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 3DE85C4321D for ; Thu, 23 Aug 2018 16:45:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9791A208F7 for ; Thu, 23 Aug 2018 16:45:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9791A208F7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726829AbeHWUPs (ORCPT ); Thu, 23 Aug 2018 16:15:48 -0400 Received: from mga11.intel.com ([192.55.52.93]:1808 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726064AbeHWUPs (ORCPT ); Thu, 23 Aug 2018 16:15:48 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 23 Aug 2018 09:45:14 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.53,278,1531810800"; d="scan'208";a="227129252" Received: from chang-linux-2.sc.intel.com ([10.3.52.139]) by orsmga004.jf.intel.com with ESMTP; 23 Aug 2018 09:45:14 -0700 From: "Chang S. Bae" To: Thomas Gleixner , Andy Lutomirski , "H . Peter Anvin" , Ingo Molnar Cc: Andi Kleen , Dave Hansen , Markus T Metzger , Ravi Shankar , "Chang S . Bae" , LKML Subject: [RESEND PATCH V5 0/8] x86: infrastructure to enable FSGSBASE Date: Thu, 23 Aug 2018 09:44:30 -0700 Message-Id: <1535042678-31366-1-git-send-email-chang.seok.bae@intel.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Resending the patchset that was posted before [6]. Given feedbacks from [1], it was suggested to separate two parts and to (re-)submit this patchset first. To facilitate FSGSBASE, Andy's FS/GS base read fix is first ordered, then some helper functions and refactoring work are included. Cleanup for the vDSO initialization is for preparing per-CPU base finder that will be used in the paranoid entry, when FSGSBASE enabled. Changes from V4 [5]: * Change patch ordering; putting the fix first before introducing the helper functions * Cleanup further for vDSO CPU initialization codes Changes from V3 [4]: * Unify CPU number initialization Changes from V2 [3]: * Bisect the CPU number initialization patch * Drop patches for introducing i386 CPU_NUMBER and switching write_rdtscp_aux() to use wrmsr_safe() Changes from V1 [2]: * Rename the x86-64 CPU_NUMBER segment from PER_CPU * Add i386 CPU_NUMBER equivalent to x86-64 at GDT entry 23 * Add additional helper function to store CPU number * Switch write_rdtscp_aux() to use wrmsr_safe() [1] FSGSBASE patch set V2: https://lore.kernel.org/patchwork/cover/912063/ [2] infrastructure for FSGSBASE V1: https://lore.kernel.org/patchwork/cover/913139/ [3] V2: https://lore.kernel.org/patchwork/cover/913644/ [4] V3: https://lore.kernel.org/patchwork/cover/949775/ [5] V4: https://lore.kernel.org/patchwork/cover/951712/ [6] V5: https://lore.kernel.org/patchwork/cover/956526/ Andy Lutomirski (1): x86/arch_prctl/64: Make ptrace read FS/GS base accurately Chang S. Bae (7): x86/fsgsbase/64: Introduce FS/GS base helper functions x86/fsgsbase/64: Make ptrace use FS/GS base helpers x86/fsgsbase/64: Use FS/GS base helpers in core dump x86/fsgsbase/64: Factor out load FS/GS segments from __switch_to x86/segments/64: Rename PER_CPU segment to CPU_NUMBER x86/vdso: Introduce helper functions for CPU and node number x86/vdso: Move out the CPU initialization arch/x86/entry/vdso/vgetcpu.c | 9 +- arch/x86/entry/vdso/vma.c | 38 +-------- arch/x86/include/asm/elf.h | 6 +- arch/x86/include/asm/fsgsbase.h | 47 +++++++++++ arch/x86/include/asm/segment.h | 46 +++++++++- arch/x86/include/asm/vgtod.h | 26 ------ arch/x86/kernel/cpu/common.c | 24 ++++++ arch/x86/kernel/process_64.c | 183 +++++++++++++++++++++++++++++++--------- arch/x86/kernel/ptrace.c | 28 ++---- 9 files changed, 270 insertions(+), 137 deletions(-) create mode 100644 arch/x86/include/asm/fsgsbase.h -- 2.7.4