From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: Re: [PATCH v7 0/5] Add Intel IOMMU debugfs support Date: Thu, 15 Feb 2018 10:53:38 +0100 Message-ID: <20180215095337.fccoozdclfnbepi4@8bytes.org> References: <1517619001-148586-1-git-send-email-sohil.mehta@intel.com> <20180213140303.42mbzfxpypljy37l@8bytes.org> <20180213214002.GA27066@otc-nc-03> <20180213145332.35c73eda@jacob-builder> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20180213145332.35c73eda@jacob-builder> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Jacob Pan Cc: Ravi V Shankar , "Raj, Ashok" , Fenghua Yu , iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Andy Shevchenko , David Woodhouse , Gayatri Kammela List-Id: iommu@lists.linux-foundation.org On Tue, Feb 13, 2018 at 02:53:32PM -0800, Jacob Pan wrote: > We did start out with /dev/mem but run into CONFIG_STRICT_DEVMEM > requirement which is turned on by default. > libpci is only limited to PCI config space access, right? Even if /dev/mem is not an option, I am still not convinced that this is a good idea. How should this be used? Will you just use it to debug Intel IOMMUs when you guys work on the driver or should users report the data back when they hit problems? Joerg