> -----Original Message-----
> From: H. Peter Anvin [mailto:[email protected]]
> Sent: Wednesday, March 20, 2013 11:02 AM
> To: Ren, Qiaowei
> Cc: Thomas Gleixner; Ingo Molnar; [email protected]; Maliszewski, Richard L;
> [email protected]; [email protected]; Xiaoyan
> Zhang; Wei, Gang
> Subject: Re: [PATCH v2] x86: add a new SMP bring up way for tboot case
>
> On 03/19/2013 07:14 PM, Ren, Qiaowei wrote:
> > Any comments on this patch?
> >
> > Thanks,
> > Qiaowei
>
> The biggest question is probably if we can use an existing hook of some sort.
>
> Overriding the apic method is probably not the right way to go, though.
> tglx, do you have any opinions here?
>
If we can't use an existing hook, could you please give me any suggestion about
other opinions here?
> Furthermore, this really is not nice:
>
> > +int tboot_wake_up(int apicid, unsigned long sipi_vec) {
> > + if (!tboot_enabled())
> > + return 0;
> > +
> > + if ((tboot->version < 6) ||
> > + !(tboot->flags & TB_FLAG_AP_WAKE_SUPPORT))
> > + return 0;
> > +
> > + tboot->ap_wake_addr = sipi_vec;
> > + tboot->ap_wake_trigger = apicid;
> > +
> > + return 1;
> > +}
>
> Not only don't you set boot_error for the code above it, but there is
> absolutely
> no indication how that does its job (are those active operations? If so they
> should use writel()), nor does it include any kind of synchronization.
>
Ok. I should add some comments to explain how that does its job.
But I guess boot_error don't have to be set inside this function.
Thanks,
Qiaowei
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