https://bugzilla.kernel.org/show_bug.cgi?id=116611 Bug ID: 116611 Summary: scsi-block passthrough breaks with external pci-express SATA controller Product: Virtualization Version: unspecified Kernel Version: 4.4 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: kvm Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx Reporter: mutedbytes@xxxxxxxxx Regression: No My hardware provides 6 SATA ports directly from Intel Z97 chipset, and 2 additional SATA ports from a Marvell 88SE9172 attached to the Z97 PCI-e bus. A physical block device attached directly to the chipset ports can successfully be passed through using virtio-scsi-pci controller and scsi-block device to Windows 8/8.1/10 guest using qemu 2.5. However, attaching the same physical drive to the Marvell controller results in missing drives or weird/corrupted behavior in the guest when attempting to perform the same passthrough (for example, no hard drives are found during guest installation procedure after loading virtio drivers). This seems to have broken somewhere in 4.2 or later, as it works fine as expected in 4.1. The broken behavior appears in 4.4 and 4.5, though I have not been able to test 4.2 and 4.3. -- 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
