Re: [PATCH 3/6] qemu: check if AMD secure guest support is enabled

>> 3) Check if Qemu supports SEV feature (maybe we can detect the existence >> of the query-sev QMP command or detect Qemu version >= 2.12) ^This is already achieved by qemuMonitorJSONGetSEVCapabilities > The idea is to check the host capabilities to detect if qemus capabilities > need to be reprobed. Therefore this would be a result if checks 1+2 change > but it would not be a cache invalidation trigger. I agree in the sense that the SEV support that is currently being reported in QEMU capabilities wasn't a good choice because it reports only platform data which are constant to the host and have nothing to do with QEMU. It would be okay to just say <sev supported="yes|no"/> in qemu capabilities and report the rest in host capabilities. I haven't added this info into host capabilities when I realized the mistake because I didn't want to duplicate the platform info on 2 places. For the IBM secure guest feature, it makes total sense to report support within host capabilities, I'm just not sure whether we should do the same for SEV and try really hard to "fix" the mess.