On 2013-05-08, Matthew Garrett wrote: > On Tue, 2013-05-07 at 22:55 +0800, Qiaowei Ren wrote: > >> +What: /sys/devices/platform/intel_txt/log/log_header >> +Date: May 2013 >> +KernelVersion: 3.9 > > How different are these logs to the TPM measurements exported via > securityfs?
These logs come from tboot (Trusted Boot, an open source, pre-kernel/VMM module that uses Intel® Trusted Execution Technology (Intel® TXT) to perform a measured and verified launch of an OS kernel/VMM.), and should be different from those TPM measurements (from BIOS?) exported via security. >> +What: /sys/devices/platform/intel_txt/log/block_index >> +Date: May 2013 >> +KernelVersion: 3.9 >> +Contact: "Qiaowei Ren" <[email protected]> >> +Description: The "block_index" property allows you to set the block >> + index for output. > > So I write a value here and then I see different chunks of log? This > doesn't seem like an optimal interface. What do these logs actually > contain? How do I know which block I should be reading? Yes. Since total log size is bigger than one page 4K, the log have to be displayed in 4K-block indexed by block_index. These logs will be very helpful for txt related debugging. Thanks, Qiaowei N�����r��y����b�X��ǧv�^�){.n�+����{����zX����ܨ}���Ơz�&j:+v�������zZ+��+zf���h���~����i���z� �w���?�����&�)ߢf��^jǫy�m��@A�a��� 0��h���i
