From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124])
 by mx.groups.io with SMTP id smtpd.web10.8292.1688720148650438117
 for <devel@edk2.groups.io>;
 Fri, 07 Jul 2023 01:55:48 -0700
Authentication-Results: mx.groups.io;
 dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=NPckP3EE;
 spf=pass (domain: redhat.com, ip: 170.10.129.124, mailfrom: kraxel@redhat.com)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;
	s=mimecast20190719; t=1688720147;
	h=from:from:reply-to:subject:subject:date:date:message-id:message-id:
	 to:to:cc:mime-version:mime-version:content-type:content-type:
	 in-reply-to:in-reply-to:references:references;
	bh=Hcm2bN4L1J1LajL331GGq0urj8m+KNLiO8dlledIRYk=;
	b=NPckP3EEdHo9CKH9evQUN+ZdX9BekZdVPf87XyWNMu55hfWtsDxakKQbjeSrZzlbvXZbbr
	akIRcnNaPFJ1AHD0HWRArAYHTzZM0BkTwXKH73UOPWujudTLElxKwqySZcKDwzUP2c4P30
	1h2GO94MyYA+68dY04hYepjMJGhqef0=
Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com
 [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS
 (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id
 us-mta-327-OP7Li9GMPkuIgiEK9e1bDQ-1; Fri, 07 Jul 2023 04:55:44 -0400
X-MC-Unique: OP7Li9GMPkuIgiEK9e1bDQ-1
Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4])
	(using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
	(No client certificate requested)
	by mimecast-mx02.redhat.com (Postfix) with ESMTPS id AAEA53C0F689;
	Fri,  7 Jul 2023 08:55:43 +0000 (UTC)
Received: from sirius.home.kraxel.org (unknown [10.39.192.253])
	by smtp.corp.redhat.com (Postfix) with ESMTPS id 82A54200B402;
	Fri,  7 Jul 2023 08:55:43 +0000 (UTC)
Received: by sirius.home.kraxel.org (Postfix, from userid 1000)
	id E4A251800626; Fri,  7 Jul 2023 10:55:41 +0200 (CEST)
Date: Fri, 7 Jul 2023 10:55:41 +0200
From: "Gerd Hoffmann" <kraxel@redhat.com>
To: devel@edk2.groups.io, ray.ni@intel.com
Subject: Re: [edk2-devel] [PATCH 0/4] Sync BSP's APIC mode to APs in MP init flow
Message-ID: <4nerjr3hcwfepwzllcsrm3vurwzdyvr7qz6b4lqfualkngt7he@vjtw4v2ixksc>
References: <20230707052901.869-1-ray.ni@intel.com>
MIME-Version: 1.0
In-Reply-To: <20230707052901.869-1-ray.ni@intel.com>
X-Scanned-By: MIMEDefang 3.1 on 10.11.54.4
X-Mimecast-Spam-Score: 0
X-Mimecast-Originator: redhat.com
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

On Fri, Jul 07, 2023 at 01:28:57PM +0800, Ni, Ray wrote:

[ empty cover letter ]

Summary of the patch series changes would be nice.

If I read things correctly this series will:

  (a) allow platforms use x2apic mode by simply switching the BSP into
      x2apic mode early enough (for example in PlatformPei).
  (b) avoids waking up all APs a second time to set apic mode.

Is that correct?

Do you still plan to add a PCD to enable x2apic mode, or is that plan
obsoleted by (a) ?

take care,
  Gerd