cxl/mem: Support Secure Erase

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Implement support for the non-pmem exclusive secure erase, per
CXL specs. Create a write-only 'security/erase' sysfs file to
perform the requested operation.

As with the sanitation this requires the device being offline
and thus no active HPA-DPA decoding.

The expectation is that userspace can use it such as:

	cxl disable-memdev memX
	echo 1 > /sys/bus/cxl/devices/memX/security/erase
	cxl enable-memdev memX

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Fan Ni <fan.ni@samsung.com>
Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Link: https://lore.kernel.org/r/20230612181038.14421-7-dave@stgolabs.net
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

...

This commit is contained in:

Davidlohr Bueso 2023-06-12 11:10:37 -07:00 • committed by Dan Williams

parent c5c39217ff

commit 180ffd338c

4 changed files with 44 additions and 1 deletions

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10

Documentation/ABI/testing/sysfs-bus-cxl

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6

drivers/cxl/core/mbox.c

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28

drivers/cxl/core/memdev.c

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1

drivers/cxl/cxlmem.h

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