From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9B1C3C77B73 for ; Wed, 19 Apr 2023 13:44:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:References :In-Reply-To:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=9OqNJ7FibKfDAVMi8YBoqnsxzCXNKlPLxvesIqdwVmg=; b=JGGoCo31p/ElXj Y1AJyFB4YDZfq0Y7BGQnk22nT0AtX9if1MnzGiqF0VEdOROn4Iwd1YmRMzlUz9lNzT8pa1izCk+CJ M1dcSqBsJyrOY7qqaQktmlAk7ht04ujvIRuODugk11NauXNG7L5IYpIXN7Cf9vl6pZ/mRuLE8ewJS WheoU+7iYi+VpBpgs/6cbUGeOMwUlwtK6KHbzYIXmse1ld/VqDh/ocRsu7ymYlq1dWIEt+QWzdy7q 1dkYv3CqqT72vxBpgYFaFYSpByIdHn0tSUaFp6SdMnIW+BNJJohGF02a4o34FP8t/GMSXSJD2NVHm 7JcOOATeZpfSEntxMoVQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pp85p-005Y5h-2J; Wed, 19 Apr 2023 13:43:29 +0000 Received: from galois.linutronix.de ([2a0a:51c0:0:12e:550::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pp85n-005Y3I-0g; Wed, 19 Apr 2023 13:43:28 +0000 From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1681911801; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=jFu1BiBIiZJxXn+1gDPlWVAOg5qQuCy99rAdIveUYFI=; b=GioJJVLP3xsJ8meXcrDWG5s5gdc8c0v+E+hPsGfax24KRpT161PXreAJ6xSi1/ffGHB7Ig QiBx1CCi33pppdwmwttJl7f18G3nqG0JMirkvI2B/KLs1tu2KE0oys4tguZIBjdpC698x5 qJxDi+HpdhZXd4d+95gQdCA+EcnPYPHRun+2UdCS7FOBBh/HuWgOjO1wzT9vOvsEMfGXhZ Bp60sCQp4nsgLMYaR72tlHdyX8qr1HW2HBQ6txx5eUn8Q1HfGVvmcQX/+2gPF1pOlVbSvA J67MiipF05Kzmx+7IpQU6gIRKBAfRvBEfF5UQtkBc9rk1oQMLK4aT2yGkLma2g== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1681911801; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=jFu1BiBIiZJxXn+1gDPlWVAOg5qQuCy99rAdIveUYFI=; b=PpcgZgskhULkL7/jgakP7Wurg7G56yGaYp+uPBAUp/opltoRjM69gQ7OhILB+Kv0LHnaHA BEEUccjsOmhHz0CA== To: Paul Menzel Cc: linux-kernel@vger.kernel.org, x86@kernel.org, David Woodhouse , Andrew Cooper , Brian Gerst , Arjan van de Veen , Paolo Bonzini , Paul McKenney , Tom Lendacky , Sean Christopherson , Oleksandr Natalenko , "Guilherme G. Piccoli" , Piotr Gorski , David Woodhouse , Usama Arif , =?utf-8?B?SsO8cmdlbiBHcm/Dnw==?= , Boris Ostrovsky , xen-devel@lists.xenproject.org, Russell King , Arnd Bergmann , linux-arm-kernel@lists.infradead.org, Catalin Marinas , Will Deacon , Guo Ren , linux-csky@vger.kernel.org, Thomas Bogendoerfer , linux-mips@vger.kernel.org, "James E. J. Bottomley" , Helge Deller , linux-parisc@vger.kernel.org, Paul Walmsley , Palmer Dabbelt , linux-riscv@lists.infradead.org, Mark Rutland , Sabin Rapan Subject: Re: [patch 00/37] cpu/hotplug, x86: Reworked parallel CPU bringup In-Reply-To: <877cu83v45.ffs@tglx> References: <20230414225551.858160935@linutronix.de> <8247ce4d-15b7-03b2-0c9b-74f8cd6cad50@molgen.mpg.de> <87wn2a4la5.ffs@tglx> <87ttxd4qxz.ffs@tglx> <87r0sh4m7a.ffs@tglx> <8592a301-9933-1cad-bd61-8d97e7c7493b@molgen.mpg.de> <87a5z443g2.ffs@tglx> <877cu83v45.ffs@tglx> Date: Wed, 19 Apr 2023 15:43:20 +0200 Message-ID: <874jpc3s3r.ffs@tglx> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230419_064327_387384_5DC0FBAC X-CRM114-Status: UNSURE ( 9.43 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Apr 19 2023 at 14:38, Thomas Gleixner wrote: > On Wed, Apr 19 2023 at 11:38, Thomas Gleixner wrote: > IOW, the BIOS assignes random numbers to the AP APICs for whatever > raisins, which leaves the parallel startup low level code up a creek > without a paddle, except for actually reading the APICID back from the > APIC. *SHUDDER* So Andrew just pointed out on IRC that this might be related to the ancient issue of the 3-wire APIC bus where IO/APIC and APIC shared the ID space, but that system is definitely post 3-wire APIC :) Thanks, tglx _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel