From patchwork Thu Jul 9 07:49:05 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Huth X-Patchwork-Id: 6753431 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 63902C05AC for ; Thu, 9 Jul 2015 07:49:20 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8C2E220607 for ; Thu, 9 Jul 2015 07:49:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8F3C620529 for ; Thu, 9 Jul 2015 07:49:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751936AbbGIHtP (ORCPT ); Thu, 9 Jul 2015 03:49:15 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34255 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750843AbbGIHtN (ORCPT ); Thu, 9 Jul 2015 03:49:13 -0400 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) by mx1.redhat.com (Postfix) with ESMTPS id AD47B2CD846; Thu, 9 Jul 2015 07:49:12 +0000 (UTC) Received: from thh440s.redhat.com (vpn1-6-213.ams2.redhat.com [10.36.6.213]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t697n6Gk032295; Thu, 9 Jul 2015 03:49:06 -0400 From: Thomas Huth To: "Michael S. Tsirkin" , kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, kvm-ppc@vger.kernel.org, virtualization@lists.linux-foundation.org, Greg Kurz Cc: linux-arm-kernel@lists.infradead.org, Gleb Natapov , Paolo Bonzini , Christoffer Dall , Marc Zyngier , Alexander Graf , Paul Mackerras , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, kraxel@redhat.com, Cornelia Huck , Linus Torvalds Subject: [PATCH] KVM: Add Kconfig option to signal cross-endian guests Date: Thu, 9 Jul 2015 09:49:05 +0200 Message-Id: <1436428145-29823-1-git-send-email-thuth@redhat.com> In-Reply-To: <20150707195012-mutt-send-email-mst@redhat.com> References: <20150707195012-mutt-send-email-mst@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-7.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The option for supporting cross-endianness legacy guests in the vhost and tun code should only be available on systems that support cross-endian guests. Signed-off-by: Thomas Huth Acked-by: Christoffer Dall Acked-by: Cornelia Huck Acked-by: Greg Kurz --- arch/arm/kvm/Kconfig | 1 + arch/arm64/kvm/Kconfig | 1 + arch/powerpc/kvm/Kconfig | 1 + drivers/net/Kconfig | 1 + drivers/vhost/Kconfig | 1 + virt/kvm/Kconfig | 3 +++ 6 files changed, 8 insertions(+) diff --git a/arch/arm/kvm/Kconfig b/arch/arm/kvm/Kconfig index bfb915d..9d8f363 100644 --- a/arch/arm/kvm/Kconfig +++ b/arch/arm/kvm/Kconfig @@ -31,6 +31,7 @@ config KVM select KVM_VFIO select HAVE_KVM_EVENTFD select HAVE_KVM_IRQFD + select KVM_CROSS_ENDIAN_GUESTS depends on ARM_VIRT_EXT && ARM_LPAE && ARM_ARCH_TIMER ---help--- Support hosting virtualized guest machines. diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig index bfffe8f..9af39fe 100644 --- a/arch/arm64/kvm/Kconfig +++ b/arch/arm64/kvm/Kconfig @@ -31,6 +31,7 @@ config KVM select KVM_VFIO select HAVE_KVM_EVENTFD select HAVE_KVM_IRQFD + select KVM_CROSS_ENDIAN_GUESTS ---help--- Support hosting virtualized guest machines. diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig index 3caec2c..e028710 100644 --- a/arch/powerpc/kvm/Kconfig +++ b/arch/powerpc/kvm/Kconfig @@ -79,6 +79,7 @@ config KVM_BOOK3S_64_HV select KVM_BOOK3S_HV_POSSIBLE select MMU_NOTIFIER select CMA + select KVM_CROSS_ENDIAN_GUESTS ---help--- Support running unmodified book3s_64 guest kernels in virtual machines on POWER7 and PPC970 processors that have diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index c18f9e6..0c4ce47 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -261,6 +261,7 @@ config TUN config TUN_VNET_CROSS_LE bool "Support for cross-endian vnet headers on little-endian kernels" default n + depends on KVM_CROSS_ENDIAN_GUESTS ---help--- This option allows TUN/TAP and MACVTAP device drivers in a little-endian kernel to parse vnet headers that come from a diff --git a/drivers/vhost/Kconfig b/drivers/vhost/Kconfig index 533eaf0..4d8ae6b 100644 --- a/drivers/vhost/Kconfig +++ b/drivers/vhost/Kconfig @@ -35,6 +35,7 @@ config VHOST config VHOST_CROSS_ENDIAN_LEGACY bool "Cross-endian support for vhost" + depends on KVM_CROSS_ENDIAN_GUESTS default n ---help--- This option allows vhost to support guests with a different byte diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig index e2c876d..cc7b28a 100644 --- a/virt/kvm/Kconfig +++ b/virt/kvm/Kconfig @@ -47,3 +47,6 @@ config KVM_GENERIC_DIRTYLOG_READ_PROTECT config KVM_COMPAT def_bool y depends on COMPAT && !S390 + +config KVM_CROSS_ENDIAN_GUESTS + bool