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From: Alison Schofield <alison.schofield@intel.com>

Subject: [PATCH v5 0/5] CXL Poison List Retrieval & Tracing

Changes in v5:
- Rebase on cxl/next
- Use struct_size() to calc mbox cmd payload .min_out
- s/INTERNAL/INJECTED mocked poison record source
- Added Jonathan Reviewed-by tag on Patch 3

Link to v4:
https://lore.kernel.org/linux-cxl/cover.1671135967.git.alison.schofield@intel.com/

Add support for retrieving device poison lists and store the returned
error records as kernel trace events.

The handling of the poison list is guided by the CXL 3.0 Specification
Section 8.2.9.8.4.1. [1]

Example, triggered by memdev:
$ echo 1 > /sys/bus/cxl/devices/mem3/trigger_poison_list
cxl_poison: memdev=mem3 pcidev=cxl_mem.3 region= region_uuid=00000000-0000-0000-0000-000000000000 dpa=0x0 length=0x40 source=Internal flags= overflow_time=0

Example, triggered by region:
$ echo 1 > /sys/bus/cxl/devices/region5/trigger_poison_list
cxl_poison: memdev=mem0 pcidev=cxl_mem.0 region=region5 region_uuid=bfcb7a29-890e-4a41-8236-fe22221fc75c dpa=0x0 length=0x40 source=Internal flags= overflow_time=0
cxl_poison: memdev=mem1 pcidev=cxl_mem.1 region=region5 region_uuid=bfcb7a29-890e-4a41-8236-fe22221fc75c dpa=0x0 length=0x40 source=Internal flags= overflow_time=0

[1]: https://www.computeexpresslink.org/download-the-specification

Alison Schofield (5):
cxl/mbox: Add GET_POISON_LIST mailbox command
cxl/trace: Add TRACE support for CXL media-error records
cxl/memdev: Add trigger_poison_list sysfs attribute
cxl/region: Add trigger_poison_list sysfs attribute
tools/testing/cxl: Mock support for Get Poison List

Documentation/ABI/testing/sysfs-bus-cxl | 28 +++++++++
drivers/cxl/core/mbox.c | 78 +++++++++++++++++++++++
drivers/cxl/core/memdev.c | 45 ++++++++++++++
drivers/cxl/core/region.c | 33 ++++++++++
drivers/cxl/core/trace.h | 83 +++++++++++++++++++++++++
drivers/cxl/cxlmem.h | 69 +++++++++++++++++++-
drivers/cxl/pci.c | 4 ++
tools/testing/cxl/test/mem.c | 42 +++++++++++++
8 files changed, 381 insertions(+), 1 deletion(-)


base-commit: 589c3357370a596ef7c99c00baca8ac799fce531
--
2.37.3

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