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由 Alex Williamson 提交于
This allows libvirt to open the PCI device sysfs config file prior to dropping privileges so qemu can access the full config space. Without this, a de-privileged qemu can only access the first 64 bytes of config space. * src/qemu/qemu_conf.c, src/qemu/qemu_conf.h: Detect support for pci-assign.configfd option. Use this option when formatting PCI device string if possible * src/qemu/qemu_driver.c: Pre-open PCI sysfs config file and pass to QEMU
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