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Re: [PATCH 00/15] s390x: Protected Virtualization support

From: Daniel P . Berrangé
Subject: Re: [PATCH 00/15] s390x: Protected Virtualization support
Date: Fri, 29 Nov 2019 11:08:20 +0000
User-agent: Mutt/1.12.1 (2019-06-15)

On Wed, Nov 20, 2019 at 06:43:19AM -0500, Janosch Frank wrote:
> Most of the QEMU changes for PV are related to the new IPL type with
> subcodes 8 - 10 and the execution of the necessary Ultravisor calls to
> IPL secure guests. Note that we can only boot into secure mode from
> normal mode, i.e. stfle 161 is not active in secure mode.
> The other changes related to data gathering for emulation and
> disabling addressing checks in secure mode, as well as CPU resets.
> While working on this I sprinkled in some cleanups, as we sometimes
> significantly increase line count of some functions and they got
> unreadable.

Can you give some guidance on how management applications including
libvirt & layers above (oVirt, OpenStack, etc) would/should use this
feature ?  What new command line / monitor calls are needed, and
what feature restrictions are there on its use ?

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