linux-kernel - Re: [Xen-devel] [PATCH 8/9] x86/rtc: replace paravirt

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Message-ID: <20160222102743.GB17895@pd.tnic>
Date:	Mon, 22 Feb 2016 11:27:43 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	"Luis R. Rodriguez" <mcgrof@...nel.org>
Cc:	Juergen Gross <jgross@...e.com>, rusty@...tcorp.com.au,
	x86@...nel.org, linux-kernel@...r.kernel.org, luto@...capital.net,
	xen-devel@...ts.xensource.com, david.vrabel@...rix.com,
	boris.ostrovsky@...cle.com
Subject: Re: [Xen-devel] [PATCH 8/9] x86/rtc: replace paravirt_enabled()
 check with subarch check

On Mon, Feb 22, 2016 at 07:07:56AM +0100, Luis R. Rodriguez wrote:
> diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
> index 1ae89a2721d6..fe0d579b63e3 100644
> --- a/arch/x86/include/asm/x86_init.h
> +++ b/arch/x86/include/asm/x86_init.h
> @@ -84,11 +84,14 @@ struct x86_init_paging {
>   *				boot cpu
>   * @timer_init:			initialize the platform timer (default PIT/HPET)
>   * @wallclock_init:		init the wallclock device
> + * @no_cmos_rtc:		set when platform has no CMOS real-time clock
> + * 				present
>   */
>  struct x86_init_timers {
>  	void (*setup_percpu_clockev)(void);
>  	void (*timer_init)(void);
>  	void (*wallclock_init)(void);
> +	bool no_cmos_rtc;

I'd add

	u64 flags;

to x86_init_ops and then set X86_PLATFORM_NO_RTC or so in there. The
reason being, others could use that flags field too, for other stuff and
define more bits.

-- 
Regards/Gruss,
    Boris.

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