2010/2/1 Daniel P. Berrange <berrange@redhat.com>:
The current QEMU code allocates PCI addresses incrementally starting at 4. This is not satisfactory because the user may have given some addresses in their XML config, which need to be skipped over when allocating addresses to remaining devices.
It is thus neccessary to maintain a list of already allocated PCI addresses and then only allocate ones that remain unused. This is also required for domain device hotplug to work properly later.
* src/qemu/qemu_conf.c, src/qemu/qemu_conf.h: Add APIs for creating list of existing PCI addresses, and allocating new addresses. Refactor address assignment to use this code * src/qemu/qemu_driver.c: Pull PCI address assignment up into the qemuStartVMDaemon() method, as a prelude to moving it into the 'define' method. Update list of allocated addresses when connecting to a running VM at daemon startup. * tests/qemuxml2argvtest.c, tests/qemuargv2xmltest.c, tests/qemuxml2xmltest.c: Remove USB product test since all passthrough is done based on address * tests/qemuxml2argvdata/qemuxml2argv-hostdev-usb-product.args, tests/qemuxml2argvdata/qemuxml2argv-hostdev-usb-product.xml: Kil unused data files ---
diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c index bbf49fd..9bfd181 100644 --- a/src/qemu/qemu_conf.c +++ b/src/qemu/qemu_conf.c
+ +void qemuDomainPCIAddressSetFree(qemuDomainPCIAddressSetPtr addrs) +{ + if (!addrs) + return; + + virHashFree(addrs->used, qemuDomainPCIAddressSetFreeEntry);
Maybe add addrs->used = NULL after virHashFree to prevent potential double frees or segfaults due to the dangling pointer. ACK Matthias