Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933508AbbKRUHU (ORCPT ); Wed, 18 Nov 2015 15:07:20 -0500 Received: from userp1040.oracle.com ([156.151.31.81]:34174 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933325AbbKRUHS (ORCPT ); Wed, 18 Nov 2015 15:07:18 -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 0/3] Fix and cleanup for 32-bit PV sysexit Date: Wed, 18 Nov 2015 15:06:16 -0500 Message-Id: <1447877179-2775-1-git-send-email-boris.ostrovsky@oracle.com> X-Mailer: git-send-email 1.8.1.4 X-Source-IP: userv0022.oracle.com [156.151.31.74] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1704 Lines: 38 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. (I ended up patching TEST with XOR to avoid extra NOPs, even though I said yesterday it would be wrong. It's not wrong) As result of this patch irq_enable_sysexit and usergs_sysret32 pv ops are not used anymore by anyone and so can be 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 | 11 ++++------- arch/x86/entry/entry_64_compat.S | 16 ++++++---------- 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, 14 insertions(+), 107 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/