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Re: [PATCH v8 2/4] xen/arm: setup MMIO range trap handlers for hardware domain
- To: Oleksandr Andrushchenko <andr2000@xxxxxxxxx>
- From: Rahul Singh <Rahul.Singh@xxxxxxx>
- Date: Thu, 9 Dec 2021 10:18:35 +0000
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- Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, "oleksandr_tyshchenko@xxxxxxxx" <oleksandr_tyshchenko@xxxxxxxx>, "volodymyr_babchuk@xxxxxxxx" <volodymyr_babchuk@xxxxxxxx>, "artem_mygaiev@xxxxxxxx" <artem_mygaiev@xxxxxxxx>, Bertrand Marquis <Bertrand.Marquis@xxxxxxx>, Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
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- Thread-topic: [PATCH v8 2/4] xen/arm: setup MMIO range trap handlers for hardware domain
Hi Oleksandr,
> On 9 Dec 2021, at 7:29 am, Oleksandr Andrushchenko <andr2000@xxxxxxxxx> wrote:
>
> From: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
>
> In order for vPCI to work it needs to maintain guest and hardware
> domain's views of the configuration space. For example, BARs and
> COMMAND registers require emulation for guests and the guest view
> of the registers needs to be in sync with the real contents of the
> relevant registers. For that ECAM address space needs to also be
> trapped for the hardware domain, so we need to implement PCI host
> bridge specific callbacks to properly setup MMIO handlers for those
> ranges depending on particular host bridge implementation.
>
> Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
Reviewed-by: Rahul Singh <rahul.singh@xxxxxxx>
Tested-by: Rahul Singh <rahul.singh@xxxxxxx>
Regards,
Rahul
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