Megha Dey of Intel just checked in a 5-part patch to the LUV project, adding a new NDCTL (NFIT Defined Control) test suite to LUV.
This patchset adds the NDCTL(NFIT Defined Control) test suite to LUV. Apart from the recipe, it updates the Linux kernel headers, adds the related binaries and a parser to the final LUV image.It addresses issue 58. We also compile and install the required kernel modules for running the NDCTL test suite and add the configurations needed by the NDCTL testsuite as config fragments to the default config values from v4.4 kernel. A Non-Volatile DIMM (NVDIMM), is a module that can be integrated into the main memory of a compute platform, perform workloads at DRAM speeds, yet be persistent & provide data retention in the event of a power failure or system crash. The LIBNVDIMM subsystem provides block device drivers for three types of NVDIMMs namely nd_pmem (NFIT enabled version of existing ‘pmem’ driver), nd_blk (mmio aperture method for accessing persistent storage) and nd_btt(give persistent memory disk semantics)that can simultaneously support both PMEM and BLK mode access. The NVDIMM Firmware Interface Table (NFIT) numerates persistent memory ranges, memory-mapped-I/O apertures, physical memory devices (DIMMs), and their associated properties. Prior to the arrival of the NFIT, non-volatile memory was described to a system only using a single system-physical-address range where writes are expected to be durable after a system power loss. Now, the NFIT specification standardizes not only the description of PMEM, but also BLK and platform message-passing entry points for control and configuration. The NDCTL test suite has 5 tests in total divided into 2 sets of tests: One uses the manufactured NFIT (NVDIMM Firmware Interface Table) to build the nfit_test module as an external module and arrange for the external module replacements of nfit, libnvdimm, nd_pmem, and nd_blk and the other which has the actual *destructive* tests that create namespaces and perform I/O tests on them.
luv: NDCTL: Update the linux kernel headers
core-image-efi-initramfs: Add NDCTL binaries
luv-test-manager: Add stderr output to LUV parser
luv : NDCTL: Add NDCTL test suite
linux-efi-yocto-test: build NDCTL test suite
More info:
https://github.com/01org/luv-yocto/issues/58
https://www.kernel.org/doc/Documentation/nvdimm/nvdimm.txt
https://github.com/pmem/ndctl
http://permalink.gmane.org/gmane.linux.kernel.commits.head/535671
https://lists.01.org/mailman/listinfo/luv
https://lwn.net/Articles/640891/
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