1 KiB
ReStructuredText
Xen PVH machine (``xenpvh``)
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=========================================
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Xen supports a spectrum of types of guests that vary in how they depend
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on HW virtualization features, emulation models and paravirtualization.
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PVH is a mode that uses HW virtualization features (like HVM) but tries
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to avoid emulation models and instead use passthrough or
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paravirtualized devices.
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QEMU can be used to provide PV virtio devices on an emulated PCIe controller.
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That is the purpose of this minimal machine.
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Supported devices
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-----------------
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The x86 Xen PVH QEMU machine provide the following devices:
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- RAM
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- GPEX host bridge
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- virtio-pci devices
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The idea is to only connect virtio-pci devices but in theory any compatible
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PCI device model will work depending on Xen and guest support.
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Running
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-------
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The Xen tools will typically construct a command-line and launch QEMU
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for you when needed. But here's an example of what it can look like in
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case you need to construct one manually:
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.. code-block:: console
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qemu-system-i386 -xen-domid 3 -no-shutdown \
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-chardev socket,id=libxl-cmd,path=/var/run/xen/qmp-libxl-3,server=on,wait=off \
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-mon chardev=libxl-cmd,mode=control \
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-chardev socket,id=libxenstat-cmd,path=/var/run/xen/qmp-libxenstat-3,server=on,wait=off \
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-mon chardev=libxenstat-cmd,mode=control \
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-nodefaults \
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-no-user-config \
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-xen-attach -name g0 \
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-vnc none \
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-display none \
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-device virtio-net-pci,id=nic0,netdev=net0,mac=00:16:3e:5c:81:78 \
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-netdev type=tap,id=net0,ifname=vif3.0-emu,br=xenbr0,script=no,downscript=no \
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-smp 4,maxcpus=4 \
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-nographic \
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-machine xenpvh,ram-low-base=0,ram-low-size=2147483648,ram-high-base=4294967296,ram-high-size=2147483648,pci-ecam-base=824633720832,pci-ecam-size=268435456,pci-mmio-base=4026531840,pci-mmio-size=33554432,pci-mmio-high-base=824902156288,pci-mmio-high-size=68719476736 \
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-m 4096
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