Messages in this thread | | | From | alison.schofield@intel ... | Subject | [PATCH v9 0/6] CXL Poison List Retrieval & Tracing | Date | Sun, 19 Mar 2023 21:31:45 -0700 |
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From: Alison Schofield <alison.schofield@intel.com>
Changes in v9:
Patch 3: cxl/memdev: Add trigger_poison_list sysfs attribute - Make trigger_poison_list a driver attribute to protect against unbinds while poison is being read. (Dan)
Patch 4: cxl/region: Provide region info to the cxl_poison trace event - Remove already held cxl_dpa_rwsem in cxl_get_poison_by_endpoint() (Ira) - Add hold of cxl_region_rwsem in cxl_get_poison_by_endpoint() - Move the 'remains' handling to memdev driver (Ira) Previously, after the region driver read poison for the last committed endpoint decoder, it also read poison for remaining unmapped resources. Add a context struct to pass the poison read state between memdev and region drivers, so that memdev driver can complete the poison read of unmapped resources.
Patches 1,2,5,6: no changes.
Link to v8: https://lore.kernel.org/linux-cxl/cover.1678468593.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: $ echo 1 > /sys/bus/cxl/devices/mem0/trigger_poison_list cxl_poison: memdev=mem0 host=cxl_mem.0 serial=0 region=region4 region_uuid=117b2cf4-b160-4090-9361-ba31b9649317 hpa=0xf0d0000000 dpa=0x40000000 length=0x40 source=Internal flags= overflow_time=0
[1]: https://www.computeexpresslink.org/download-the-specification
Alison Schofield (6): 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: Provide region info to the cxl_poison trace event cxl/trace: Add an HPA to cxl_poison trace events tools/testing/cxl: Mock support for Get Poison List
Documentation/ABI/testing/sysfs-bus-cxl | 14 +++ drivers/cxl/core/core.h | 11 +++ drivers/cxl/core/mbox.c | 74 ++++++++++++++++ drivers/cxl/core/memdev.c | 108 ++++++++++++++++++++++++ drivers/cxl/core/region.c | 63 ++++++++++++++ drivers/cxl/core/trace.c | 94 +++++++++++++++++++++ drivers/cxl/core/trace.h | 91 ++++++++++++++++++++ drivers/cxl/cxlmem.h | 72 +++++++++++++++- drivers/cxl/mem.c | 36 ++++++++ drivers/cxl/pci.c | 4 + tools/testing/cxl/test/mem.c | 42 +++++++++ 11 files changed, 608 insertions(+), 1 deletion(-)
base-commit: e686c32590f40bffc45f105c04c836ffad3e531a -- 2.37.3
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