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Re: [PATCH v3 09/52] xen/arm: use PA == VA for EARLY_UART_VIRTUAL_ADDRESS on MPU systems

To: Penny Zheng <Penny.Zheng@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
From: Julien Grall <julien@xxxxxxx>
Date: Tue, 4 Jul 2023 20:25:11 +0100
Cc: Wei Chen <wei.chen@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
Delivery-date: Tue, 04 Jul 2023 19:25:14 +0000
List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

Hi Penny,

On 26/06/2023 04:34, Penny Zheng wrote:

From: Wei Chen <wei.chen@xxxxxxx>

There is no VMSA support on MPU systems, so we can not map early
UART to FIXMAP_CONSOLE. In stead, we can use PA == VA for early
UART on MPU systems.

Signed-off-by: Wei Chen <wei.chen@xxxxxxx>
Signed-off-by: Penny Zheng <penny.zheng@xxxxxxx>

Is this change necessary for the MMU split? If not, I will skip thereview for now.


Cheers,

--
Julien Grall

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