From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: Re: [v4 0/8] Add VT-d Posted-Interrupts support - IOMMU part Date: Thu, 2 Apr 2015 13:28:33 +0200 Message-ID: <20150402112833.GN4441@8bytes.org> References: <1422864424-19411-1-git-send-email-feng.wu@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1422864424-19411-1-git-send-email-feng.wu@intel.com> Sender: linux-kernel-owner@vger.kernel.org To: Feng Wu Cc: dwmw2@infradead.org, jiang.liu@linux.intel.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, "Li, Zhen-Hua" List-Id: iommu@lists.linux-foundation.org On Mon, Feb 02, 2015 at 04:06:56PM +0800, Feng Wu wrote: > VT-d Posted-Interrupts is an enhancement to CPU side Posted-Interrupt. > With VT-d Posted-Interrupts enabled, external interrupts from > direct-assigned devices can be delivered to guests without VMM > intervention when guest is running in non-root mode. > > You can find the VT-d Posted-Interrtups Spec. in the following URL: > http://www.intel.com/content/www/us/en/intelligent-systems/intel-technology/vt-directed-io-spec.html > > This series was part of http://thread.gmane.org/gmane.linux.kernel.iommu/7708. To make things clear, send out IOMMU part here. Besides the modify_irte() changes I asked for the patch-set looks good. I just have some concerns what these changes mean for the VT-d kdump improvements Zhen-Hua Li is working on. Can you please discuss the implications of having both patch-sets applied with him and make sure they work together? I think in its current form your patch-set breaks the kdump support patches. I added Zhen-Hua to Cc. Thanks, Joerg