Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752627AbbGJCRu (ORCPT ); Thu, 9 Jul 2015 22:17:50 -0400 Received: from mail.kernel.org ([198.145.29.136]:54408 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751639AbbGJCRl (ORCPT ); Thu, 9 Jul 2015 22:17:41 -0400 From: Andy Lutomirski To: x86@kernel.org, linux-kernel@vger.kernel.org Cc: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Weisbecker?= , Rik van Riel , Oleg Nesterov , Denys Vlasenko , Borislav Petkov , Kees Cook , Brian Gerst , Linus Torvalds , Andy Lutomirski Subject: [RFC/PATCH v2 v2 0/6] x86_32: Migrate to new entry/exit paths Date: Thu, 9 Jul 2015 19:17:28 -0700 Message-Id: X-Mailer: git-send-email 2.4.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1719 Lines: 39 This is a review version of the 32-bit asm-to-C migration. I think it works, but it's not yet well enough tested. I'm a lot more familiar with the 64-bit asm than the 32-bit asm. The vm86 stuff especially needs much more careful testing. Brian, since you're playing with vm86 now, can you take a look? Changes from v1: - Fix some nasty vm86 issues. v1 was a regression. v2 is an improvement over the status quo AFAICT. - Add patch 1, which is probably worthwhile on its own. - Get rid of the temporary ud2 hack. Andy Lutomirski (6): x86/selftests, x86/vm86: Improve entry_from_vm86 selftest x86/entry/32: Remove 32-bit syscall audit optimizations x86/entry/32: Fix an incorrect comment for work_notifysig_v86 x86/entry/32: Remove unnecessary asm check for returns to kernel mode x86/entry/32: Migrate to C exit path and rework vm86 exit hack x86/entry: Remove do_notify_resume, syscall_trace_leave, and their TIF masks arch/x86/entry/common.c | 107 ++++++++++----------- arch/x86/entry/entry_32.S | 130 +++---------------------- arch/x86/include/asm/ptrace.h | 1 - arch/x86/include/asm/signal.h | 1 - arch/x86/include/asm/thread_info.h | 18 +--- arch/x86/kernel/vm86_32.c | 6 +- tools/testing/selftests/x86/entry_from_vm86.c | 132 ++++++++++++++++++++++++-- 7 files changed, 191 insertions(+), 204 deletions(-) -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/