linux-kernel - Re: [RFC PATCH 00/14] Support timezone of ACPI TAD and EFI TIME

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Date:	Thu, 19 Dec 2013 20:22:08 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	joeyli <jlee@...e.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, Borislav Petkov <bp@...e.de>
Subject: Re: [RFC PATCH 00/14] Support timezone of ACPI TAD and EFI TIME

On 12/19/2013 08:05 PM, joeyli wrote:
> 
> Then that means the priority of PNP0B0x is higher then "CMOS RTC Not
> Present" flag. ACPI spec doesn't have clear definition on this.
> 

According to the Microsoft requirements documents, such a platform is
broken and shouldn't exist.

> I look forward to Borislav's "EFI runtime mapping" to fix the physical
> address accessing issue of EFI time service on x86_64 machines. I tested
> his patches on a issue machine and it works for walk around BIOS bug.
> 
> Can we use EFI time services on x86_64 after Borislav's patches accepted
> to mainline?
> 

No.

	-hpa


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