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 X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 75636C4332D for ; Thu, 19 Mar 2020 09:13:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4FB4520722 for ; Thu, 19 Mar 2020 09:13:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726895AbgCSJNB convert rfc822-to-8bit (ORCPT ); Thu, 19 Mar 2020 05:13:01 -0400 Received: from poy.remlab.net ([94.23.215.26]:55482 "EHLO ns207790.ip-94-23-215.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726063AbgCSJNB (ORCPT ); Thu, 19 Mar 2020 05:13:01 -0400 Received: from basile.remlab.net (87-92-31-51.bb.dnainternet.fi [87.92.31.51]) (Authenticated sender: remi) by ns207790.ip-94-23-215.eu (Postfix) with ESMTPSA id 6848C5FB07; Thu, 19 Mar 2020 10:12:58 +0100 (CET) From: =?ISO-8859-1?Q?R=E9mi?= Denis-Courmont To: Catalin Marinas , Will Deacon , linux-arm-kernel@lists.infradead.org Cc: Mark Rutland , James Morse , linux-kernel@vger.kernel.org Subject: [PATCHv3 0/3] clean up KPTI / SDEI trampoline data alignment Date: Thu, 19 Mar 2020 11:12:56 +0200 Message-ID: <1938400.7m7sAWtiY1@basile.remlab.net> Organization: Remlab MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, The KPTI and SDE trampolines each load a pointer from the same fixmap data page. This reduces the data alignment to the useful value, and tries to clarify the assembler code. Changes since v2: - Retain alignment even when SDEI is disabled to keep ld happy. ---------------------------------------------------------------- Rémi Denis-Courmont (3): arm64: clean up trampoline vector loads arm64/sdei: gather trampolines' .rodata arm64: reduce trampoline data alignment arch/arm64/kernel/entry.S | 23 ++++++++++------------- arch/arm64/mm/mmu.c | 5 ++--- 2 files changed, 12 insertions(+), 16 deletions(-) -- Реми Дёни-Курмон http://www.remlab.net/ 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 X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B392BC4332D for ; Thu, 19 Mar 2020 09:13:13 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 7EF9820722 for ; Thu, 19 Mar 2020 09:13:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Cyttc5PB" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7EF9820722 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=remlab.net Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=wVbW44OoCJo9PIer+1iCXw3zp4ZWLPODOFxXdPGuDVg=; b=Cyttc5PBpaWRPX ZbO2hRPrvgAIcGn73ZoMYH4iRfebK7OoqI1qs4XJbrPh8Ydnk+eSFfFifqMTFtBfJ69Nfk9j2b1kb Kt8glhJivRuTJZZCZW6X3TbB9Wxvzs9jDMCN4tuXxQpIr1jWkT1PFnF5KhBLoAnUDSwpa+dDOGAil M4BlsmX95mpyVU4DpSmYaI5DLvc16CwWyiJcmLoYOzvwqDi89K7RNVqm1qyfl2gdjzhToPLjjeaMM Xa2FEoARPugBGssXVu4kLrQ6zMNOdjSdrJMXrwT5dWMG01EmwOh0jMKY40O+ZmQcjjIT/67Kh6Bsw jC0ce/Hpur5ekAqMXsbw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jErEm-0005YE-F0; Thu, 19 Mar 2020 09:13:12 +0000 Received: from poy.remlab.net ([2001:41d0:2:5a1a::] helo=ns207790.ip-94-23-215.eu) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jErEj-0005Xl-Te for linux-arm-kernel@lists.infradead.org; Thu, 19 Mar 2020 09:13:11 +0000 Received: from basile.remlab.net (87-92-31-51.bb.dnainternet.fi [87.92.31.51]) (Authenticated sender: remi) by ns207790.ip-94-23-215.eu (Postfix) with ESMTPSA id 6848C5FB07; Thu, 19 Mar 2020 10:12:58 +0100 (CET) From: =?ISO-8859-1?Q?R=E9mi?= Denis-Courmont To: Catalin Marinas , Will Deacon , linux-arm-kernel@lists.infradead.org Subject: [PATCHv3 0/3] clean up KPTI / SDEI trampoline data alignment Date: Thu, 19 Mar 2020 11:12:56 +0200 Message-ID: <1938400.7m7sAWtiY1@basile.remlab.net> Organization: Remlab MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200319_021310_096731_5277CA3F X-CRM114-Status: UNSURE ( 5.77 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , James Morse , linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org CUhpLAoKVGhlIEtQVEkgYW5kIFNERSB0cmFtcG9saW5lcyBlYWNoIGxvYWQgYSBwb2ludGVyIGZy b20gdGhlIHNhbWUgZml4bWFwIGRhdGEKcGFnZS4gVGhpcyByZWR1Y2VzIHRoZSBkYXRhIGFsaWdu bWVudCB0byB0aGUgdXNlZnVsIHZhbHVlLCBhbmQgdHJpZXMgdG8KY2xhcmlmeSB0aGUgYXNzZW1i bGVyIGNvZGUuCgpDaGFuZ2VzIHNpbmNlIHYyOgotIFJldGFpbiBhbGlnbm1lbnQgZXZlbiB3aGVu IFNERUkgaXMgZGlzYWJsZWQgdG8ga2VlcCBsZCBoYXBweS4KCi0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0KUsOpbWkgRGVuaXMt Q291cm1vbnQgKDMpOgogICAgICBhcm02NDogY2xlYW4gdXAgdHJhbXBvbGluZSB2ZWN0b3IgbG9h ZHMKICAgICAgYXJtNjQvc2RlaTogZ2F0aGVyIHRyYW1wb2xpbmVzJyAucm9kYXRhCiAgICAgIGFy bTY0OiByZWR1Y2UgdHJhbXBvbGluZSBkYXRhIGFsaWdubWVudAoKIGFyY2gvYXJtNjQva2VybmVs L2VudHJ5LlMgfCAyMyArKysrKysrKysrLS0tLS0tLS0tLS0tLQogYXJjaC9hcm02NC9tbS9tbXUu YyAgICAgICB8ICA1ICsrLS0tCiAyIGZpbGVzIGNoYW5nZWQsIDEyIGluc2VydGlvbnMoKyksIDE2 IGRlbGV0aW9ucygtKQoKLS0gCtCg0LXQvNC4INCU0ZHQvdC4LdCa0YPRgNC80L7QvQpodHRwOi8v d3d3LnJlbWxhYi5uZXQvCgoKCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fXwpsaW51eC1hcm0ta2VybmVsIG1haWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVs QGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9s aXN0aW5mby9saW51eC1hcm0ta2VybmVsCg==