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=-4.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 429F0C433E0 for ; Fri, 15 May 2020 17:28:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 149892076A for ; Fri, 15 May 2020 17:28:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589563688; bh=UhWUiz4i2ua+ePQnkwga76Is6IlUX/kwGgzY/Tlf9Rw=; h=From:To:Cc:Subject:Date:List-ID:From; b=XNol+uPPwLwuoyH8SS/Dtu6lfT0n6u25L6Y5T71qNchIh6NUgZO6Gfy75uE6RoB3T RcSyzE6GnI43Jijq/N/5JaCqKoaOT+mRda/z9jjNktq8dNShw5olpLIbodnvky8Gha 11hW1nwfPlcbjP6/e0UCsXnw8wzGIiBz0glBM1Uw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726551AbgEOR2H (ORCPT ); Fri, 15 May 2020 13:28:07 -0400 Received: from mail.kernel.org ([198.145.29.99]:53034 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726023AbgEOR2H (ORCPT ); Fri, 15 May 2020 13:28:07 -0400 Received: from localhost.localdomain (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 95BE120727; Fri, 15 May 2020 17:28:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589563686; bh=UhWUiz4i2ua+ePQnkwga76Is6IlUX/kwGgzY/Tlf9Rw=; h=From:To:Cc:Subject:Date:From; b=i7R/upiPvB13dzbce/7FCK5QI3Jiq/Z5T2Q3J68Qd/A3slV4cLoCuhd4eSBpgVDkD jZPNla3o9j8LB1rbB4PwVdTjs6EUjsgfTY3EU4SZPCJWbH1LVmbOBD5BZyO2+sqwxd mC+6RXA6dCAuCzZFdOkyHgziEbwGcl+65c0hEz6E= From: Will Deacon To: linux-kernel@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, Will Deacon , Sami Tolvanen , Kees Cook , Catalin Marinas , Mark Rutland , Jann Horn , Ard Biesheuvel , Peter Zijlstra , kernel-team@android.com Subject: [PATCH 0/6] Clean up Shadow Call Stack patches for 5.8 Date: Fri, 15 May 2020 18:27:50 +0100 Message-Id: <20200515172756.27185-1-will@kernel.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, Here's a series of cleanups I hacked together on top of a modified v13 of the Shadow Call Stack patches from Sami: https://lore.kernel.org/r/20200515172355.GD23334@willie-the-truck The main changes are: * Move code out of arch/arm64 and into the core implementation * Store the full SCS stack pointer instead of the offset * Code simplification and general style things I'd like to queue this on top early next week so that it can spend some quality time in linux-next. Cheers, Will Cc: Sami Tolvanen Cc: Kees Cook Cc: Catalin Marinas Cc: Mark Rutland Cc: Jann Horn Cc: Ard Biesheuvel Cc: Peter Zijlstra Cc: --->8 Will Deacon (6): arm64: scs: Store absolute SCS stack pointer value in thread_info scs: Move accounting into alloc/free functions arm64: scs: Use 'scs_sp' register alias for x18 scs: Move scs_overflow_check() out of architecture code scs: Remove references to asm/scs.h from core code scs: Move DEFINE_SCS macro into core code arch/Kconfig | 4 +-- arch/arm64/include/asm/scs.h | 29 ++++------------ arch/arm64/include/asm/thread_info.h | 4 +-- arch/arm64/kernel/asm-offsets.c | 2 +- arch/arm64/kernel/entry.S | 10 +++--- arch/arm64/kernel/head.S | 2 +- arch/arm64/kernel/process.c | 2 -- arch/arm64/kernel/scs.c | 6 +--- include/linux/scs.h | 16 +++++---- kernel/sched/core.c | 3 ++ kernel/scs.c | 52 +++++++++++++--------------- 11 files changed, 55 insertions(+), 75 deletions(-) -- 2.26.2.761.g0e0b3e54be-goog