From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: Re: [PATCH v2 10/16] Added support for selecting VFIO interrupt type from EAL command-line Date: Wed, 21 May 2014 06:39:26 +0900 Message-ID: References: <1400514709-24087-11-git-send-email-anatoly.burakov@intel.com> <20140520042323.4dbea108@samsung-9> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Cc: "dev-VfR2kkLFssw@public.gmane.org" To: "Burakov, Anatoly" Return-path: In-Reply-To: List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces-VfR2kkLFssw@public.gmane.org Sender: "dev" Originally igb_uio had code for MSI, but it was broken. See my patches which fixed that and several other bugs. On Tue, May 20, 2014 at 8:26 PM, Burakov, Anatoly wrote: > Hi Stephen, > > > I am not sure that MSI-X has any advantage with only one IRQ, so MSI > would > > do. > > Igb_uio doesn't support MSI, so I never included MSI support. It can be > added though, but I don't see much point. > > > Then have the code look at the PCI capability of device and fallback to > INTX if > > needed. It should also check if INTX works, see kernel for details, > since some > > PCI emulation like VMware is broken. > > I believe VFIO itself does that already when it sets up interrupts. > > Best regards, > Anatoly Burakov > DPDK SW Engineer > > > >