Re: [Xen-devel] [PATCH v4 2/2] xen/arm: Sign extend TimerValue when computing the CompareValue

[Julien Grall <julien@xxxxxxx>]

Hi,

On 21/01/2020 15:07, Jeff Kubascik wrote:
> Xen will only store the CompareValue as it can be derived from the
> TimerValue (ARM DDI 0487E.a section D11.2.4):
>
>    CompareValue = (Counter[63:0] + SignExtend(TimerValue))[63:0]
>
> While the TimerValue is a 32-bit signed value, our implementation
> assumed it is a 32-bit unsigned value.
>
> Signed-off-by: Jeff Kubascik <jeff.kubascik@xxxxxxxxxxxxxxx>
Acked-by: Julien Grall <julien@xxxxxxx>

Cheers,

--
Julien Grall

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