linux-kernel - Re: [PATCH] rtc: Disable EFI rtc for x86

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Date:	Mon, 10 Nov 2014 17:04:17 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Austin S Hemmelgarn <ahferroin7@...il.com>
Cc:	Pali Rohár <pali.rohar@...il.com>,
	Matt Fleming <matt.fleming@...el.com>,
	Borislav Petkov <bp@...en8.de>,
	Mark Salter <msalter@...hat.com>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	rtc-linux@...glegroups.com, linux-efi@...r.kernel.org,
	linux-kernel@...r.kernel.org, Dave Young <dyoung@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH] rtc: Disable EFI rtc for x86

On Mon, Nov 10, 2014 at 11:45:06AM -0500, Austin S Hemmelgarn wrote:

> I agree, without it you need PC CMOS RTC support to access the RTC
> on most systems, which in turn means that you have to enable the CSM
> in the EFI firmware, which is annoying cause you can't easily dual
> boot windows with secure boot when the CSM is enabled.

CMOS RTC support doesn't depend on the CSM.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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