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| author | Edgar E. Iglesias <edgar.iglesias@amd.com> | 2024-08-09 19:32:27 +0200 |
|---|---|---|
| committer | Edgar E. Iglesias <edgar.iglesias@amd.com> | 2024-09-04 16:50:43 +0200 |
| commit | 0b57c8160a2a6c833cfb1d958f08385c4391ab70 (patch) | |
| tree | c05125ae40a0a9bf2429622b7cc00e0adf1c82c2 /docs | |
| parent | cb035a7bf2875535a8389e61bfbdbd5c6c218cb1 (diff) | |
| download | qemu-0b57c8160a2a6c833cfb1d958f08385c4391ab70.zip qemu-0b57c8160a2a6c833cfb1d958f08385c4391ab70.tar.gz qemu-0b57c8160a2a6c833cfb1d958f08385c4391ab70.tar.bz2 | |
docs/system/i386: xenpvh: Add a basic description
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/system/i386/xenpvh.rst | 49 | ||||
| -rw-r--r-- | docs/system/target-i386.rst | 1 |
2 files changed, 50 insertions, 0 deletions
diff --git a/docs/system/i386/xenpvh.rst b/docs/system/i386/xenpvh.rst new file mode 100644 index 0000000..354250f --- /dev/null +++ b/docs/system/i386/xenpvh.rst @@ -0,0 +1,49 @@ +Xen PVH machine (``xenpvh``) +========================================= + +Xen supports a spectrum of types of guests that vary in how they depend +on HW virtualization features, emulation models and paravirtualization. +PVH is a mode that uses HW virtualization features (like HVM) but tries +to avoid emulation models and instead use passthrough or +paravirtualized devices. + +QEMU can be used to provide PV virtio devices on an emulated PCIe controller. +That is the purpose of this minimal machine. + +Supported devices +----------------- + +The x86 Xen PVH QEMU machine provide the following devices: + +- RAM +- GPEX host bridge +- virtio-pci devices + +The idea is to only connect virtio-pci devices but in theory any compatible +PCI device model will work depending on Xen and guest support. + +Running +------- + +The Xen tools will typically construct a command-line and launch QEMU +for you when needed. But here's an example of what it can look like in +case you need to construct one manually: + +.. code-block:: console + + qemu-system-i386 -xen-domid 3 -no-shutdown \ + -chardev socket,id=libxl-cmd,path=/var/run/xen/qmp-libxl-3,server=on,wait=off \ + -mon chardev=libxl-cmd,mode=control \ + -chardev socket,id=libxenstat-cmd,path=/var/run/xen/qmp-libxenstat-3,server=on,wait=off \ + -mon chardev=libxenstat-cmd,mode=control \ + -nodefaults \ + -no-user-config \ + -xen-attach -name g0 \ + -vnc none \ + -display none \ + -device virtio-net-pci,id=nic0,netdev=net0,mac=00:16:3e:5c:81:78 \ + -netdev type=tap,id=net0,ifname=vif3.0-emu,br=xenbr0,script=no,downscript=no \ + -smp 4,maxcpus=4 \ + -nographic \ + -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 \ + -m 4096 diff --git a/docs/system/target-i386.rst b/docs/system/target-i386.rst index 1b8a1f2..23e84e3 100644 --- a/docs/system/target-i386.rst +++ b/docs/system/target-i386.rst @@ -26,6 +26,7 @@ Architectural features i386/cpu i386/hyperv i386/xen + i386/xenpvh i386/kvm-pv i386/sgx i386/amd-memory-encryption |