https://bugzilla.kernel.org/show_bug.cgi?id=83381 Bug ID: 83381 Summary: 4-ports 82576 detect 2 ports when add "intel_iommu=on pci=assign-busses". Product: Virtualization Version: unspecified Kernel Version: 3.17.0-rc1 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: kvm Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx Reporter: chao.zhou@xxxxxxxxx Regression: No Environment: ------------ Host OS (ia32/ia32e/IA64):ia32e Guest OS (ia32/ia32e/IA64):ia32e Guest OS Type (Linux/Windows):linux kvm.git Commit:54ad89b05ec49b90790de814647b244d3d2cc5ca qemu.git Commit:c47c61be8dcd91689c8fc77776db924d684c3b39 Host Kernel Version:3.17.0-rc1 Hardware:HSW-Desktop Bug detailed description: -------------------------- the 4-ports 82576 can detect 2 ports when add "intel_iommu=on pci=assign-busses" in kernel of grub. the 4-ports 82576 can detect 4 ports without "intel_iommu=on pci=assign-busses" when add "intel_iommu=on", 4-ports 82576 detected 4 ports. when add "pci=assign-busses" ,the 4-ports 82576 can detect 2 ports. note: kernel version: 3.0.0+ (kvm+qemu-kvm:e72ef590_fda19064) 1.the 4-ports 82576 can detect 4 ports when add "intel_iommu=on pci=assign-busses". 2. when add "intel_iommu=on" or "pci=assign-busses" to boot the system, 4-ports 82576 detected 4 ports Reproduce steps: ---------------- 1. add "intel_iommu=on pci=assign-busses" in kernel of grub 2. boot up the system 3. lspci | grep Eth Current result: ---------------- 4-ports 82576 detect 2 ports Expected result: ---------------- 4-ports 82576 detect 4 ports Basic root-causing log: ---------------------- -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
