[libvirt] [PATCH] qemu: Give hint about -noTSX CPU model

Eric Blake eblake at redhat.com
Wed Mar 25 16:37:46 UTC 2015


On 03/24/2015 07:20 AM, Jiri Denemark wrote:
> Because of the microcode update to Haswell/Broadwell CPUs, existing
> domains using these CPUs may fail to start even though they used to run
> just fine. To help users solve this issue we try to suggest switching to
> -noTSX variant of the CPU model:
> 
>     virsh # start cd
>     error: Failed to start domain cd
>     error: unsupported configuration: guest and host CPU are not
>     compatible: Host CPU does not provide required features: rtm, hle;
>     try using 'Haswell-noTSX' CPU model

Definitely worth this hint, as a lot of people are being bitten by it
according to bugzilla traffic.

> 
> Signed-off-by: Jiri Denemark <jdenemar at redhat.com>
> ---
> 
> This patch depends on the previous patch which introduces the new
> *-noTSX models.
> 
>  src/qemu/qemu_command.c | 38 +++++++++++++++++++++++++++++++++-----
>  1 file changed, 33 insertions(+), 5 deletions(-)

ACK.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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