Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759260AbbKSV40 (ORCPT ); Thu, 19 Nov 2015 16:56:26 -0500 Received: from userp1040.oracle.com ([156.151.31.81]:28929 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751317AbbKSV4Y (ORCPT ); Thu, 19 Nov 2015 16:56:24 -0500 From: Boris Ostrovsky To: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, david.vrabel@citrix.com, konrad.wilk@oracle.com Cc: luto@kernel.org, bp@suse.de, linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, virtualization@lists.linux-foundation.org, Boris Ostrovsky Subject: [PATCH v2 0/3] Fix and cleanup for 32-bit PV sysexit Date: Thu, 19 Nov 2015 16:55:44 -0500 Message-Id: <1447970147-1733-1-git-send-email-boris.ostrovsky@oracle.com> X-Mailer: git-send-email 1.8.1.4 X-Source-IP: userv0021.oracle.com [156.151.31.71] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1842 Lines: 45 The first patch fixes Xen PV regression introduced by 32-bit rewrite. Unlike the earlier version it uses ALTERNATIVE instruction and avoids using xen_sysexit (and sysret32 in compat mode) pv ops, as suggested by Andy. As result of this patch irq_enable_sysexit and usergs_sysret32 pv ops are not used anymore by anyone and so can be removed. v2: * patch both TEST and JZ intructions with a single JMP * Add magic prefix to X86_FEATURE_XENPV comment to avoid having it printed in /proc/cpuinfo * Clarify in commit messages why irq_enable_sysexit and usergs_sysret32 are removed Boris Ostrovsky (3): x86/xen: Avoid fast syscall path for Xen PV guests x86: irq_enable_sysexit pv op is no longer needed x86: usergs_sysret32 pv op is no longer needed arch/x86/entry/entry_32.S | 13 +++++-------- arch/x86/entry/entry_64_compat.S | 20 ++++++++------------ arch/x86/include/asm/cpufeature.h | 1 + arch/x86/include/asm/paravirt.h | 12 ------------ arch/x86/include/asm/paravirt_types.h | 17 ----------------- arch/x86/kernel/asm-offsets.c | 3 --- arch/x86/kernel/asm-offsets_64.c | 1 - arch/x86/kernel/paravirt.c | 12 ------------ arch/x86/kernel/paravirt_patch_32.c | 2 -- arch/x86/kernel/paravirt_patch_64.c | 3 --- arch/x86/xen/enlighten.c | 7 +++---- arch/x86/xen/xen-asm_32.S | 14 -------------- arch/x86/xen/xen-asm_64.S | 19 ------------------- arch/x86/xen/xen-ops.h | 3 --- 14 files changed, 17 insertions(+), 110 deletions(-) -- 1.8.1.4 -- 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/