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cxl/pmem: Add "Passphrase Secure Erase" security command support

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Create callback function to support the nvdimm_security_ops() ->erase()
callback. Translate the operation to send "Passphrase Secure Erase"
security command for CXL memory device.

When the mem device is secure erased, cpu_cache_invalidate_memregion() is
called in order to invalidate all CPU caches before attempting to access
the mem device again.

See CXL 3.0 spec section 8.2.9.8.6.6 for reference.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/166983615293.2734609.10358657600295932156.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dave Jiang 2022-11-30 12:22:32 -07:00 • committed by Dan Williams
parent 8e80b18664
commit 3b502e886d
4 changed files with 39 additions and 0 deletions
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1
include/uapi/linux/cxl_mem.h
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@ -46,6 +46,7 @@
___C(DISABLE_PASSPHRASE, "Disable Passphrase"), \
___C(FREEZE_SECURITY, "Freeze Security"), \
___C(UNLOCK, "Unlock"), \
___C(PASSPHRASE_SECURE_ERASE, "Passphrase Secure Erase"), \
___C(MAX, "invalid / last command")
#define ___C(a, b) CXL_MEM_COMMAND_ID_##a