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Re: [PATCH v4 14/14] xen/arm64: smpboot: Directly switch to the runtime page-tables
- To: Julien Grall <julien@xxxxxxx>
- From: Luca Fancellu <Luca.Fancellu@xxxxxxx>
- Date: Fri, 13 Jan 2023 17:42:49 +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 17:43:23 +0000
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- Thread-topic: [PATCH v4 14/14] xen/arm64: smpboot: Directly switch to the runtime page-tables
> On 13 Jan 2023, at 10:11, Julien Grall <julien@xxxxxxx> wrote:
>
> From: Julien Grall <jgrall@xxxxxxxxxx>
>
> Switching TTBR while the MMU is on is not safe. Now that the identity
> mapping will not clash with the rest of the memory layout, we can avoid
> creating temporary page-tables every time a CPU is brought up.
>
> The arm32 code will use a different approach. So this issue is for now
> only resolved on arm64.
>
> Signed-off-by: Julien Grall <jgrall@xxxxxxxxxx>
> ----
> Changes in v4:
> - Somehow I forgot to send it in v3. So re-include it.
>
> Changes in v2:
> - Remove arm32 code
> ---
Reviewed-by: Luca Fancellu <luca.fancellu@xxxxxxx>
I’ve also built for arm32/64 and test this patch (so this serie) on fvp, n1sdp,
raspberry pi4, Juno,
booting Dom0 and creating/running/destroying some guests, on a first shot
everything works.
Tested-by: Luca Fancellu <luca.fancellu@xxxxxxx>
I’ve left the boards to test all night, so on Monday I will be 100% sure this
serie
Is not introducing any issue.
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