Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965964Ab3DQHuo (ORCPT ); Wed, 17 Apr 2013 03:50:44 -0400 Received: from mail.skyhub.de ([78.46.96.112]:43724 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965738Ab3DQHum (ORCPT ); Wed, 17 Apr 2013 03:50:42 -0400 Date: Wed, 17 Apr 2013 09:50:37 +0200 From: Borislav Petkov To: Sasha Levin Cc: Pekka Enberg , Ingo Molnar , "H. Peter Anvin" , Fengguang Wu , lkml , x86-ml , kvm@vger.kernel.org Subject: Re: [PATCH] x86: Add a Kconfig shortcut for a kvm-bootable kernel Message-ID: <20130417075037.GB11807@pd.tnic> References: <20130412181956.GA13099@pd.tnic> <516A7760.7030907@kernel.org> <20130414110320.GB20547@pd.tnic> <20130416161852.GH5332@pd.tnic> <516DEF20.9060303@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <516DEF20.9060303@gmail.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2471 Lines: 81 On Tue, Apr 16, 2013 at 08:38:56PM -0400, Sasha Levin wrote: > > select NET > > select NETDEVICES > > select PCI > > select BLOCK > > select BLK_DEV > > select NETWORK_FILESYSTEMS > > select INET > > select EXPERIMENTAL > > select TTY > > select SERIAL_8250 > > select SERIAL_8250_CONSOLE > > select IP_PNP > > select IP_PNP_DHCP > > select BINFMT_ELF > > select PCI_MSI > > select HAVE_ARCH_KGDB > > select DEBUG_KERNEL > > select KGDB > > select KGDB_SERIAL_CONSOLE > > select VIRTUALIZATION > > select VIRTIO > > select VIRTIO_RING > > select VIRTIO_PCI > > select VIRTIO_BLK > > select VIRTIO_CONSOLE > > select VIRTIO_NET > > select 9P_FS > > select NET_9P > > select NET_9P_VIRTIO > > > > to the option below which we already have. It is in the same sense a KVM > > guest support deal. > > > > Hmm. > > > > KVM people, any objections? > > > > config KVM_GUEST > > bool "KVM Guest support (including kvmclock)" > > depends on PARAVIRT > > select PARAVIRT_CLOCK > > default y > > ---help--- > > This option enables various optimizations for running under the KVM > > hypervisor. It includes a paravirtualized clock, so that instead > > of relying on a PIT (or probably other) emulation by the > > underlying device model, the host provides the guest with > > timing infrastructure such as time of day, and system time > > KVM guests don't need a serial device, KGDB, DEBUG_KERNEL or 9p in particular. Let's see: * we need serial device for catching serial output on the host from the guest kernel * KGDB - I guess this was meant to jump into the debugger when the guest crashes or so, we could drop it. * DEBUG_KERNEL is also good for testing kernels * 9p is needed for -virtfs folder sharing, AFAICT: http://wiki.qemu.org/Documentation/9psetup So, I guess we can have another KVM_GUEST_KERNEL_TESTING option which enables those additional, good for debugging options (except 9p - it should be in the main thing) and which depends on KVM_GUEST. It would also contain other DEBUG_* stuff. Thanks. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. -- -- 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/