From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-2074586-1517563982-2-16192193221498755433 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, DATE_IN_PAST_03_06 1.592, HEADER_FROM_DIFFERENT_DOMAINS 0.001, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='com', MailFrom='org' X-Spam-charsets: plain='utf-8' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1517563982; b=PM5bNKNbFNCgaQoie+KlCiUqxX775hjnJBW4YIhydR7QPZb 59FWZp16p1nt8GoiqTl7sX+avmHBw/lHgmceZDzC2PnWfhpol3wxPrB4X0WLtTrO C902sjbo4W4WnTbFnfX4REmdverxK67yXu4LM/AZ2EQUeYwGAAWGopwR/dF6lNXF EVGZC3wgZVLYrbVSXGfZEqJ7Rd3BHU1czEyWJ5791p08WeUKnIPv3kID9sgy1WDL IcXNh4QbtFVfzCGBAI/5WWUEwJ0ntUWm3j8eg3/cEinJ+ck/s6iT5sitmTUZcxKl g/9y4zwr89ny0P+eayczoTZO2OoGCi55167P+9w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=subject:to:cc:references:from:message-id :date:mime-version:in-reply-to:content-type :content-transfer-encoding:sender:list-id; s=arctest; t= 1517563982; bh=PelU/mBgoHhagA5Qu8lbssM1C0RCskRXG0wV5z6S88E=; b=N yIuNv3T1ANXbsOylfNaM4iAKWV/o2eDA1Bzp8XpsON1VkUMJDH+t+u5JNyBOJ8QQ zGdttP3tckl5W0hZ2XxDysxrVYRjBn97UD07lR+PfibQrUhshjZaoaN8k61VzMVw 6xLDDaukMgTVUUp9f6zowLYQEp3yaW9DZzBa938Ki9/4oVNwVbOXZUet5dLKGNFv 5w6b8IzWKhOoZE3FkmSKFeXXQWDpCD97RhbJ3cIm3prOy8T134B2zrQAC8Lt+4cQ UPeol1ngd5obEIj56i3sOXAyFROlvIi5qGDLoZz79+Egjnc501K+w5KBRChmydvx tgNeF39AL9mHQO54la7hg== ARC-Authentication-Results: i=1; mx3.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=suse.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=suse.com header.result=pass header_is_org_domain=yes Authentication-Results: mx3.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=suse.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=suse.com header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751796AbeBBJdA (ORCPT ); Fri, 2 Feb 2018 04:33:00 -0500 Received: from mx2.suse.de ([195.135.220.15]:41335 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751221AbeBBJca (ORCPT ); Fri, 2 Feb 2018 04:32:30 -0500 Subject: Re: [Xen-devel] [PATCH v2] x86/xen: init %gs very early to avoid page faults with stack protector To: Chris Patterson , Boris Ostrovsky Cc: linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, stable@vger.kernel.org References: <20180201124019.11693-1-jgross@suse.com> From: Juergen Gross Message-ID: <3a4fa32b-7909-9fa6-4b6c-71d6b51ad35d@suse.com> Date: Fri, 2 Feb 2018 06:56:24 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.2 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: de-DE Content-Transfer-Encoding: 7bit Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On 02/02/18 01:36, Chris Patterson wrote: > Works great, tested it and it fixes booting Linux v4.15 kernel for me :) Can I add your "Tested-by:" to the patch when committing it? Juergen > > Cheers! > > On Thu, Feb 1, 2018 at 3:17 PM, Boris Ostrovsky > wrote: >> On 02/01/2018 07:40 AM, Juergen Gross wrote: >>> When running as Xen pv guest %gs is initialized some time after >>> C code is started. Depending on stack protector usage this might be >>> too late, resulting in page faults. >>> >>> So setup %gs and MSR_GS_BASE in assembly code already. >>> >>> Cc: stable@vger.kernel.org >>> Signed-off-by: Juergen Gross >> >> Reviewed-by: Boris Ostrovsky >> >> >> >> _______________________________________________ >> Xen-devel mailing list >> Xen-devel@lists.xenproject.org >> https://lists.xenproject.org/mailman/listinfo/xen-devel >