From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sheng Yang Subject: [PATCH 0/3] Emulate MSI-X mask bits for assigned devices Date: Tue, 28 Sep 2010 17:44:09 +0800 Message-ID: <1285667052-24907-1-git-send-email-sheng@linux.intel.com> Cc: kvm@vger.kernel.org, Sheng Yang To: Avi Kivity , Marcelo Tosatti Return-path: Received: from mga14.intel.com ([143.182.124.37]:12056 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751964Ab0I1JoS (ORCPT ); Tue, 28 Sep 2010 05:44:18 -0400 Sender: kvm-owner@vger.kernel.org List-ID: Hi Avi & Marcelo This patchset would add emulation of MSI-X mask bit for assigned devices in QEmu. BTW: We are also purposed an acceleration of MSI-X mask bit for KVM - to get it done in kernel. That's because sometime MSI-X mask bit was accessed very frequently by guest and emulation in QEmu cost a lot(tens to hundreds percent CPU utilization sometime), e.g. guest using Linux 2.6.18 or under some heavy workload. The method has been proved efficient in Xen, but it would require VMM to handle MSI-X table. Is that OK with you? -- regards Yang, Sheng