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RE: [PATCH 1/4] xen/arm: debug-pl011: Use correct accessors
- To: Michal Orzel <michal.orzel@xxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Henry Wang <Henry.Wang@xxxxxxx>
- Date: Tue, 13 Jun 2023 02:59:18 +0000
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <Bertrand.Marquis@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Tue, 13 Jun 2023 02:59:44 +0000
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- Thread-topic: [PATCH 1/4] xen/arm: debug-pl011: Use correct accessors
Hi Michal,
> -----Original Message-----
> Subject: [PATCH 1/4] xen/arm: debug-pl011: Use correct accessors
>
> Although most PL011 UARTs can cope with 32-bit accesses, some of the old
> legacy ones might not. PL011 registers are 8/16-bit wide and this shall
> be perceived as the normal behavior.
>
> Modify early printk pl011 code for arm32/arm64 to use the correct
> accessors depending on the register size (refer ARM DDI 0183G, Table 3.1).
>
> Signed-off-by: Michal Orzel <michal.orzel@xxxxxxx>
I've tested this patch on top of today's staging on FVP arm32 and arm64 and
confirm this patch will not break existing functionality. So:
Tested-by: Henry Wang <Henry.Wang@xxxxxxx>
Kind regards,
Henry
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