Re: [libvirt] [PATCH 0/6] auto-assign addresses when <address type='pci'/> is specified
On 05/18/2016 03:23 PM, Laine Stump wrote:
This is an alternative to Cole's series that permits <address
type='pci'/> to force assignment of a PCI address, which is
particularly useful on platforms that could connect the same device in
different ways (e.g. aarch64/virt).
Here is Cole's last iteration of the series:
https://www.redhat.com/archives/libvir-list/2016-May/msg01088.html
I had expressed a dislike of the "auto_allocate" flag that his series
temporarily adds to the address (while simultaneously changing the
address type to NONE) and suggested just changing all the necessary
places to check for a valid PCI address instead of just checking the
address type. He replied that this wasn't as simple as it looked, so I
decided to try it; turns out he's right. But I still like this method
better because it's not playing tricks with the address type, or
adding a temporary private attribute to what should be pure config
data.
Your opinion may vary though :-)
Note that patch 5/6 incorporates the same test case that Cole used in
his penultimate patch, and I've added his patch to check the case of
aarch64 at the end as well.
ACK series, but it's missing formatdomain.html.in changes. You can grab the
check from my patch #2
I'm fine with this approach but I'll just list the downsides
- Less generalizable, for adding additional address types in the future, but
that's hypothetical at this point
- We don't raise an explicit error for drivers that don't support this type of
address allocation, like libxl. If it matters we could add a domain XML parse
feature to throw an explicit error though
- checking info->type == DEVICE_ADDRESS_TYPE_PCI is now a suspect pattern and
needs to be considered carefully in other parts of the code
upsides:
- less magic
- I think it will make allocating address at hotplug time simpler as well
Thanks,
Cole
Cole Robinson (1):
tests: qemu: test <address type='pci'/> with aarch64
Laine Stump (5):
conf: move virDomainDeviceInfo definition from domain_conf.h to
device_conf.h
conf: new functions to check if PCI address is wanted/present
conf: allow type='pci' addresses with no address attributes specified
bhyve: auto-assign addresses when <address type='pci'/> is specified
qemu: auto-assign addresses when <address type='pci'/> is specified
docs/schemas/basictypes.rng | 8 +-
src/bhyve/bhyve_device.c | 10 +-
src/conf/device_conf.c | 6 +-
src/conf/device_conf.h | 132 ++++++++++++++++++++-
src/conf/domain_addr.c | 2 +-
src/conf/domain_conf.c | 13 +-
src/conf/domain_conf.h | 129 --------------------
src/qemu/qemu_domain_address.c | 64 +++++-----
...l2argv-aarch64-virtio-pci-manual-addresses.args | 4 +-
...ml2argv-aarch64-virtio-pci-manual-addresses.xml | 5 +
.../qemuxml2argv-pci-autofill-addr.args | 25 ++++
.../qemuxml2argv-pci-autofill-addr.xml | 35 ++++++
tests/qemuxml2argvtest.c | 1 +
...2xmlout-aarch64-virtio-pci-manual-addresses.xml | 5 +
.../qemuxml2xmlout-pci-autofill-addr.xml | 41 +++++++
tests/qemuxml2xmltest.c | 1 +
16 files changed, 298 insertions(+), 183 deletions(-)
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-pci-autofill-addr.args
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-pci-autofill-addr.xml
create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-pci-autofill-addr.xml