Bug 1472131
| Summary: | Guest OS will down when disk enable the IOMMU for Virtio | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Oneata Mircea Teodor <toneata> |
| Component: | seabios | Assignee: | jason wang <jasowang> |
| Status: | CLOSED ERRATA | QA Contact: | FuXiangChun <xfu> |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | 7.4 | CC: | ailan, chayang, coli, dyuan, jasowang, jherrman, jishao, juzhang, knoel, michen, mrezanin, mtessun, pezhang, virt-maint, xuzhang, yalzhang |
| Target Milestone: | rc | Keywords: | ZStream |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | seabios-1.10.2-4.el7 | Doc Type: | Bug Fix |
| Doc Text: |
Previously, after enabling the Input/Output Memory Management Unit (IOMMU) for a Q35 machine type guest, the guest failed to boot and displayed a "No bootable device" error message. This update fixes the handling of IOMMU on Q35 guests, and the described problem no longer occurs.
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Story Points: | --- |
| Clone Of: | 1463163 | Environment: | |
| Last Closed: | 2017-09-05 11:23:01 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1463163 | ||
| Bug Blocks: | |||
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Description
Oneata Mircea Teodor
2017-07-18 06:51:01 UTC
Fix included in seabios-1.10.2-4.el7 1)Reproduced bug with: seabios-1.10.2-3.el7 3.10.0-693.el7.x86_64 qemu-kvm-rhev-2.9.0-16.el7_4.3.x86_64 cli: /usr/libexec/qemu-kvm -M pc -cpu host -enable-kvm -m 2G -smp 4 -nodefconfig -rtc base=localtime,driftfix=slew -device virtio-scsi-pci,iommu_platform=on,id=scsi0,disable-legacy=on,disable-modern=off -drive file=/home/rhel74-64-virtio.qcow2,format=qcow2,if=none,id=drive-scsi0-0-0-0 -device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=1 -vnc :1 -monitor stdio result: Boot failed: could not read the boot disk 2)Verified bug with: seabios-1.10.2-4.el7_4.x86_64 3.10.0-693.el7.x86_64 qemu-kvm-rhev-2.9.0-16.el7_4.3.x86_64 steps: 1. In host, add "iommu=pt intel_iommu=on" to kernel line 2. Add "intel_iommu=on" to kernel line of q35/pc guest 3. boot virtio-scsi with iommu_platform=on result: Guest works well Additional I tested device 'virtio-blk-pci' and machine type pc/q35 as well. Guest still works well. Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2017:2567 *** Bug 1482387 has been marked as a duplicate of this bug. *** |