linux-kernel - Re: [RFC PATCH 04/14] ACPI: Add ACPI 5.0 Time and Alarm Device driver

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Message-ID: <1389091244.3539.6095.camel@linux-s257.site>
Date:	Tue, 07 Jan 2014 18:40:44 +0800
From:	joeyli <jlee@...e.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Matt Fleming <matt@...sole-pimps.org>,
	Matthew Garrett <matthew.garrett@...ula.com>, Elliott@...com,
	samer.el-haj-mahmoud@...com, Oliver Neukum <oneukum@...e.de>,
	werner@...e.com, trenn@...e.de, JBeulich@...e.com,
	linux-kernel@...r.kernel.org, rtc-linux@...glegroups.com,
	x86@...nel.org,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	linux-acpi@...r.kernel.org
Subject: Re: [RFC PATCH 04/14] ACPI: Add ACPI 5.0 Time and Alarm Device
 driver

於 一，2014-01-06 於 21:37 -0800，H. Peter Anvin 提到：
> On 01/06/2014 12:58 AM, joeyli wrote:
> > 於 二，2013-12-31 於 16:42 -0800，H. Peter Anvin 提到：
> >> On 12/19/2013 09:41 PM, joeyli wrote:
> >>>>
> >>>> What platform do you have that has TAD support?  I am wondering how this
> >>>> was tested.
> >>>>
> >>>
> >>> It's a testing platform that's only support get/set time functions of
> >>> ACPI TAD.
> >>>
> >>
> >> It would be really, really good to get this into Qemu (either SeaBIOS or
> >> OVMF, or ideally both) so we can have anyone test.
> >>
> >> 	-hpa
> > 
> > I will try to add to OVMF first.
> > 
> 
> For the record, I posted a patch to Qemu about a year ago to store the
> timezone in the CMOS, which might be useful for this implementation.  It
> was rejected because of no firmware support, so if you implement it for
> OVMF we can (update and) push this patch again.
> 
> 	-hpa
> 

Thanks for your patch. 

Due to accessing CMOS through ASL need enable SMM support in OVMF, I am
looking Laszlo's OVMF S3 patches:

https://www.mail-archive.com/edk2-devel@lists.sourceforge.net/msg04969.html

Honestly I am not good on this area, I need to spend more time to
understand it.


Regards
Joey Lee

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