Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759145AbbKSWHX (ORCPT ); Thu, 19 Nov 2015 17:07:23 -0500 Received: from mail-ob0-f178.google.com ([209.85.214.178]:33954 "EHLO mail-ob0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751221AbbKSWHW (ORCPT ); Thu, 19 Nov 2015 17:07:22 -0500 MIME-Version: 1.0 In-Reply-To: <1447970147-1733-1-git-send-email-boris.ostrovsky@oracle.com> References: <1447970147-1733-1-git-send-email-boris.ostrovsky@oracle.com> From: Andy Lutomirski Date: Thu, 19 Nov 2015 14:07:02 -0800 Message-ID: Subject: Re: [PATCH v2 0/3] Fix and cleanup for 32-bit PV sysexit To: Boris Ostrovsky Cc: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , David Vrabel , Konrad Rzeszutek Wilk , Andrew Lutomirski , Borislav Petkov , "linux-kernel@vger.kernel.org" , "xen-devel@lists.xenproject.org" , Linux Virtualization Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1105 Lines: 26 On Thu, Nov 19, 2015 at 1:55 PM, Boris Ostrovsky wrote: > 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. This whole series is: Acked-by: Andy Lutomirski Now I just have to sucker someone into getting rid of PARAVIRT_ADJUST_EXCEPTION_FRAME (by using stub entries) and the overcomplicated syscall entry stuff. :) And whoever gets rid of PARAVIRT_ADJUST_EXCEPTION_FRAME gets to wonder why it doesn't crash and burn for NMIs on Xen, since I'm reasonably confident that it can't possibly be correct. --Andy -- 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/