Re: [Xen-devel] Legacy PIC (x86) support (RTC) in dom0 with Linux 4.12 and newer is broken for some hardware.

[Jennifer Herbert <Jennifer.Herbert@xxxxxxxxxx>]

CC: Juergen Gross

On 04/12/18 17:24, Jennifer Herbert wrote:
> Since Linux 4.12, there has been a 
> commita1e23a42f1bdc00e32fc4869caef12e4e6272f26
>
> “rtc: cmos: Do not assume irq 8 for rtc when there are no legacy irqs”
>
> The commit effectively disabled requesting IRQ 8 for systems without PIC
>
> controller present (As in the case when used at dom0 under Xen) and at
>
> the same time where this IRQ is not explicitly described in ACPI tables.
>
> I have found hardware without this IRQ in the ACPI tables, and indeed,
>
> found the RTC to be broken in dom 0.  Temporarily, I reverted this
>
> commit, which fixed the problem, but I was wondering if anyone here
>
> knew of a better solution?
>
> Cheers,
>
> -jenny
>
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxxx
> https://lists.xenproject.org/mailman/listinfo/xen-devel
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel