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Re: [PATCH 6/9] vpci/header: Handle p2m range sets per BAR
- To: Oleksandr Andrushchenko <andr2000@xxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 6 Sep 2021 16:47:46 +0200
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- Cc: julien@xxxxxxx, sstabellini@xxxxxxxxxx, oleksandr_tyshchenko@xxxxxxxx, volodymyr_babchuk@xxxxxxxx, Artem_Mygaiev@xxxxxxxx, roger.pau@xxxxxxxxxx, bertrand.marquis@xxxxxxx, rahul.singh@xxxxxxx, Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 06 Sep 2021 14:47:56 +0000
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On 03.09.2021 12:08, Oleksandr Andrushchenko wrote:
> From: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
>
> Instead of handling a single range set, that contains all the memory
> regions of all the BARs and ROM, have them per BAR.
Without looking at how you carry out this change - this look wrong (as
in: wasteful) to me. Despite ...
> This is in preparation of making non-identity mappings in p2m for the
> MMIOs/ROM.
... the need for this, every individual BAR is still contiguous in both
host and guest address spaces, so can be represented as a single
(start,end) tuple (or a pair thereof, to account for both host and guest
values). No need to use a rangeset for this.
Jan
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