Re: [Xen-devel] [PATCH] x86: Convert shadow-paging to Kconfig

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 19/01/16 13:46, Tim Deegan wrote:
> At 09:46 +0000 on 19 Jan (1453196796), Ian Campbell wrote:
>> On Mon, 2016-01-18 at 18:40 +0000, Andrew Cooper wrote:
>>> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
>> Does this have any impact on migration of either PV or HVM guests? What
>> about nested virt?
> Without shadow paging you can't do live migration of PV guests.  That
> should go in the kconfig description. 
>
> AFAICT nested virt depends on HAP rather than shadow.

Nothing currently enforces this.  Xen dies particularly quickly with
spinlock contention if a shadow HVM guest tries to use nested-virt.

(Just another item on the long list of tasks requires before nested-virt
becomes anything other than experimental.)

~Andrew

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