Bug 1801320
| Summary: | aarch64: backport query-cpu-model-expansion and adjvtime document fixes | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux Advanced Virtualization | Reporter: | Andrew Jones <drjones> |
| Component: | qemu-kvm | Assignee: | Andrew Jones <drjones> |
| qemu-kvm sub component: | CPU Models | QA Contact: | Qunfang Zhang <qzhang> |
| Status: | CLOSED ERRATA | Docs Contact: | |
| Severity: | unspecified | ||
| Priority: | unspecified | CC: | jinzhao, juzhang, qzhang, virt-maint |
| Version: | 8.2 | Keywords: | OtherQA |
| Target Milestone: | rc | Flags: | pm-rhel:
mirror+
|
| Target Release: | 8.0 | ||
| Hardware: | aarch64 | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | qemu-kvm-4.2.0-10.module+el8.2.0+5740+c3dff59e | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-05-05 09:57:11 UTC | Type: | Bug |
| 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: | 1647366 | ||
| Bug Blocks: | 1677408 | ||
Here are the testing details
Before patch
------------
<TERM_1>$ /usr/libexec/qemu-kvm -machine none,accel=kvm -qmp unix:./qmp-sock,server
<TERM_2>$ /path/to/qemu/src/scripts/qmp/qmp-shell ./qmp-sock
Welcome to the QMP low-level shell!
Connected to QEMU 4.2.0
(QEMU) query-cpu-model-expansion type=full model={"name":"cortex-a15"}
Disconnected
(And /usr/libexec/qemu-kvm in TERM_1 reports a segfault)
After patch
-----------
<TERM_1>$ /usr/libexec/qemu-kvm -machine none,accel=kvm -qmp unix:./qmp-sock,server
<TERM_2>$ /path/to/qemu/src/scripts/qmp/qmp-shell ./qmp-sock
Welcome to the QMP low-level shell!
Connected to QEMU 4.2.0
(QEMU) query-cpu-model-expansion type=full model={"name":"cortex-a15"}
{"error": {"class": "GenericError", "desc": "We cannot guarantee the CPU type 'cortex-a15' works with KVM on this host"}}
(QEMU)
(No segfault)
I've tested this as OtherQA and request that QE move the BZ to VERIFIED. See comment 2 for testing details. Thank you Andrew! As I updated in other BZs, it would be appreciated that a tested version could be mentioned for reference. :) (In reply to Qunfang Zhang from comment #7) > Thank you Andrew! As I updated in other BZs, it would be appreciated that a > tested version could be mentioned for reference. :) I tested qemu-kvm-4.2.0-12.module+el8.2.0+5858+afd073bc.aarch64 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-2020:2017 |
The SVE support added the cpu-model-expansion QMP command to AArch64. It's possible to crash QEMU with that query when KVM is enabled, 'none' is used for the machine type, and a cpu type that is not supported by KVM is queried. Backport 0999a4ba8718 ("target/arm/monitor: query-cpu-model-expansion crashed qemu when using machine type none") to fix it. We also backport a kvm-no-adjvtime document fix.