From mboxrd@z Thu Jan 1 00:00:00 1970 From: "H. Peter Anvin" Subject: Re: [RFC PATCH 00/14] Support timezone of ACPI TAD and EFI TIME Date: Thu, 19 Dec 2013 20:22:08 -0800 Message-ID: <52B3C5F0.1060303@zytor.com> References: <1387439053-8711-1-git-send-email-jlee@suse.com> <52B309EB.90300@zytor.com> <1387512357.3539.4317.camel@linux-s257.site> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1387512357.3539.4317.camel-ONCj+Eqt86TasUa73XJKwA@public.gmane.org> Sender: linux-efi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: joeyli Cc: "Rafael J. Wysocki" , Alessandro Zummo , Matt Fleming , Matthew Garrett , Elliott-VXdhtT5mjnY@public.gmane.org, samer.el-haj-mahmoud-VXdhtT5mjnY@public.gmane.org, Oliver Neukum , werner-IBi9RG/b67k@public.gmane.org, trenn-l3A5Bk7waGM@public.gmane.org, JBeulich-IBi9RG/b67k@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, rtc-linux-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org, x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, "linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Borislav Petkov List-Id: linux-acpi@vger.kernel.org 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