| Message ID | CAPcyv4jE=wfmfWS94WyMWhHwub0jJ4Vm6hnz8G3HJ9rd8pXKSA@mail.gmail.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | [GIT,PULL] Compute Express Link update for v5.18 | expand |
The pull request you sent on Tue, 22 Mar 2022 16:36:48 -0700:
> git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl tags/cxl-for-5.18
has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/b9132c32e01976686efa26252cc246944a0d2cab
Thank you!
Hi Linus, please pull from: git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl tags/cxl-for-5.18 ...to receive the CXL subsystem update for v5.18. This development cycle extends the subsystem to discover CXL resources throughout a CXL/PCIe switch topology and respond to hot add/remove events anywhere in that topology. This is more foundational infrastructure in preparation for dynamic memory region provisioning support. Recall that CXL memory regions, as the new "Theory of Operation" section of Documentation/driver-api/cxl/memory-devices.rst describes, bring storage volume striping semantics to memory. The hot add/remove behavior is validated with extensions to the cxl_test unit test environment and this test in the cxl-cli test suite: https://github.com/pmem/ndctl/blob/djbw/for-74/cxl/test/cxl-topology.sh All but the top commit of this update have seen multiple weeks of exposure in Linux-next with no reported issues. The top-commit is an obviously correct fix applied today. --- The following changes since commit 26291c54e111ff6ba87a164d85d4a4e134b7315c: Linux 5.17-rc2 (2022-01-30 15:37:07 +0200) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl tags/cxl-for-5.18 for you to fetch changes up to 05e815539f3f161585c13a9ab023341bade2c52f: cxl/core/port: Fix NULL but dereferenced coccicheck error (2022-03-22 10:51:17 -0700) ---------------------------------------------------------------- cxl for 5.18 - Add a driver for 'struct cxl_memdev' objects responsible for CXL.mem operation as distinct from 'cxl_pci' mailbox operations. Its primary responsibility is enumerating an endpoint 'struct cxl_port' and all the 'struct cxl_port' instances between an endpoint and the CXL platform root. - Add a driver for 'struct cxl_port' objects responsible for enumerating and operating all Host-managed Device Memory (HDM) decoder resources between the platform-level CXL memory description, all intervening host bridges / switches, and the HDM resources in endpoints. - Update the cxl_pci driver to validate CXL.mem operation precursors to HDM decoder operation like ready-polling, and legacy CXL 1.1 DVSEC based CXL.mem configuration. - Add basic lockdep coverage for usage of device_lock() on CXL subsystem objects similar to what exists for LIBNVDIMM. Include a compile-time switch for which subsystem to validate at run-time. - Update cxl_test to emulate a one level switch topology. - Document a "Theory of Operation" for the subsystem. - Add 'numa_node' and 'serial' attributes to cxl_memdev sysfs - Include miscellaneous fixes for spec / QEMU CXL emulation compatibility and static analysis reports. ---------------------------------------------------------------- Ben Widawsky (17): cxl: Rename CXL_MEM to CXL_PCI cxl/pci: Implement Interface Ready Timeout cxl: Flesh out register names cxl/pci: Add new DVSEC definitions cxl/acpi: Map component registers for Root Ports cxl: Introduce module_cxl_driver cxl/core: Convert decoder range to resource cxl/core/port: Clarify decoder creation cxl/core/port: Make passthrough decoder init implicit cxl/core: Track port depth cxl/port: Add a driver for 'struct cxl_port' objects cxl/pci: Store component register base in cxlds cxl/pci: Cache device DVSEC offset cxl/pci: Retrieve CXL DVSEC memory info cxl/pci: Implement wait for media active cxl/mem: Add the cxl_mem driver cxl/core/port: Add endpoint decoders Dan Williams (29): cxl/pci: Defer mailbox status checks to command timeouts cxl/core/port: Rename bus.c to port.c cxl/decoder: Hide physical address information from non-root cxl/core: Fix cxl_probe_component_regs() error message cxl: Prove CXL locking cxl/core/port: Use dedicated lock for decoder target list cxl/port: Introduce cxl_port_to_pci_bus() cxl/pmem: Introduce a find_cxl_root() helper cxl/port: Up-level cxl_add_dport() locking requirements to the caller cxl/pci: Rename pci.h to cxlpci.h cxl/core: Generalize dport enumeration in the core cxl/core/hdm: Add CXL standard decoder enumeration to the core cxl/core: Emit modalias for CXL devices cxl/core/port: Remove @host argument for dport + decoder enumeration cxl/pci: Emit device serial number cxl/memdev: Add numa_node attribute cxl/core/port: Add switch port enumeration cxl/core: Move target_list out of base decoder attributes tools/testing/cxl: Mock dvsec_ranges() tools/testing/cxl: Fix root port to host bridge assignment tools/testing/cxl: Mock one level of switches tools/testing/cxl: Enumerate mock decoders tools/testing/cxl: Add a physical_node link cxl/core/port: Fix / relax decoder target enumeration cxl/core/port: Handle invalid decoders cxl/core/port: Fix unregister_port() lock assertion cxl/core: Fix cxl_device_lock() class detection cxl/port: Fix endpoint refcount leak cxl/port: Hold port reference until decoder release Jonathan Cameron (1): cxl/regs: Fix size of CXL Capability Header Register Wan Jiabing (1): cxl/core/port: Fix NULL but dereferenced coccicheck error Documentation/ABI/testing/sysfs-bus-cxl | 36 + Documentation/driver-api/cxl/memory-devices.rst | 315 ++++- drivers/cxl/Kconfig | 44 +- drivers/cxl/Makefile | 6 +- drivers/cxl/acpi.c | 152 +-- drivers/cxl/core/Makefile | 4 +- drivers/cxl/core/bus.c | 675 ---------- drivers/cxl/core/core.h | 2 + drivers/cxl/core/hdm.c | 276 ++++ drivers/cxl/core/memdev.c | 44 + drivers/cxl/core/pci.c | 96 ++ drivers/cxl/core/pmem.c | 18 +- drivers/cxl/core/port.c | 1568 +++++++++++++++++++++++ drivers/cxl/core/regs.c | 67 +- drivers/cxl/cxl.h | 197 ++- drivers/cxl/cxlmem.h | 39 + drivers/cxl/cxlpci.h | 75 ++ drivers/cxl/mem.c | 228 ++++ drivers/cxl/pci.c | 383 ++++-- drivers/cxl/pci.h | 34 - drivers/cxl/pmem.c | 12 +- drivers/cxl/port.c | 76 ++ drivers/nvdimm/nd-core.h | 2 +- lib/Kconfig.debug | 23 + tools/testing/cxl/Kbuild | 22 +- tools/testing/cxl/mock_acpi.c | 74 -- tools/testing/cxl/mock_mem.c | 10 + tools/testing/cxl/mock_pmem.c | 24 - tools/testing/cxl/test/cxl.c | 330 ++++- tools/testing/cxl/test/mem.c | 19 + tools/testing/cxl/test/mock.c | 91 +- tools/testing/cxl/test/mock.h | 8 +- 32 files changed, 3725 insertions(+), 1225 deletions(-) delete mode 100644 drivers/cxl/core/bus.c create mode 100644 drivers/cxl/core/hdm.c create mode 100644 drivers/cxl/core/pci.c create mode 100644 drivers/cxl/core/port.c create mode 100644 drivers/cxl/cxlpci.h create mode 100644 drivers/cxl/mem.c delete mode 100644 drivers/cxl/pci.h create mode 100644 drivers/cxl/port.c create mode 100644 tools/testing/cxl/mock_mem.c delete mode 100644 tools/testing/cxl/mock_pmem.c