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Re: [XEN PATCH v1 1/1] x86/domctl: add gva_to_gfn command
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 21 Mar 2023 08:28:42 +0100
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- Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Tamas K Lengyel <tamas@xxxxxxxxxxxxx>, Dmitry Isaykin <isaikin-dmitry@xxxxxxxxx>, Ковалёв Сергей <valor@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 21 Mar 2023 07:28:57 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 20.03.2023 20:07, Andrew Cooper wrote:
> On 20/03/2023 4:32 pm, Ковалёв Сергей wrote:
>> gva_to_gfn command used for fast address translation in LibVMI project.
>> With such a command it is possible to perform address translation in
>> single call instead of series of queries to get every page table.
>>
>> Thanks to Dmitry Isaykin for involvement.
>>
>> Signed-off-by: Sergey Kovalev <valor@xxxxxxx>
>
> I fully appreciate why you want this hypercall, and I've said several
> times that libvmi wants something better than it has, but...
But is a domctl really the right vehicle? While not strictly intended for
device models, a dm-op would seem more suitable to me. Considering you
already brought altp2m into play, it could also be a sub-op of HVMOP_altp2m.
Jan
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