cxl/pci: Set the device timestamp

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CXL r3.0 section 8.2.9.4.2 "Set Timestamp" recommends that the host sets
the timestamp after every Conventional or CXL Reset to ensure accurate
timestamps. This should include on initial boot up. The time base that
is being set is used by a device for the poison list overflow timestamp
and all event timestamps.  Note that the command is optional and if
not supported and the device cannot return accurate timestamps it will
fill the fields in with an appropriate marker (see the specification
description of each timestamp).

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20230130151327.32415-1-Jonathan.Cameron@huawei.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

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Jonathan Cameron 2023-01-30 15:13:27 +00:00 • committed by Dan Williams

parent 7ebf38c911

commit fa8843451b

3 changed files with 40 additions and 0 deletions

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27

drivers/cxl/core/mbox.c

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9

drivers/cxl/cxlmem.h

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4

drivers/cxl/pci.c

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