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=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 24D3CC43381 for ; Wed, 13 Feb 2019 21:36:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EE1312086C for ; Wed, 13 Feb 2019 21:36:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389633AbfBMVgy (ORCPT ); Wed, 13 Feb 2019 16:36:54 -0500 Received: from mga02.intel.com ([134.134.136.20]:41474 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729767AbfBMVgy (ORCPT ); Wed, 13 Feb 2019 16:36:54 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 13 Feb 2019 13:36:53 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.58,366,1544515200"; d="scan'208";a="274859798" Received: from chang-linux-2.sc.intel.com ([10.3.52.165]) by orsmga004.jf.intel.com with ESMTP; 13 Feb 2019 13:36:53 -0800 From: "Chang S. Bae" To: Andy Lutomirski , Thomas Gleixner , Ingo Molnar , "H . Peter Anvin" , Andi Kleen Cc: Ravi Shankar , "Chang S . Bae" , LKML Subject: [PATCH v6 00/12] x86: Enable FSGSBASE instructions Date: Wed, 13 Feb 2019 13:36:12 -0800 Message-Id: <20190213213624.14354-1-chang.seok.bae@intel.com> X-Mailer: git-send-email 2.19.1 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 Updates from v5 [5]: * Drop the new tain flag (TAINT_INSECURE) * Cleanup copy_thread_tls(), some changelog, and unnecessary comments on assembly macros * Rearrange some helper updates appropriately (from patch 4 to 6) Updates from v4 [4]: * Remove the FSGSBASE assembly macros Updates from v3 [3]: * Raise minimum binutils requirement to use the new instructions directly * Optimize FIND_PERCPU_BASE macro * Rename some helper functions, __{rd,wr}gsbase_inactive() * Use NOKPROBE_SYMBOL instead of __kprobes * Rebase on top of the helper function fix [7] Update from v2 [2]: * Separate out the preparatory patches [6] (merged as of now) * Bisect the paranoid_entry update patch * Edit minor nits Updates from v1 [1]: * Update the GSBASE update mechanism on the paranoid entry/exit. * Exclude ptracer backward compatibility patches. * Include FSGSBASE documentation and enumerating capability for user space * Add the TAINT_INSECURE flag. [1] Version 1: https://lore.kernel.org/patchwork/cover/934843 [2] Version 2: https://lore.kernel.org/patchwork/cover/912063 [3] Version 3: https://lore.kernel.org/patchwork/cover/1002725 [4] Version 4: https://lore.kernel.org/patchwork/cover/1032799 [5] Version 5: https://lore.kernel.org/patchwork/cover/1038035 [5] https://lore.kernel.org/patchwork/cover/988180 [6] https://lore.kernel.org/patchwork/patch/1017513 Andi Kleen (3): x86/fsgsbase/64: Add intrinsics for FSGSBASE instructions x86/elf: Enumerate kernel FSGSBASE capability in AT_HWCAP2 x86/fsgsbase/64: Add documentation for FSGSBASE Andy Lutomirski (4): x86/fsgsbase/64: Add 'unsafe_fsgsbase' to enable CR4.FSGSBASE x86/fsgsbase/64: Preserve FS/GS state in __switch_to() if FSGSBASE is on selftests/x86/fsgsbase: Test WRGSBASE x86/fsgsbase/64: Enable FSGSBASE by default and add a chicken bit Chang S. Bae (5): kbuild: Raise the minimum required binutils version to 2.21 x86/fsgsbase/64: Enable FSGSBASE instructions in the helper functions x86/fsgsbase/64: When copying a thread, use the FSGSBASE instructions if available x86/fsgsbase/64: Introduce the FIND_PERCPU_BASE macro x86/fsgsbase/64: Use the per-CPU base as GSBASE at the paranoid_entry .../admin-guide/kernel-parameters.txt | 2 + Documentation/process/changes.rst | 6 +- Documentation/x86/fsgs.txt | 104 +++++++++++++++++ arch/x86/entry/entry_64.S | 71 +++++++++--- arch/x86/include/asm/fsgsbase.h | 95 ++++++++++++++-- arch/x86/include/asm/inst.h | 15 +++ arch/x86/include/uapi/asm/hwcap2.h | 3 + arch/x86/kernel/cpu/common.c | 22 ++++ arch/x86/kernel/process_64.c | 105 ++++++++++++++++-- tools/testing/selftests/x86/fsgsbase.c | 102 ++++++++++++++++- 10 files changed, 484 insertions(+), 41 deletions(-) create mode 100644 Documentation/x86/fsgs.txt -- 2.19.1