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[Qemu-devel] [PATCH 6/8] i386/kvm: hv-stimer requires hv-time and hv-syn


From: Divya Garg
Subject: [Qemu-devel] [PATCH 6/8] i386/kvm: hv-stimer requires hv-time and hv-synic
Date: Tue, 12 Apr 2022 16:34:00 +0530
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.7.0

Hi Vitaly Kuznetsov !
I was working on hyperv flags and saw that we introduced new dependencies some time back (https://sourcegraph.com/github.com/qemu/qemu/-/commit/c686193072a47032d83cb4e131dc49ae30f9e5d7?visible=1).
After these changes, if we try to live migrate a vm from older qemu to newer
one having these changes, it fails showing dependency issue.

I was wondering if this is the expected behaviour or if there is any work
around for handing it ? Or something needs to be done to ensure backward
compatibility ?

Thankyou
Regards
Divya Garg



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