From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37355) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gaGg8-0001jv-44 for qemu-devel@nongnu.org; Fri, 21 Dec 2018 04:01:08 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gaGg4-0005pT-Up for qemu-devel@nongnu.org; Fri, 21 Dec 2018 04:01:08 -0500 Received: from mail-wm1-x32a.google.com ([2a00:1450:4864:20::32a]:51573) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gaGg4-0005oB-Dw for qemu-devel@nongnu.org; Fri, 21 Dec 2018 04:01:04 -0500 Received: by mail-wm1-x32a.google.com with SMTP id b11so4547209wmj.1 for ; Fri, 21 Dec 2018 01:01:04 -0800 (PST) References: <76d14474.f850.167cb46b4d9.Coremail.13824125580@163.com> <87d0pw9y7m.fsf@linaro.org> <19e6128e.27e9.167ce041690.Coremail.13824125580@163.com> From: Alex =?utf-8?Q?Benn=C3=A9e?= In-reply-to: <19e6128e.27e9.167ce041690.Coremail.13824125580@163.com> Date: Fri, 21 Dec 2018 09:01:02 +0000 Message-ID: <874lb79ru9.fsf@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Subject: Re: [Qemu-devel] did the qemu can emulate the whole system with the processor that without support the "virtulization and kvm"? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: tugouxp <13824125580@163.com> Cc: qemu-devel@nongnu.org tugouxp <13824125580@163.com> writes: > Hi alex: > now my host machine did not have the "/dev/kvm" nodes and no chance t= o make it exists. > so i want to know whether the "/dev/kvm" is mandatory for qemu to emula= te the whole system. > so i can make the emulation without the support of kvm mechanism. QEMU runs in two modes - full system emulation with TCG doesn't require KVM although it is relatively slow. On systems where there guest architecture is the same as the host architecture you can run with KMV (or HAX/WHPX/HVF) accelerators at near native speeds. The reasons for not having a /dev/kvm can vary but you haven't said what your host architecture is and what OS you are running so it's hard to offer advice here. -- Alex Benn=C3=A9e