SPR: IDXD driver (on top of openEuler-22.09) - DSA/IAA incremental backporting patches until upstream 6.0 · Pull Request !173 · openEuler/kernel

**IDXD kernel driver:** 
IDXD driver is the common driver framework of Intel Data Stream Accelerator (DSA) and Intel In-memory Analytics Accelerator (IAA). This patchset covers the incremental backporting kernel patches until upstream 6.0. It fixes issues:
1. https://gitee.com/openeuler/intel-kernel/issues/I596WO 
2. https://gitee.com/openeuler/intel-kernel/issues/I590PB

**DSA – Intel Data Streaming Accelerator:** 
Intel DSA is a high-performance data copy and transformation accelerator that will be integrated in future Intel processors, targeted for optimizing streaming data movement and transformation operations common with applications for high-performance storage, networking, persistent memory, and various data processing applications. See more details in DSA spec:
https://software.intel.com/content/www/us/en/develop/articles/intel-data-streaming-accelerator-architecture-specification.html

**IAA - Intel In-memory Analytics Accelerator:** 
Intel In-memory Analytics Accelerator, integrated accelerator IP that accelerates analytics primitives (scan, filter, etc.), CRC calculations, compression, decompression, and more. See more details in IAA spec:
https://cdrdv2.intel.com/v1/dl/getContent/721858

**There are 157 patches in total in this patch set. It covers:** 
1. IDXD driver incremental patches between 5.10 LTS and upstream 6.0 (Shared WQ, SVM, IAA, driver refactoring and bug fixes).
2. ENQCMD and PASID re-enabling patches (as dependencies of IDXD driver)
3. Other dependencies in IOMMU driver.

**Passed tests:** 
1. Unit tests: passed
- accel-config test
- accel-config/test dsa_user_test_runner.sh
- accel-config/test iaa_user_test_runner.sh
- Kernel dmatest test (SVA disabled: "modprobe idxd sva=0")
- Intel internal DSA config test suite (dsa_config_bat_tests, dsa_config_func_tests)
- Intel internal IAX config test suite (iax_config_bat_tests, iax_config_func_tests)
3. Build successfully.
4. Boot test: passed.

**Kernel config:** 
1. Recommended kernel config:
   CONFIG_IOMMU_SVA=y
   CONFIG_INTEL_IOMMU=y
   CONFIG_INTEL_IOMMU_SVM=y
   CONFIG_PCI_ATS=y
   CONFIG_PCI_PRI=y
   CONFIG_PCI_PASID=y
   CONFIG_INTEL_IDXD_BUS=m
   CONFIG_INTEL_IDXD=m
   \# CONFIG_INTEL_IDXD_COMPAT is not set
   CONFIG_INTEL_IDXD_SVM=y
   CONFIG_DMA_ENGINE=y
   CONFIG_DMATEST=m
   CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON=y
   CONFIG_INTEL_IDXD_PERFMON=y

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