Alison Schofield 0e33ac9c3f cxl/memdev: Hold region_rwsem during inject and clear poison ops ... Poison inject and clear are supported via debugfs where a privileged user can inject and clear poison to a device physical address. Commit 458ba8189c ("cxl: Add cxl_decoders_committed() helper") added a lockdep assert that highlighted a gap in poison inject and clear functions where holding the dpa_rwsem does not assure that a a DPA is not added to a region. The impact for inject and clear is that if the DPA address being injected or cleared has been attached to a region, but not yet committed, the dev_dbg() message intended to alert the debug user that they are acting on a mapped address is not emitted. Also, the cxl_poison trace event that serves as a log of the inject and clear activity will not include region info. Close this gap by snapshotting an unchangeable region state during poison inject and clear operations. That means holding both the region_rwsem and the dpa_rwsem during the inject and clear ops. Fixes: d2fbc48658 ("cxl/memdev: Add support for the Inject Poison mailbox command") Fixes: 9690b07748 ("cxl/memdev: Add support for the Clear Poison mailbox command") Signed-off-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Davidlohr Bueso <dave@stgolabs.net> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/08721dc1df0a51e4e38fecd02425c3475912dfd5.1701041440.git.alison.schofield@intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>		2023-11-29 17:23:03 -08:00
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core	cxl/memdev: Hold region_rwsem during inject and clear poison ops	2023-11-29 17:23:03 -08:00
acpi.c	cxl: Export QTG ids from CFMWS to sysfs as qos_class attribute	2023-10-27 20:48:02 -07:00
cxl.h	Merge branch 'for-6.7/cxl-commited' into cxl/next	2023-10-31 11:00:08 -07:00
cxlmem.h	Merge branch 'for-6.7/cxl-rch-eh' into cxl/next	2023-10-31 10:59:00 -07:00
cxlpci.h	cxl/pci: Find and register CXL PMU devices	2023-05-30 11:20:35 -07:00
Kconfig	cxl: fix CONFIG_FW_LOADER dependency	2023-07-14 14:32:22 -06:00
Makefile	cxl/pmem: Introduce nvdimm_security_ops with ->get_flags() operation	2022-11-30 16:30:47 -08:00
mem.c	cxl/pci: Add RCH downstream port AER register discovery	2023-10-27 20:13:38 -07:00
pci.c	Merge branch 'for-6.7/cxl' into cxl/next	2023-10-31 10:59:44 -07:00
pmem.c	cxl/mbox: Move mailbox related driver state to its own data structure	2023-06-25 14:31:08 -07:00
pmu.h	cxl/pci: Find and register CXL PMU devices	2023-05-30 11:20:35 -07:00
port.c	cxl: Add support for reading CXL switch CDAT table	2023-10-27 20:48:02 -07:00
security.c	Merge branch 'for-6.5/cxl-type-2' into for-6.5/cxl	2023-06-25 17:16:51 -07:00