The free OSR Learning Library has more than 50 articles on a wide variety of topics about writing and debugging device drivers and Minifilters. From introductory level to advanced. All the articles have been recently reviewed and updated, and are written using the clear and definitive style you've come to expect from OSR over the years.
Check out The OSR Learning Library at: https://www.osr.com/osr-learning-library/
I am trying to create a shielded VM on an NVMe drive which is claimed by my custom NVMe driver. Upon debugging, I found that shielded VM creation is failing due to DMA data transfer error.
The "AlignmentMask" member of PORT_CONFIGURATION_INFORMATION in my driver is (0x1) WORD aligned. When I changed it to (0x7)QUAD aligned, there is no data transfer error and shielded VM creation is successful. I have a couple of queries.
1) How "AlignmentMask" is affecting the data transfer/creation of shielded VM?
2) In normal IOs using IOmeter, no data transfer errors are observed. Why this "AlignmentMask" is affecting the data transfer only in creation of shielded VM?
|Upcoming OSR Seminars|
|OSR has suspended in-person seminars due to the Covid-19 outbreak. But, don't miss your training! Attend via the internet instead!||Kernel Debugging||30 Mar 2020||OSR Seminar Space|
|Developing Minifilters||15 Jun 2020||LIVE ONLINE|
|Writing WDF Drivers||22 June 2020||LIVE ONLINE|
|Internals & Software Drivers||28 Sept 2020||Dulles, VA|