Re: [Xen-devel] [PATCH v3 10/11] x86/rtc: replace paravirt rtc check with x86 specific solution

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 23/02/16 07:24, Luis R. Rodriguez wrote:
> --- a/arch/x86/xen/enlighten.c
> +++ b/arch/x86/xen/enlighten.c
[...]
> @@ -1526,8 +1525,6 @@ asmlinkage __visible void __init xen_start_kernel(void)
>  
>       /* Install Xen paravirt ops */
>       pv_info = xen_info;
> -     if (xen_initial_domain())
> -             pv_info.features |= PV_SUPPORTED_RTC;
>       pv_init_ops = xen_init_ops;
>       if (!xen_pvh_domain()) {
>               pv_cpu_ops = xen_cpu_ops;
> diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
> index a0a4e554c6f1..fbfcb01015f0 100644
> --- a/arch/x86/xen/time.c
> +++ b/arch/x86/xen/time.c
> @@ -446,8 +446,10 @@ void __init xen_init_time_ops(void)
>       x86_platform.calibrate_tsc = xen_tsc_khz;
>       x86_platform.get_wallclock = xen_get_wallclock;
>       /* Dom0 uses the native method to set the hardware RTC. */
> -     if (!xen_initial_domain())
> +     if (!xen_initial_domain()) {
> +             x86_init.platform_flags |= X86_PLATFORM_NO_RTC;
>               x86_platform.set_wallclock = xen_set_wallclock;
> +     }
>  }

Is this an early enough point to set this flag?

David

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