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=-8.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,USER_AGENT_MUTT 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 56CDEC169C4 for ; Thu, 31 Jan 2019 11:58:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0E7BF218FC for ; Thu, 31 Jan 2019 11:58:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548935881; bh=yeagtBxukxA6Is+Vu0BlJKlmuO6fQGpQ+Jbl9+NyK5w=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=bjMt+eFhN9OdVr3cBF823XnaOQ8r49XiwrjImi+wyZJDnCvi5AuNwe0Zdh3mHrvW1 /gnJ5oIOVsk6JinLlSN7kdE/yHllyQZTgCFKV4ntY4p9rZT22HzAwI/snoKlgJsASp 8Cmq2I8jr5J6ZACZiV8Wc5OnakFc2AVHftoOSL28= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728687AbfAaL57 (ORCPT ); Thu, 31 Jan 2019 06:57:59 -0500 Received: from mail.kernel.org ([198.145.29.99]:34516 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726153AbfAaL57 (ORCPT ); Thu, 31 Jan 2019 06:57:59 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id F2F42218D3; Thu, 31 Jan 2019 11:57:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548935878; bh=yeagtBxukxA6Is+Vu0BlJKlmuO6fQGpQ+Jbl9+NyK5w=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=1Dg+5GFppXx1DB4fa+2k9HlPzpKqqPTRrmY/nXDL4yruBrsyjU5h0QlW2j75z+m+P wRMQP2TMsyXGu7Hhvb6gq/scvgdQ8zlzhMzepYrSfdgc/lSryNUnFVLZnt+Iq5VzPq rYHjNG0bB2IdX/eC0oYDXnoYAqDyw2gzIb4apHDs= Date: Thu, 31 Jan 2019 12:57:56 +0100 From: Greg KH To: lantianyu1986@gmail.com Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mchehab+samsung@kernel.org, sashal@kernel.org, sthemmin@microsoft.com, joro@8bytes.org, x86@kernel.org, michael.h.kelley@microsoft.com, mingo@redhat.com, Lan Tianyu , arnd@arndb.de, haiyangz@microsoft.com, alex.williamson@redhat.com, bp@alien8.de, tglx@linutronix.de, vkuznets@redhat.com, nicolas.ferre@microchip.com, iommu@lists.linux-foundation.org, devel@linuxdriverproject.org, akpm@linux-foundation.org, davem@davemloft.net Subject: Re: [PATCH 1/3] x86/Hyper-V: Set x2apic destination mode to physical when x2apic is available Message-ID: <20190131115756.GA19969@kroah.com> References: <1548929853-25877-1-git-send-email-Tianyu.Lan@microsoft.com> <1548929853-25877-2-git-send-email-Tianyu.Lan@microsoft.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1548929853-25877-2-git-send-email-Tianyu.Lan@microsoft.com> User-Agent: Mutt/1.11.2 (2019-01-07) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jan 31, 2019 at 06:17:31PM +0800, lantianyu1986@gmail.com wrote: > From: Lan Tianyu > > Hyper-V doesn't provide irq remapping for IO-APIC. To enable x2apic, > set x2apic destination mode to physcial mode when x2apic is available > and Hyper-V IOMMU driver makes sure cpus assigned with IO-APIC irqs have > 8-bit APIC id. > > Signed-off-by: Lan Tianyu > --- > arch/x86/kernel/cpu/mshyperv.c | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c > index e81a2db..9d62f33 100644 > --- a/arch/x86/kernel/cpu/mshyperv.c > +++ b/arch/x86/kernel/cpu/mshyperv.c > @@ -36,6 +36,8 @@ > struct ms_hyperv_info ms_hyperv; > EXPORT_SYMBOL_GPL(ms_hyperv); > > +extern int x2apic_phys; Shouldn't this be in a .h file somewhere instead? thanks, greg k-h