linux-kernel - Re: [PATCH 02/14] x86-64/efi: Use EFI to deal with platform wall clock (again)

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Message-ID: <52B8C675.30204@zytor.com>
Date:	Mon, 23 Dec 2013 15:25:41 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	joeyli <jlee@...e.com>
CC:	Matt Fleming <matt@...sole-pimps.org>, 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, Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Matt Fleming <matt.fleming@...el.com>
Subject: Re: [PATCH 02/14] x86-64/efi: Use EFI to deal with platform wall
 clock (again)

On 12/20/2013 03:29 AM, One Thousand Gnomes wrote:
> On Thu, 19 Dec 2013 21:32:19 +0800
> joeyli <jlee@...e.com> wrote:
> 
>> 於 四，2013-12-19 於 10:49 +0000，Matt Fleming 提到：
>>> On Thu, 19 Dec, at 06:20:16PM, Lee, Chun-Yi wrote:
>>>> From: Jan Beulich <JBeulich@...e.com>
>>>>
>>>> Other than ix86, x86-64 on EFI so far didn't set the
>>>> {g,s}et_wallclock accessors to the EFI routines, thus
>>>> incorrectly using raw RTC accesses instead.
> 
> Probably wise.
> 
> Before anyone reverts that please make sure it also works on EFI32,
> because right now we crash and burn on multiple EFI32 tablets querying
> the time.
> 

Quite -- we in fact did just the opposite (checkin 04bf9ba720fc).

	-hpa

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