Received: by 2002:ac0:a5a6:0:0:0:0:0 with SMTP id m35-v6csp2614639imm; Mon, 10 Sep 2018 04:03:05 -0700 (PDT) X-Google-Smtp-Source: ANB0VdYM10KfhJDVjrUS4+nc5M3aWKz0yk4W5g3MDKZ702CFfu0SxSxKQUJUupaQ6cX1u++9TWaV X-Received: by 2002:a17:902:74ca:: with SMTP id f10-v6mr21521102plt.260.1536577385761; Mon, 10 Sep 2018 04:03:05 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1536577385; cv=none; d=google.com; s=arc-20160816; b=O2XB6WCaMFNymxNpnpU66bCyXBK/S2p9mf7Fu5d5icJjJbjD3N8uOiMgUD7exLhunP rbLjGgT+LGUYGPTcm2zWMQhzZRGD25U8n/FfvTDoH+MB2SJ0fwJMJ8kdfz3NBbvlKOZ9 lGUzAm0y5riE3TDMGTN3um972g5RibUWQy+8si+EeqjJzRz3hLQcpvgneU/mkFJ9kuNl G9IYhFW9j2DvduZS4g+SDebA1VF3WwONhilXyLROBz37qx0TeKsLw5QpeL0sLYvFjxDg oPh244f228QQ/WEsbE2Vyg5DRt6TbowIEHInTKbVH15mdiVCw6KSRGjDIlN8eQmkW5ff tCAw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:user-agent:references :message-id:in-reply-to:subject:cc:to:from:date; bh=6t7znapupQM+47mdw243rYQ9BMJ5QmGPtL98GVsC9nY=; b=TYThXbjVGJqiy7M9wY1hJrFeh5U7e1IpAkEveyxwwy4Rvu4Khdrkm+lD7t9s0qL/hT jSYE04WjRykgOUs0usFtE3oOYSzi2c6e0aTgXuEjAieerdteqlEbR+dOKsfhAjHJaO3E 6umQdPVRozjUUuagxXVl7+5ZOFfzZ5xAyRJSrixg5WDoIcDNVBx61MpZp7Zrv+E0P+Ua 0ZBFa51Xz8fbEj3CxRZnohAD6sVYV4KnwR7gNIJtMXj5Kp44LQarVyxZHD1vZ4SmLrKg lqO862VUscSNvAlsI06Qlds8E8juLkvSHs9+bIkNmtdY7bkmfMbSzq3SX0Tz/vdyJLje onKA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id w19-v6si15838436plp.25.2018.09.10.04.02.50; Mon, 10 Sep 2018 04:03:05 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727772AbeIJPzH (ORCPT + 99 others); Mon, 10 Sep 2018 11:55:07 -0400 Received: from mx2.suse.de ([195.135.220.15]:56026 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727411AbeIJPzH (ORCPT ); Mon, 10 Sep 2018 11:55:07 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 2383FAFEF; Mon, 10 Sep 2018 11:01:36 +0000 (UTC) Date: Mon, 10 Sep 2018 13:01:34 +0200 (CEST) From: Jiri Kosina To: Thomas Gleixner cc: Ingo Molnar , Peter Zijlstra , Josh Poimboeuf , Andrea Arcangeli , "Woodhouse, David" , Andi Kleen , Tim Chen , "Schaufler, Casey" , linux-kernel@vger.kernel.org, x86@kernel.org Subject: Re: [PATCH v5 2/2] x86/speculation: Enable cross-hyperthread spectre v2 STIBP mitigation In-Reply-To: Message-ID: References: User-Agent: Alpine 2.21 (LSU 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 10 Sep 2018, Thomas Gleixner wrote: > That looks much more palatable. One missing piece is the sysfs > mitigation file for spectre v2. That should reflect STIPB state as well. FWIW, we're missing a bit more in that area, namely RSB stuffing on context switch, IBRS (even through only around fw) and IBPB; those are only signalled in dmesg during bootup. Want to add all this stuff there? Thanks, -- Jiri Kosina SUSE Labs