From: Sander Eikelenboom <linux@eikelenboom.it>
To: Jan Beulich <JBeulich@suse.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>,
David Vrabel <david.vrabel@citrix.com>,
x86@kernel.org, tglx@linutronix.de,
xen-devel@lists.xenproject.org, mingo@redhat.com,
vkuznets@redhat.com, linux-kernel@vger.kernel.org,
stable@vger.kernel.org, hpa@zytor.com
Subject: Re: [Xen-devel] [PATCH] x86: Xen PV guests don't have the rtc_cmos platform device
Date: Wed, 09 Dec 2015 16:00:21 +0100 [thread overview]
Message-ID: <745827c24ef5e59808d725d5777b5698@eikelenboom.it> (raw)
In-Reply-To: <56684BD402000078000BDB00@prv-mh.provo.novell.com>
On 2015-12-09 15:42, Jan Beulich wrote:
>>>> On 09.12.15 at 15:32, <boris.ostrovsky@oracle.com> wrote:
>> --- a/arch/x86/kernel/rtc.c
>> +++ b/arch/x86/kernel/rtc.c
>> @@ -200,6 +200,9 @@ static __init int add_rtc_cmos(void)
>> }
>> #endif
>>
>> + if (paravirt_enabled())
>> + return -ENODEV;
>
> What about Xen Dom0?
>
> Jan
Checked that in my testing and that still worked:
[ 16.733837] rtc_cmos 00:02: RTC can wake from S4
[ 16.734030] rtc_cmos 00:02: rtc core: registered rtc_cmos as rtc0
[ 16.734087] rtc_cmos 00:02: alarms up to one month, y3k, 114 bytes
nvram
[ 17.760329] rtc_cmos 00:02: setting system clock to 2015-12-09
08:43:48 UTC (1449650628)
and /dev/rtc and /dev/rtc0 both exist.
But i don't know the nitty gritty details about why ...
--
Sander
next prev parent reply other threads:[~2015-12-09 15:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-09 14:32 Boris Ostrovsky
2015-12-09 14:42 ` [Xen-devel] " Jan Beulich
2015-12-09 15:00 ` Sander Eikelenboom [this message]
2015-12-09 15:15 ` Boris Ostrovsky
2015-12-09 15:27 ` Jan Beulich
2015-12-09 18:18 ` Boris Ostrovsky
2015-12-09 15:23 ` Vitaly Kuznetsov
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