linux-kernel - Re: [Xen-devel] [PATCH v2 10/11] xen/hvmlite: Boot secondary CPUs

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Message-ID: <56B35748.3010302@oracle.com>
Date:	Thu, 4 Feb 2016 08:51:04 -0500
From:	Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:	David Vrabel <david.vrabel@...rix.com>, konrad.wilk@...cle.com
Cc:	xen-devel@...ts.xenproject.org, mcgrof@...e.com,
	linux-kernel@...r.kernel.org, roger.pau@...rix.com
Subject: Re: [Xen-devel] [PATCH v2 10/11] xen/hvmlite: Boot secondary CPUs

On 02/04/2016 05:38 AM, David Vrabel wrote:
> On 01/02/16 15:38, Boris Ostrovsky wrote:
>> HVMlite secondary VCPUs use baremetal bringup path (i.e. native_*
>> smp_ops) but need to do some preparation in PV code.
> If we always provided an emulated APIC could we use the native SMP
> bring-up instead?

We do use native SMP bringup now (wrapped in 
xen_hvm_cpu_up/xen_cpu_die/xen_play_dead)), I added a couple of PV APIC 
ops to help with that, most notably xen_wakeup_secondary_cpu().

-boris