[libvirt] [PATCH v3 00/12] PCI passthrough support on s390
Yi Min Zhao
zyimin at linux.ibm.com
Mon Aug 13 04:46:16 UTC 2018
Is there any comment? I expect comments from all of you.
在 2018/8/7 下午5:10, Yi Min Zhao 写道:
> Abstract
> ========
> The PCI representation in QEMU has recently been extended for S390
> allowing configuration of zPCI attributes like uid (user-defined
> identifier) and fid (PCI function identifier).
> The details can be found here:
> https://lists.gnu.org/archive/html/qemu-devel/2016-06/msg07262.html
>
> To support the new zPCI feature of the S390 platform, two new XML
> attributes, @uid and @fid, are introduced for device addresses of type
> 'pci', i.e.:
> <hostdev mode='subsystem' type='pci'>
> <driver name='vfio'/>
> <source>
> <address domain='0x0001' bus='0x00' slot='0x00' function='0x0'/>
> </source>
> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'
> uid='0x0003' fid='0x00000027'/>
> </hostdev>
>
> uid and fid are optional attributes. If they are defined by the user,
> unique values within the guest domain must be used. If they are not
> specified and the architecture requires them, they are automatically
> generated with non-conflicting values.
>
> Current implementation is the most seamless one for the user as it
> unites the address specific data of a PCI device on one XML element.
> It could accommodate both specifying our special parameters (uid and fid)
> and re-using standard statements (domain, bus, slot and function) for
> PCI devices. User can still specify bus/slot/function for the virtualized
> PCI devices in the XML.
>
> Thus uid/fid act as an extension to the PCI address and are stored in
> a new structure 'virZPCIDeviceAddress' which is a member of common PCI
> Address structure. Additionally, two hashtables are used for assignment
> and reservation of uid/fid.
>
> In support of extending the PCI address, a new PCI address extension flag is
> introduced. This extension flag allows is not only dedicated for the S390
> platform but also other architectures needing certain extensions to PCI
> address space.
>
> Code Base
> =========
> commit in master:
> 087de2f5a3: docs: formatdomain: fix spacing before parentheses
>
> Change Log
> ==========
> v2->v3:
> 1. Revise code style.
> 2. Update test cases.
> 3. Introduce qemuDomainCollectPCIAddressExtension() to collect PCI
> extension addresses.
> 4. Introduce virDeviceInfoPCIAddressExtensionPresent() to check if zPCI
> address exists.
> 5. Optimize zPCI address check logic.
> 6. Optimize passed parameters of zPCI addr alloc/release/reserve functions.
> 7. Report enum range error in qemuDomainDeviceSupportZPCI().
> 8. Update commit messages.
>
> v1->v2:
> 1. Separate test commit and merge testcases into corresponding commits that
> introduce the functionalities firstly.
> 2. Spare some checks for zpci device.
> 3. Add vsock and controller support.
> 4. Add uin32 type schema.
> 5. Rename zpciuid and zpcifid to zpci_uid and zpci_fid.
> 6. Always return multibus support on S390.
>
> Yi Min Zhao (12):
> conf: Add definitions for 'uid' and 'fid' PCI address attributes
> qemu: Introduce zPCI capability
> conf: Introduce a new PCI address extension flag
> qemu: Enable PCI multi bus for S390 guests
> qemu: Auto add pci-root for s390/s390x guests
> conf: Introduce address caching for PCI extensions
> conf: Introduce parser, formatter for uid and fid
> conf: Allocate/release 'uid' and 'fid' in PCI address
> qemu: Generate and use zPCI device in QEMU command line
> qemu: Add hotpluging support for PCI devices on S390 guests
> docs: Add 'uid' and 'fid' information
> news: Update news for PCI address extension attributes
>
> docs/formatdomain.html.in | 9 +-
> docs/news.xml | 11 +
> docs/schemas/basictypes.rng | 23 ++
> docs/schemas/domaincommon.rng | 1 +
> src/conf/device_conf.c | 78 +++++
> src/conf/device_conf.h | 8 +
> src/conf/domain_addr.c | 379 +++++++++++++++++++++
> src/conf/domain_addr.h | 29 ++
> src/conf/domain_conf.c | 6 +
> src/libvirt_private.syms | 4 +
> src/qemu/qemu_capabilities.c | 6 +
> src/qemu/qemu_capabilities.h | 1 +
> src/qemu/qemu_command.c | 114 +++++++
> src/qemu/qemu_command.h | 4 +
> src/qemu/qemu_domain.c | 1 +
> src/qemu/qemu_domain_address.c | 204 ++++++++++-
> src/qemu/qemu_hotplug.c | 155 ++++++++-
> src/util/virpci.h | 13 +
> tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml | 1 +
> tests/qemucapabilitiesdata/caps_2.11.0.s390x.xml | 1 +
> tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml | 1 +
> tests/qemucapabilitiesdata/caps_2.7.0.s390x.xml | 1 +
> tests/qemucapabilitiesdata/caps_2.8.0.s390x.xml | 1 +
> tests/qemucapabilitiesdata/caps_2.9.0.s390x.xml | 1 +
> tests/qemuxml2argvdata/disk-virtio-s390-zpci.args | 27 ++
> tests/qemuxml2argvdata/disk-virtio-s390-zpci.xml | 17 +
> .../hostdev-vfio-zpci-autogenerate.args | 26 ++
> .../hostdev-vfio-zpci-autogenerate.xml | 18 +
> .../hostdev-vfio-zpci-boundaries.args | 30 ++
> .../hostdev-vfio-zpci-boundaries.xml | 26 ++
> .../hostdev-vfio-zpci-multidomain-many.args | 40 +++
> .../hostdev-vfio-zpci-multidomain-many.xml | 67 ++++
> tests/qemuxml2argvdata/hostdev-vfio-zpci.args | 26 ++
> tests/qemuxml2argvdata/hostdev-vfio-zpci.xml | 19 ++
> tests/qemuxml2argvtest.c | 17 +
> tests/qemuxml2xmloutdata/disk-virtio-s390-zpci.xml | 29 ++
> .../hostdev-vfio-zpci-autogenerate.xml | 30 ++
> .../hostdev-vfio-zpci-boundaries.xml | 42 +++
> .../hostdev-vfio-zpci-multidomain-many.xml | 79 +++++
> tests/qemuxml2xmloutdata/hostdev-vfio-zpci.xml | 30 ++
> tests/qemuxml2xmltest.c | 14 +
> 41 files changed, 1575 insertions(+), 14 deletions(-)
> create mode 100644 tests/qemuxml2argvdata/disk-virtio-s390-zpci.args
> create mode 100644 tests/qemuxml2argvdata/disk-virtio-s390-zpci.xml
> create mode 100644 tests/qemuxml2argvdata/hostdev-vfio-zpci-autogenerate.args
> create mode 100644 tests/qemuxml2argvdata/hostdev-vfio-zpci-autogenerate.xml
> create mode 100644 tests/qemuxml2argvdata/hostdev-vfio-zpci-boundaries.args
> create mode 100644 tests/qemuxml2argvdata/hostdev-vfio-zpci-boundaries.xml
> create mode 100644 tests/qemuxml2argvdata/hostdev-vfio-zpci-multidomain-many.args
> create mode 100644 tests/qemuxml2argvdata/hostdev-vfio-zpci-multidomain-many.xml
> create mode 100644 tests/qemuxml2argvdata/hostdev-vfio-zpci.args
> create mode 100644 tests/qemuxml2argvdata/hostdev-vfio-zpci.xml
> create mode 100644 tests/qemuxml2xmloutdata/disk-virtio-s390-zpci.xml
> create mode 100644 tests/qemuxml2xmloutdata/hostdev-vfio-zpci-autogenerate.xml
> create mode 100644 tests/qemuxml2xmloutdata/hostdev-vfio-zpci-boundaries.xml
> create mode 100644 tests/qemuxml2xmloutdata/hostdev-vfio-zpci-multidomain-many.xml
> create mode 100644 tests/qemuxml2xmloutdata/hostdev-vfio-zpci.xml
>
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