From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41904) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e0aYA-0003pW-TM for qemu-devel@nongnu.org; Fri, 06 Oct 2017 17:52:55 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e0aY9-0001YG-Jl for qemu-devel@nongnu.org; Fri, 06 Oct 2017 17:52:54 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39306) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1e0aY9-0001X7-DU for qemu-devel@nongnu.org; Fri, 06 Oct 2017 17:52:53 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 65E0A85543 for ; Fri, 6 Oct 2017 21:52:52 +0000 (UTC) From: Eduardo Habkost Date: Fri, 6 Oct 2017 18:52:38 -0300 Message-Id: <20171006215244.27104-2-ehabkost@redhat.com> In-Reply-To: <20171006215244.27104-1-ehabkost@redhat.com> References: <20171006215244.27104-1-ehabkost@redhat.com> Subject: [Qemu-devel] [PATCH 1/7] qemu-doc: Document minimum kernel version for KVM in x86_64 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Paolo Bonzini , "Michael S. Tsirkin" , Igor Mammedov The default set of KVM CPU features require the host kernel to support them. KVM_PV_EOI is the newest one, and was included on Linux v3.6 (Linux commit ae7a2a3f). Running on an old host might break management software expectations because the latest machine-type won't be runnable while older machine-types might be runnable. Document v3.6 as the minimum kernel version for KVM on x86_64. Signed-off-by: Eduardo Habkost --- qemu-doc.texi | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/qemu-doc.texi b/qemu-doc.texi index ecd186a159..be45b6b6f6 100644 --- a/qemu-doc.texi +++ b/qemu-doc.texi @@ -37,6 +37,7 @@ * QEMU System emulator for non PC targets:: * QEMU Guest Agent:: * QEMU User space emulator:: +* System requirements:: * Implementation notes:: * Deprecated features:: * License:: @@ -2348,6 +2349,14 @@ Act as if the host page size was 'pagesize' bytes Run the emulation in single step mode. @end table +@node System requirements +@chapter System requirements + +@section KVM kernel module + +On x86_64 hosts, the default set of CPU features enabled by the KVM accelerator +require the host to be running Linux v3.6 or newer. + @include qemu-tech.texi -- 2.13.6