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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 38A99C001B2 for ; Thu, 22 Dec 2022 13:09:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235352AbiLVNJq (ORCPT ); Thu, 22 Dec 2022 08:09:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45814 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229726AbiLVNJn (ORCPT ); Thu, 22 Dec 2022 08:09:43 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1374E3AA; Thu, 22 Dec 2022 05:09:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=DIGbjZ8nA1g3Iqt/Q7vETC8/38Ow2ZV5XHH1y7gKWrk=; b=ovm/JIYXQKDYU3paVM+M94jVcf Mun4OLJGrztHEJhyXJIYLqss0OdNDVrAkC9dkOVwzlzhXF6DZRG/1Y7JqQlVbLjw58R1eFZ6gSUlh iJHXYPocTcmBACgBLkpjxvJncBBRJ7jmj1poBdADhod61/Lbc8NaAynTKV+Ezt6qbo1t1P6LGs+H7 K3Q91DXkQE6f9l2KIaVkIF+E4wi7uwpYHjx6ivm7rKxO61u89rjjEyfEDmiQf4N9C2b39TSezxCX2 CkjeV0AJZxFxSFQvyt/Vzl2nlunORuIT+xFFg6uLCBRL2ipa5p+9MMXTh2JaXUa6j61Z6GHm6hCsr U1rxEjgg==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1p8LKN-003ftz-Hu; Thu, 22 Dec 2022 13:09:39 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id CA6FE30006D; Thu, 22 Dec 2022 14:09:28 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id BBF5520D2DE36; Thu, 22 Dec 2022 14:09:28 +0100 (CET) Date: Thu, 22 Dec 2022 14:09:28 +0100 From: Peter Zijlstra To: "H. Peter Anvin" Cc: "Li, Xin3" , "andrew.cooper3@citrix.com" , "linux-kernel@vger.kernel.org" , "x86@kernel.org" , "kvm@vger.kernel.org" , "tglx@linutronix.de" , "mingo@redhat.com" , "bp@alien8.de" , "dave.hansen@linux.intel.com" , "Christopherson,, Sean" , "pbonzini@redhat.com" , "Shankar, Ravi V" Subject: Re: [RFC PATCH 22/32] x86/fred: FRED initialization code Message-ID: References: <20221220063658.19271-1-xin3.li@intel.com> <20221220063658.19271-23-xin3.li@intel.com> <16972e64-7d7b-ad8c-f8dc-6dcab69e629e@citrix.com> <0D72CCA1-A0B6-487B-A6B9-7341020D28A2@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0D72CCA1-A0B6-487B-A6B9-7341020D28A2@zytor.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 20, 2022 at 09:44:33PM -0800, H. Peter Anvin wrote: > Right, this is one major reason for putting #DB/NMI in a separate stack level. But with the IST they each have their own stack, with FRED they'll share this small stack.