[libvirt] [PATCH V2 5/6] xenconfig: support bios=ovmf xl.cfg
Jim Fehlig
jfehlig at suse.com
Thu Jun 9 17:06:11 UTC 2016
Michal Privoznik wrote:
> On 09.06.2016 16:46, Jim Fehlig wrote:
>> Add support to xenconfig for conversion of xl.cfg(5) bios config
>> to/from libvirt domXml <loader> config. SeaBIOS is the default
>> for HVM guests using upstream QEMU. ROMBIOS is the default when
>> using the old qemu-dm. This patch allows specifying OVMF as an
>> alternate firmware.
>>
>> Example xl.cfg:
>> bios = "ovmf"
>>
>> Example domXML:
>> <os>
>> ...
>> <loader readonly='yes' type='pflash'>/usr/lib/xen/boot/ovmf.bin</loader>
>> </os>
>>
>> An alternate OVMF firmware (from the one advertised in
>> domaincapabilities) can be specified with
>>
>> bios = "ovmf"
>> bios_override = "/path/to/my/ovmf.bin"
>>
>> Note that currently, Xen does not support a separate nvram for
>> non-volatile variables.
>>
>> Signed-off-by: Jim Fehlig <jfehlig at suse.com>
>> ---
>> src/Makefile.am | 2 +-
>> src/xenconfig/xen_xl.c | 50 ++++++++++++++++---
>> tests/xlconfigdata/test-fullvirt-ovmf-override.cfg | 27 ++++++++++
>> tests/xlconfigdata/test-fullvirt-ovmf-override.xml | 58 ++++++++++++++++++++++
>> tests/xlconfigdata/test-fullvirt-ovmf.cfg | 26 ++++++++++
>> tests/xlconfigdata/test-fullvirt-ovmf.xml | 58 ++++++++++++++++++++++
>> tests/xlconfigtest.c | 2 +
>> 7 files changed, 216 insertions(+), 7 deletions(-)
>>
>
> Looking good, but just one small nit.
>
>> diff --git a/src/xenconfig/xen_xl.c b/src/xenconfig/xen_xl.c
>> index 9b8306f..bbe53ee 100644
>> --- a/src/xenconfig/xen_xl.c
>> +++ b/src/xenconfig/xen_xl.c
>
>
>> @@ -535,6 +561,18 @@ xenFormatXLOS(virConfPtr conf, virDomainDefPtr def)
>> if (xenConfigSetString(conf, "builder", "hvm") < 0)
>> return -1;
>>
>> + if (def->os.loader &&
>> + def->os.loader->type == VIR_DOMAIN_LOADER_TYPE_PFLASH) {
>> + if (xenConfigSetString(conf, "bios", "ovmf") < 0)
>> + return -1;
>> +
>> + if (STRNEQ(def->os.loader->path, LIBXL_FIRMWARE_DIR "/ovmf.bin")) {
>
> On my system LIBXL_FIRMWARE_DIR is:
>
> $ pkg-config --variable=xenfirmwaredir xenlight
> /usr/libexec/xen/boot
>
>> + if (xenConfigSetString(conf, "bios_override",
>> + def->os.loader->path) < 0)
>
> and since "bios_override" is set only if it points somewhere else ...
>
>> + return -1;
>> + }
>> + }
>> +
>> #ifdef LIBXL_HAVE_BUILDINFO_KERNEL
>> if (def->os.kernel &&
>> xenConfigSetString(conf, "kernel", def->os.kernel) < 0)
>> diff --git a/tests/xlconfigdata/test-fullvirt-ovmf-override.cfg b/tests/xlconfigdata/test-fullvirt-ovmf-override.cfg
>> new file mode 100644
>> index 0000000..46bd684
>> --- /dev/null
>> +++ b/tests/xlconfigdata/test-fullvirt-ovmf-override.cfg
>> @@ -0,0 +1,27 @@
>> +name = "XenGuest2"
>> +uuid = "c7a5fdb2-cdaf-9455-926a-d65c16db1809"
>> +maxmem = 579
>> +memory = 394
>> +vcpus = 1
>> +pae = 1
>> +acpi = 1
>> +apic = 1
>> +viridian = 0
>> +rtc_timeoffset = 0
>> +localtime = 0
>> +on_poweroff = "destroy"
>> +on_reboot = "restart"
>> +on_crash = "restart"
>> +device_model = "/usr/lib/xen/bin/qemu-dm"
>> +sdl = 0
>> +vnc = 1
>> +vncunused = 1
>> +vnclisten = "127.0.0.1"
>> +vif = [ "mac=00:16:3e:66:92:9c,bridge=xenbr1,script=vif-bridge,model=e1000" ]
>> +parallel = "none"
>> +serial = "none"
>> +builder = "hvm"
>> +bios = "ovmf"
>> +bios_override = "/usr/share/qemu/ovmf-x86_64.bin"
>> +boot = "d"
>> +disk = [ "format=raw,vdev=hda,access=rw,backendtype=phy,target=/dev/HostVG/XenGuest2", "format=qcow2,vdev=hdb,access=rw,backendtype=qdisk,target=/var/lib/libvirt/images/XenGuest2-home", "format=raw,vdev=hdc,access=ro,backendtype=qdisk,devtype=cdrom,target=/root/boot.iso" ]
>> diff --git a/tests/xlconfigdata/test-fullvirt-ovmf-override.xml b/tests/xlconfigdata/test-fullvirt-ovmf-override.xml
>> new file mode 100644
>> index 0000000..435a791
>> --- /dev/null
>> +++ b/tests/xlconfigdata/test-fullvirt-ovmf-override.xml
>> @@ -0,0 +1,58 @@
>> +<domain type='xen'>
>> + <name>XenGuest2</name>
>> + <uuid>c7a5fdb2-cdaf-9455-926a-d65c16db1809</uuid>
>> + <memory unit='KiB'>592896</memory>
>> + <currentMemory unit='KiB'>403456</currentMemory>
>> + <vcpu placement='static'>1</vcpu>
>> + <os>
>> + <type arch='x86_64' machine='xenfv'>hvm</type>
>> + <loader readonly='yes' type='pflash'>/usr/share/qemu/ovmf-x86_64.bin</loader>
>> + <boot dev='cdrom'/>
>> + </os>
>> + <features>
>> + <acpi/>
>> + <apic/>
>> + <pae/>
>> + </features>
>> + <clock offset='variable' adjustment='0' basis='utc'/>
>> + <on_poweroff>destroy</on_poweroff>
>> + <on_reboot>restart</on_reboot>
>> + <on_crash>restart</on_crash>
>> + <devices>
>> + <emulator>/usr/lib/xen/bin/qemu-dm</emulator>
>> + <disk type='block' device='disk'>
>> + <driver name='phy' type='raw'/>
>> + <source dev='/dev/HostVG/XenGuest2'/>
>> + <target dev='hda' bus='ide'/>
>> + <address type='drive' controller='0' bus='0' target='0' unit='0'/>
>> + </disk>
>> + <disk type='file' device='disk'>
>> + <driver name='qemu' type='qcow2'/>
>> + <source file='/var/lib/libvirt/images/XenGuest2-home'/>
>> + <target dev='hdb' bus='ide'/>
>> + <address type='drive' controller='0' bus='0' target='0' unit='1'/>
>> + </disk>
>> + <disk type='file' device='cdrom'>
>> + <driver name='qemu' type='raw'/>
>> + <source file='/root/boot.iso'/>
>> + <target dev='hdc' bus='ide'/>
>> + <readonly/>
>> + <address type='drive' controller='0' bus='1' target='0' unit='0'/>
>> + </disk>
>> + <controller type='ide' index='0'/>
>> + <interface type='bridge'>
>> + <mac address='00:16:3e:66:92:9c'/>
>> + <source bridge='xenbr1'/>
>> + <script path='vif-bridge'/>
>> + <model type='e1000'/>
>> + </interface>
>> + <input type='mouse' bus='ps2'/>
>> + <input type='keyboard' bus='ps2'/>
>> + <graphics type='vnc' port='-1' autoport='yes' listen='127.0.0.1'>
>> + <listen type='address' address='127.0.0.1'/>
>> + </graphics>
>> + <video>
>> + <model type='cirrus' vram='8192' heads='1' primary='yes'/>
>> + </video>
>> + </devices>
>> +</domain>
>> diff --git a/tests/xlconfigdata/test-fullvirt-ovmf.cfg b/tests/xlconfigdata/test-fullvirt-ovmf.cfg
>> new file mode 100644
>> index 0000000..af0735e
>> --- /dev/null
>> +++ b/tests/xlconfigdata/test-fullvirt-ovmf.cfg
>> @@ -0,0 +1,26 @@
>> +name = "XenGuest2"
>> +uuid = "c7a5fdb2-cdaf-9455-926a-d65c16db1809"
>> +maxmem = 579
>> +memory = 394
>> +vcpus = 1
>> +pae = 1
>> +acpi = 1
>> +apic = 1
>> +viridian = 0
>> +rtc_timeoffset = 0
>> +localtime = 0
>> +on_poweroff = "destroy"
>> +on_reboot = "restart"
>> +on_crash = "restart"
>> +device_model = "/usr/lib/xen/bin/qemu-dm"
>> +sdl = 0
>> +vnc = 1
>> +vncunused = 1
>> +vnclisten = "127.0.0.1"
>> +vif = [ "mac=00:16:3e:66:92:9c,bridge=xenbr1,script=vif-bridge,model=e1000" ]
>> +parallel = "none"
>> +serial = "none"
>> +builder = "hvm"
>> +bios = "ovmf"
>
> I have got:
>
> bios_override = "/usr/lib/xen/boot/ovmf.bin"
Actually, I need to remove handling of bios_override since that config item is
part of Anthony's "Load BIOS via toolstack instead of been embedded in
hvmloader" series that is not yet committed to xen.git. Specifically, it is
introduced in 5/14 here
http://lists.xen.org/archives/html/xen-devel/2016-03/msg01628.html
>
> here. And thus the test fails for me. I'm not sure how test what you're
> trying to test here though.
You bring up a point here that I'm not quite sure how to handle.
LIBXL_FIRMWARE_DIR can certainly be different between Xen installations,
depending on configuration options selected when building Xen. But currently all
the various data files under tests/ are "hard-coded". E.g.
tests/xlconfigdata/test-fullvirt-ovmf.xml introduced in this patch contains
<loader readonly='yes' type='pflash'>/usr/lib/xen/boot/ovmf.bin</loader>
but it should really contain
<loader readonly='yes' type='pflash'>LIBXL_FIRMWARE_DIR/ovmf.bin</loader>
How should test data files which depend on values discovered at build time be
handled? Should they be created at build time from e.g.
tests/xlconfigdata/test-fullvirt-ovmf.xml.in? Is there a better trick for
substituting values discovered at build time in test data files?
Thanks a lot for taking a look at this work!
Regards,
Jim
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