From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:38411) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RB2x8-0002Ip-7M for qemu-devel@nongnu.org; Tue, 04 Oct 2011 07:14:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RB2x7-0000CC-7h for qemu-devel@nongnu.org; Tue, 04 Oct 2011 07:14:26 -0400 Received: from e23smtp07.au.ibm.com ([202.81.31.140]:58217) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RB2x6-0000Bn-EW for qemu-devel@nongnu.org; Tue, 04 Oct 2011 07:14:25 -0400 Received: from d23relay03.au.ibm.com (d23relay03.au.ibm.com [202.81.31.245]) by e23smtp07.au.ibm.com (8.14.4/8.13.1) with ESMTP id p94BE8RN028840 for ; Tue, 4 Oct 2011 22:14:08 +1100 Received: from d23av03.au.ibm.com (d23av03.au.ibm.com [9.190.234.97]) by d23relay03.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id p94BE6gd1962140 for ; Tue, 4 Oct 2011 22:14:08 +1100 Received: from d23av03.au.ibm.com (loopback [127.0.0.1]) by d23av03.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id p94BE5mH005150 for ; Tue, 4 Oct 2011 22:14:05 +1100 From: pingfank@linux.vnet.com Date: Tue, 4 Oct 2011 19:13:35 +0800 Message-Id: <1317726818-8514-1-git-send-email-pingfank@linux.vnet.com> Subject: [Qemu-devel] Enable x86 linux guest with cpu hotplug feature. List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: linux-acpi@vger.kernel.org, qemu-devel@nongnu.org Cc: aliguori@us.ibm.com, Liu Ping Fan , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, ryanh@us.ibm.com, shaohua.li@intel.com, lenb@kernel.org From: Liu Ping Fan A bunch of patches, which are applied separately for kernel and qemu-kvm, and make x86 based linux guest with cpu hotplug feature. For kernel: 0001-ACPI-Call-ACPI-remove-handler-when-handling-ACPI-eje.patch --call acpi eject event handler in acpi_bus_notify() For qemu-kvm: 0001-ACPI-Update-cpu-hotplug-event-for-guest.patch --trigger acpi cpu hotplug event for guest, so qemu-kvm can bring present cpu to online state 0002-LAPIC-make-lapic-support-cpu-hotplug.patch --make qemu-kvm support to bring possible cpu to present state. After applying these patches, we can bring possible cpu online by the following step. 1.Boot up qemu-kvm with the param "-smp 1,maxcpu=4", 2.Use "cpu_set 2 online" cmd in qemu monitor to bring possible cpu to present state. 3.In guest,echo 1 > cpu2/online to bring the present cpu to online state.