Merge tag 'cxl-for-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl

Pull Compute Express Link (CXL) updates from Dan Williams:
 "To date Linux has been dependent on platform-firmware to map CXL RAM
  regions and handle events / errors from devices. With this update we
  can now parse / update the CXL memory layout, and report events /
  errors from devices. This is a precursor for the CXL subsystem to
  handle the end-to-end "RAS" flow for CXL memory. i.e. the flow that
  for DDR-attached-DRAM is handled by the EDAC driver where it maps
  system physical address events to a field-replaceable-unit (FRU /
  endpoint device). In general, CXL has the potential to standardize
  what has historically been a pile of memory-controller-specific error
  handling logic.

  Another change of note is the default policy for handling RAM-backed
  device-dax instances. Previously the default access mode was "device",
  mmap(2) a device special file to access memory. The new default is
  "kmem" where the address range is assigned to the core-mm via
  add_memory_driver_managed(). This saves typical users from wondering
  why their platform memory is not visible via free(1) and stuck behind
  a device-file. At the same time it allows expert users to deploy
  policy to, for example, get dedicated access to high performance
  memory, or hide low performance memory from general purpose kernel
  allocations. This affects not only CXL, but also systems with
  high-bandwidth-memory that platform-firmware tags with the
  EFI_MEMORY_SP (special purpose) designation.

  Summary:

   - CXL RAM region enumeration: instantiate 'struct cxl_region' objects
     for platform firmware created memory regions

   - CXL RAM region provisioning: complement the existing PMEM region
     creation support with RAM region support

   - "Soft Reservation" policy change: Online (memory hot-add)
     soft-reserved memory (EFI_MEMORY_SP) by default, but still allow
     for setting aside such memory for dedicated access via device-dax.

   - CXL Events and Interrupts: Takeover CXL event handling from
     platform-firmware (ACPI calls this CXL Memory Error Reporting) and
     export CXL Events via Linux Trace Events.

   - Convey CXL _OSC results to drivers: Similar to PCI, let the CXL
     subsystem interrogate the result of CXL _OSC negotiation.

   - Emulate CXL DVSEC Range Registers as "decoders": Allow for
     first-generation devices that pre-date the definition of the CXL
     HDM Decoder Capability to translate the CXL DVSEC Range Registers
     into 'struct cxl_decoder' objects.

   - Set timestamp: Per spec, set the device timestamp in case of
     hotplug, or if platform-firwmare failed to set it.

   - General fixups: linux-next build issues, non-urgent fixes for
     pre-production hardware, unit test fixes, spelling and debug
     message improvements"

* tag 'cxl-for-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl: (66 commits)
  dax/kmem: Fix leak of memory-hotplug resources
  cxl/mem: Add kdoc param for event log driver state
  cxl/trace: Add serial number to trace points
  cxl/trace: Add host output to trace points
  cxl/trace: Standardize device information output
  cxl/pci: Remove locked check for dvsec_range_allowed()
  cxl/hdm: Add emulation when HDM decoders are not committed
  cxl/hdm: Create emulated cxl_hdm for devices that do not have HDM decoders
  cxl/hdm: Emulate HDM decoder from DVSEC range registers
  cxl/pci: Refactor cxl_hdm_decode_init()
  cxl/port: Export cxl_dvsec_rr_decode() to cxl_port
  cxl/pci: Break out range register decoding from cxl_hdm_decode_init()
  cxl: add RAS status unmasking for CXL
  cxl: remove unnecessary calling of pci_enable_pcie_error_reporting()
  dax/hmem: build hmem device support as module if possible
  dax: cxl: add CXL_REGION dependency
  cxl: avoid returning uninitialized error code
  cxl/pmem: Fix nvdimm registration races
  cxl/mem: Fix UAPI command comment
  cxl/uapi: Tag commands from cxl_query_cmd()
  ...

1 files changed, 0 insertions, 112 deletions

diff --git a/include/trace/events/cxl.h b/include/trace/events/cxl.h
deleted file mode 100644
index ad085a2534ef..000000000000
--- a/include/trace/events/cxl.h
+++ /dev/null
@@ -1,112 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#undef TRACE_SYSTEM
-#define TRACE_SYSTEM cxl
-
-#if !defined(_CXL_EVENTS_H) || defined(TRACE_HEADER_MULTI_READ)
-#define _CXL_EVENTS_H
-
-#include <linux/tracepoint.h>
-
-#define CXL_HEADERLOG_SIZE		SZ_512
-#define CXL_HEADERLOG_SIZE_U32		SZ_512 / sizeof(u32)
-
-#define CXL_RAS_UC_CACHE_DATA_PARITY	BIT(0)
-#define CXL_RAS_UC_CACHE_ADDR_PARITY	BIT(1)
-#define CXL_RAS_UC_CACHE_BE_PARITY	BIT(2)
-#define CXL_RAS_UC_CACHE_DATA_ECC	BIT(3)
-#define CXL_RAS_UC_MEM_DATA_PARITY	BIT(4)
-#define CXL_RAS_UC_MEM_ADDR_PARITY	BIT(5)
-#define CXL_RAS_UC_MEM_BE_PARITY	BIT(6)
-#define CXL_RAS_UC_MEM_DATA_ECC		BIT(7)
-#define CXL_RAS_UC_REINIT_THRESH	BIT(8)
-#define CXL_RAS_UC_RSVD_ENCODE		BIT(9)
-#define CXL_RAS_UC_POISON		BIT(10)
-#define CXL_RAS_UC_RECV_OVERFLOW	BIT(11)
-#define CXL_RAS_UC_INTERNAL_ERR		BIT(14)
-#define CXL_RAS_UC_IDE_TX_ERR		BIT(15)
-#define CXL_RAS_UC_IDE_RX_ERR		BIT(16)
-
-#define show_uc_errs(status)	__print_flags(status, " | ",		  \
-	{ CXL_RAS_UC_CACHE_DATA_PARITY, "Cache Data Parity Error" },	  \
-	{ CXL_RAS_UC_CACHE_ADDR_PARITY, "Cache Address Parity Error" },	  \
-	{ CXL_RAS_UC_CACHE_BE_PARITY, "Cache Byte Enable Parity Error" }, \
-	{ CXL_RAS_UC_CACHE_DATA_ECC, "Cache Data ECC Error" },		  \
-	{ CXL_RAS_UC_MEM_DATA_PARITY, "Memory Data Parity Error" },	  \
-	{ CXL_RAS_UC_MEM_ADDR_PARITY, "Memory Address Parity Error" },	  \
-	{ CXL_RAS_UC_MEM_BE_PARITY, "Memory Byte Enable Parity Error" },  \
-	{ CXL_RAS_UC_MEM_DATA_ECC, "Memory Data ECC Error" },		  \
-	{ CXL_RAS_UC_REINIT_THRESH, "REINIT Threshold Hit" },		  \
-	{ CXL_RAS_UC_RSVD_ENCODE, "Received Unrecognized Encoding" },	  \
-	{ CXL_RAS_UC_POISON, "Received Poison From Peer" },		  \
-	{ CXL_RAS_UC_RECV_OVERFLOW, "Receiver Overflow" },		  \
-	{ CXL_RAS_UC_INTERNAL_ERR, "Component Specific Error" },	  \
-	{ CXL_RAS_UC_IDE_TX_ERR, "IDE Tx Error" },			  \
-	{ CXL_RAS_UC_IDE_RX_ERR, "IDE Rx Error" }			  \
-)
-
-TRACE_EVENT(cxl_aer_uncorrectable_error,
-	TP_PROTO(const struct device *dev, u32 status, u32 fe, u32 *hl),
-	TP_ARGS(dev, status, fe, hl),
-	TP_STRUCT__entry(
-		__string(dev_name, dev_name(dev))
-		__field(u32, status)
-		__field(u32, first_error)
-		__array(u32, header_log, CXL_HEADERLOG_SIZE_U32)
-	),
-	TP_fast_assign(
-		__assign_str(dev_name, dev_name(dev));
-		__entry->status = status;
-		__entry->first_error = fe;
-		/*
-		 * Embed the 512B headerlog data for user app retrieval and
-		 * parsing, but no need to print this in the trace buffer.
-		 */
-		memcpy(__entry->header_log, hl, CXL_HEADERLOG_SIZE);
-	),
-	TP_printk("%s: status: '%s' first_error: '%s'",
-		  __get_str(dev_name),
-		  show_uc_errs(__entry->status),
-		  show_uc_errs(__entry->first_error)
-	)
-);
-
-#define CXL_RAS_CE_CACHE_DATA_ECC	BIT(0)
-#define CXL_RAS_CE_MEM_DATA_ECC		BIT(1)
-#define CXL_RAS_CE_CRC_THRESH		BIT(2)
-#define CLX_RAS_CE_RETRY_THRESH		BIT(3)
-#define CXL_RAS_CE_CACHE_POISON		BIT(4)
-#define CXL_RAS_CE_MEM_POISON		BIT(5)
-#define CXL_RAS_CE_PHYS_LAYER_ERR	BIT(6)
-
-#define show_ce_errs(status)	__print_flags(status, " | ",			\
-	{ CXL_RAS_CE_CACHE_DATA_ECC, "Cache Data ECC Error" },			\
-	{ CXL_RAS_CE_MEM_DATA_ECC, "Memory Data ECC Error" },			\
-	{ CXL_RAS_CE_CRC_THRESH, "CRC Threshold Hit" },				\
-	{ CLX_RAS_CE_RETRY_THRESH, "Retry Threshold" },				\
-	{ CXL_RAS_CE_CACHE_POISON, "Received Cache Poison From Peer" },		\
-	{ CXL_RAS_CE_MEM_POISON, "Received Memory Poison From Peer" },		\
-	{ CXL_RAS_CE_PHYS_LAYER_ERR, "Received Error From Physical Layer" }	\
-)
-
-TRACE_EVENT(cxl_aer_correctable_error,
-	TP_PROTO(const struct device *dev, u32 status),
-	TP_ARGS(dev, status),
-	TP_STRUCT__entry(
-		__string(dev_name, dev_name(dev))
-		__field(u32, status)
-	),
-	TP_fast_assign(
-		__assign_str(dev_name, dev_name(dev));
-		__entry->status = status;
-	),
-	TP_printk("%s: status: '%s'",
-		  __get_str(dev_name), show_ce_errs(__entry->status)
-	)
-);
-
-#endif /* _CXL_EVENTS_H */
-
-/* This part must be outside protection */
-#undef TRACE_INCLUDE_FILE
-#define TRACE_INCLUDE_FILE cxl
-#include <trace/define_trace.h>