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Re: [PATCH v4 10/14] xen/arm32: head: Widen the use of the temporary mapping
- To: Julien Grall <julien@xxxxxxx>
- From: Luca Fancellu <Luca.Fancellu@xxxxxxx>
- Date: Fri, 13 Jan 2023 15:37:41 +0000
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- Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Julien Grall <jgrall@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Bertrand Marquis <Bertrand.Marquis@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Fri, 13 Jan 2023 15:38:09 +0000
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- Thread-topic: [PATCH v4 10/14] xen/arm32: head: Widen the use of the temporary mapping
> On 13 Jan 2023, at 10:11, Julien Grall <julien@xxxxxxx> wrote:
>
> From: Julien Grall <jgrall@xxxxxxxxxx>
>
> At the moment, the temporary mapping is only used when the virtual
> runtime region of Xen is clashing with the physical region.
>
> In follow-up patches, we will rework how secondary CPU bring-up works
> and it will be convenient to use the fixmap area for accessing
> the root page-table (it is per-cpu).
>
> Rework the code to use temporary mapping when the Xen physical address
> is not overlapping with the temporary mapping.
>
> This also has the advantage to simplify the logic to identity map
> Xen.
>
> Signed-off-by: Julien Grall <jgrall@xxxxxxxxxx>
>
> ----
Reviewed-by: Luca Fancellu <luca.fancellu@xxxxxxx>
I’ve also built for arm32 and test this patch on fvp aarch32 mode,
booting Dom0 and creating/running/destroying some guests
Tested-by: Luca Fancellu <luca.fancellu@xxxxxxx>
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