From: Jennifer Herbert <Jennifer.Herbert@citrix.com>
To: "'xen-devel@lists.xenproject.org'" <xen-devel@lists.xenproject.org>
Cc: Juergen Gross <jgross@suse.com>
Subject: Re: Legacy PIC (x86) support (RTC) in dom0 with Linux 4.12 and newer is broken for some hardware.
Date: Wed, 5 Dec 2018 16:40:52 +0000 [thread overview]
Message-ID: <5C07FF94.70905@citrix.com> (raw)
In-Reply-To: <a46c25e311ed4a42a201583709920ab0@AMSPEX02CL03.citrite.net>
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@lists.xenproject.org
> https://lists.xenproject.org/mailman/listinfo/xen-devel
>
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next prev parent reply other threads:[~2018-12-05 16:41 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-04 17:24 Legacy PIC (x86) support (RTC) in dom0 with Linux 4.12 and newer is broken for some hardware Jennifer Herbert
2018-12-05 16:40 ` Jennifer Herbert [this message]
2018-12-06 5:36 ` Juergen Gross
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