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

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Date:	Mon, 22 Feb 2016 09:34:26 -0500
From:	Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:	Borislav Petkov <bp@...en8.de>,
	"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
Subject: Re: [Xen-devel] [PATCH 8/9] x86/rtc: replace paravirt_enabled() check
 with subarch check

On 02/22/2016 05:27 AM, Borislav Petkov wrote:
> 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.

Maybe timer_flags or platform_flags (or something else) to be a little 
more cscope-friendly?

-boris