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[23.128.96.18]) by mx.google.com with ESMTP id gx2si4706333ejb.706.2020.07.17.02.35.02; Fri, 17 Jul 2020 02:35:25 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=fail header.i=@infradead.org header.s=merlin.20170209 header.b=J5mK0s4t; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726293AbgGQJeQ (ORCPT + 99 others); Fri, 17 Jul 2020 05:34:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54910 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725912AbgGQJeQ (ORCPT ); Fri, 17 Jul 2020 05:34:16 -0400 Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:8b0:10b:1231::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DE234C061755; Fri, 17 Jul 2020 02:34:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.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=G+DDgxlCayqTqkbq04dhgvzaNPWJG1ftzlKeUp8ZiFs=; b=J5mK0s4tYmqK6uzf1Ef8cazS/R to9O6JMHWxqFx/Q73rJAgfpYCwgTaJ2p4J5jxdEO1zUSL7Q4VWYsXvU5iJzpQR2ZqKENNkHA9EXJr ftW+mfAAxwQ0HjEBs1RO0M9ljr04qNOR8yuXhaTdKDLmU0XpO0pwG7bwgBFNDuapJ5HJ7u1Mkd+pS cs/sgBSDcF/Dyb1pJETDT1yOY35LS/DK7+hqF+OFHaCvScr8WU5GtLwxRBallJ4KReWd7/F5srgru lKtFmrRk7I9GXt8BOAWYoRmFymx51TOWhwZyWD7BZYyNmj+oPmp2nqUHzPk+UataRPkG6PLrUCiUk ljYZR/SQ==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jwMkl-00005B-TB; Fri, 17 Jul 2020 09:34:04 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id C058C300130; Fri, 17 Jul 2020 11:34:01 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id B322929CF6F55; Fri, 17 Jul 2020 11:34:01 +0200 (CEST) Date: Fri, 17 Jul 2020 11:34:01 +0200 From: Peter Zijlstra To: ira.weiny@intel.com Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Dave Hansen , x86@kernel.org, Dan Williams , Vishal Verma , Andrew Morton , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH RFC V2 17/17] x86/entry: Preserve PKRS MSR across exceptions Message-ID: <20200717093401.GG10769@hirez.programming.kicks-ass.net> References: <20200717072056.73134-1-ira.weiny@intel.com> <20200717072056.73134-18-ira.weiny@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200717072056.73134-18-ira.weiny@intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jul 17, 2020 at 12:20:56AM -0700, ira.weiny@intel.com wrote: > +/* Define as macros to prevent conflict of inline and noinstr */ > +#define idt_save_pkrs(state) > +#define idt_restore_pkrs(state) Use __always_inline