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Subject[GIT PULL] Compute Express Link (CXL) for 6.2
Hi Linus, please pull from:

git:// tags/cxl-for-6.2 receive the CXL update for v6.2.

While it may seem backwards, the CXL update this time around includes
some focus on CXL 1.x enabling where the work to date had been with CXL
2.0 (VH topologies) in mind. First generation CXL can mostly be
supported via BIOS, similar to DDR, however it became clear there are
use cases for OS native CXL error handling and some CXL 3.0 endpoint
features can be deployed on CXL 1.x hosts (Restricted CXL Host (RCH)
topologies). So, this update brings RCH topologies into the Linux CXL
device model.

In support of the ongoing CXL 2.0+ enabling 2 new core kernel
facilities are added. One is the ability for the kernel to flag
collisions between userspace access to PCI configuration registers and
kernel accesses. This is brought on by the PCIe Data-Object-Exchange
(DOE) facility, a hardware mailbox over config-cycles. The other is a
cpu_cache_invalidate_memregion() API that maps to wbinvd_on_all_cpus()
on x86. To prevent abuse it is disabled in guest VMs and architectures
that do not support it yet. The CXL paths that need it, dynamic memory
region creation and security commands (erase / unlock), are disabled
when it is not present.

As for the CXL 2.0+ this cycle the subsystem gains support Persistent
Memory Security commands, error handling in response to PCIe AER
notifications, and support for the "XOR" host bridge interleave

That last feature, "XOR" interleave support, is built on top of the
ACPICA update for this cycle [1]. The shortlog and diffstat below are
from a test merge with the pending ACPI updates. So either pull the ACPI
tree first, or understand you will get some unrelated ACPICA updates in
this pull.

This has all appeared in -next with no known outstanding issues. The
x86, ACPI, and PCI touches have acks from their respective maintainers.

[1]: f350c68e3cd5 ("ACPICA: Add CXL 3.0 structures (CXIMS & RDPAS) to the CEDT table")


The following changes since commit f0c4d9fc9cc9462659728d168387191387e903cc:

Linux 6.1-rc4 (2022-11-06 15:07:11 -0800)

are available in the Git repository at:

git:// tags/cxl-for-6.2

for you to fetch changes up to f04facfb993de47e2133b2b842d72b97b1c50162:

cxl/region: Fix memdev reuse check (2022-12-08 13:03:47 -0800)

cxl for 6.2

- Add the cpu_cache_invalidate_memregion() API for cache flushing in
response to physical memory reconfiguration, or memory-side data
invalidation from operations like secure erase or memory-device unlock.

- Add a facility for the kernel to warn about collisions between kernel
and userspace access to PCI configuration registers

- Add support for Restricted CXL Host (RCH) topologies (formerly CXL 1.1)

- Add handling and reporting of CXL errors reported via the PCIe AER

- Add support for CXL Persistent Memory Security commands

- Add support for the "XOR" algorithm for CXL host bridge interleave

- Rework / simplify CXL to NVDIMM interactions

- Miscellaneous cleanups and fixes


Adam Manzanares (1):
cxl: Replace HDM decoder granularity magic numbers

Alison Schofield (3):
cxl/acpi: Support CXL XOR Interleave Math (CXIMS)
tools/testing/cxl: Add XOR Math support to cxl_test
cxl/acpi: Fail decoder add if CXIMS for HBIG is missing

Colin Ian King (1):
cxl/region: Fix spelling mistake "memergion" -> "memregion"

Dan Williams (34):
tools/testing/cxl: Add bridge mocking support
cxl/acpi: Simplify cxl_nvdimm_bridge probing
cxl/region: Drop redundant pmem region release handling
cxl/pmem: Refactor nvdimm device registration, delete the workqueue
cxl/pmem: Remove the cxl_pmem_wq and related infrastructure
cxl/acpi: Move rescan to the workqueue
tools/testing/cxl: Make mock CEDT parsing more robust
cxl/region: Fix missing probe failure
cxl/pmem: Enforce keyctl ABI for PMEM security
nvdimm/region: Move cache management to the region driver
cxl/region: Manage CPU caches relative to DPA invalidation events
cxl/pci: Cleanup repeated code in cxl_probe_regs() helpers
cxl/pci: Cleanup cxl_map_device_regs()
cxl/pci: Kill cxl_map_regs()
cxl/core/regs: Make cxl_map_{component, device}_regs() device generic
cxl/port: Limit the port driver to just the HDM Decoder Capability
cxl/pci: Prepare for mapping RAS Capability Structure
cxl/pci: Find and map the RAS Capability Structure
cxl/pci: Add (hopeful) error handling support
Merge "ACPICA: Add CXL 3.0 structures..." into for-6.2/cxl-xor
cxl/mem: Move devm_cxl_add_endpoint() from cxl_core to cxl_mem
cxl/port: Add RCD endpoint port enumeration
tools/testing/cxl: Add an RCH topology
Merge branch 'for-6.2/cxl-security' into for-6.2/cxl
Merge branch 'for-6.2/cxl-aer' into for-6.2/cxl
Merge branch 'for-6.2/cxl-xor' into for-6.2/cxl
cxl/regs: Fix sparse warning
tools/testing/cxl: Require cache invalidation bypass
cxl/security: Fix Get Security State output payload endian handling
cxl/mbox: Enable cxl_mbox_send_cmd() users to validate output size
cxl/mbox: Add variable output size validation for internal commands
cxl/security: Drop security command ioctl uapi
cxl/pci: Add some type-safety to the AER trace points
cxl/pci: Remove endian confusion

Dave Jiang (23):
cxl/pmem: Introduce nvdimm_security_ops with ->get_flags() operation
tools/testing/cxl: Add "Get Security State" opcode support
cxl/pmem: Add "Set Passphrase" security command support
tools/testing/cxl: Add "Set Passphrase" opcode support
cxl/pmem: Add Disable Passphrase security command support
tools/testing/cxl: Add "Disable" security opcode support
cxl/pmem: Add "Freeze Security State" security command support
tools/testing/cxl: Add "Freeze Security State" security opcode support
cxl/pmem: Add "Unlock" security command support
tools/testing/cxl: Add "Unlock" security opcode support
cxl/pmem: Add "Passphrase Secure Erase" security command support
tools/testing/cxl: Add "passphrase secure erase" opcode support
nvdimm/cxl/pmem: Add support for master passphrase disable security command
cxl/pmem: add id attribute to CXL based nvdimm
tools/testing/cxl: add mechanism to lock mem device for testing
cxl/pmem: add provider name to cxl pmem dimm attribute group
libnvdimm: Introduce CONFIG_NVDIMM_SECURITY_TEST flag
cxl: add dimm_id support for __nvdimm_create()
cxl/pci: add tracepoint events for CXL RAS
PCI/AER: Add optional logging callback for correctable error
cxl/pci: Add callback to log AER correctable error
cxl: update names for interleave granularity conversion macros
cxl: update names for interleave ways conversion macros

Davidlohr Bueso (1):
memregion: Add cpu_cache_invalidate_memregion() interface

Fan Ni (1):
cxl/region: Fix memdev reuse check

Ira Weiny (2):
PCI: Allow drivers to request exclusive config regions
cxl/doe: Request exclusive DOE access

Robert Richter (8):
cxl/core: Remove duplicate declaration of devm_cxl_iomap_block()
cxl/core: Check physical address before mapping it in devm_cxl_iomap_block()
cxl: Unify debug messages when calling devm_cxl_add_port()
cxl: Unify debug messages when calling devm_cxl_add_dport()
cxl/acpi: Improve debug messages in cxl_acpi_probe()
cxl/ACPI: Register CXL host ports by bridge device
cxl/acpi: Extract component registers of restricted hosts from RCRB
cxl/acpi: Warn about an invalid CHBCR in an existing CHBS entry

Terry Bowman (1):
cxl/acpi: Set ACPI's CXL _OSC to indicate RCD mode support

Documentation/ABI/testing/sysfs-bus-nvdimm | 14 +
Documentation/PCI/pci-error-recovery.rst | 7 +
arch/x86/Kconfig | 1 +
arch/x86/mm/pat/set_memory.c | 18 ++
drivers/acpi/nfit/intel.c | 30 +-
drivers/acpi/pci_root.c | 1 +
drivers/cxl/Kconfig | 18 ++
drivers/cxl/Makefile | 2 +-
drivers/cxl/acpi.c | 275 ++++++++++++++---
drivers/cxl/core/core.h | 8 -
drivers/cxl/core/hdm.c | 45 +--
drivers/cxl/core/mbox.c | 102 ++++---
drivers/cxl/core/memdev.c | 1 +
drivers/cxl/core/pci.c | 5 +-
drivers/cxl/core/pmem.c | 109 ++++---
drivers/cxl/core/port.c | 216 +++++++++-----
drivers/cxl/core/region.c | 112 ++++++-
drivers/cxl/core/regs.c | 242 ++++++++++-----
drivers/cxl/cxl.h | 140 +++++----
drivers/cxl/cxlmem.h | 64 +++-
drivers/cxl/cxlpci.h | 9 -
drivers/cxl/mem.c | 74 ++++-
drivers/cxl/pci.c | 228 ++++++++++++---
drivers/cxl/pmem.c | 407 ++++++--------------------
drivers/cxl/security.c | 202 +++++++++++++
drivers/nvdimm/Kconfig | 12 +
drivers/nvdimm/dimm_devs.c | 9 +-
drivers/nvdimm/region.c | 11 +
drivers/nvdimm/region_devs.c | 50 +++-
drivers/nvdimm/security.c | 43 ++-
drivers/pci/pci-sysfs.c | 7 +
drivers/pci/pcie/aer.c | 8 +-
drivers/pci/probe.c | 6 +
include/linux/ioport.h | 2 +
include/linux/libnvdimm.h | 7 +
include/linux/memregion.h | 38 +++
include/linux/pci.h | 20 ++
include/trace/events/cxl.h | 112 +++++++
include/uapi/linux/pci_regs.h | 1 +
kernel/resource.c | 13 +-
lib/Kconfig | 3 +
tools/testing/cxl/Kbuild | 2 +
tools/testing/cxl/config_check.c | 2 +
tools/testing/cxl/test/cxl.c | 303 +++++++++++++++++--
tools/testing/cxl/test/mem.c | 453 ++++++++++++++++++++++++++++-
tools/testing/cxl/test/mock.c | 19 ++
tools/testing/cxl/test/mock.h | 3 +
tools/testing/nvdimm/Kbuild | 1 -
tools/testing/nvdimm/dimm_devs.c | 30 --
49 files changed, 2649 insertions(+), 836 deletions(-)
create mode 100644 drivers/cxl/security.c
create mode 100644 include/trace/events/cxl.h
delete mode 100644 tools/testing/nvdimm/dimm_devs.c

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