cxl/pmem: Add Disable Passphrase security command support
authorDave Jiang <dave.jiang@intel.com>
Wed, 30 Nov 2022 19:21:58 +0000 (12:21 -0700)
committerDan Williams <dan.j.williams@intel.com>
Thu, 1 Dec 2022 20:42:35 +0000 (12:42 -0800)
commitc4ef680d0b72815003a76074ca1cd872a2fecfc3
tree05f81d3119637683afa6d771639a9621fc3cf491
parent53d2ce6e7869d369d8bbed3bd8a3d2c9758cf7c7
cxl/pmem: Add Disable Passphrase security command support

Create callback function to support the nvdimm_security_ops ->disable()
callback. Translate the operation to send "Disable Passphrase" security
command for CXL memory device. The operation supports disabling a
passphrase for the CXL persistent memory device. In the original
implementation of nvdimm_security_ops, this operation only supports
disabling of the user passphrase. This is due to the NFIT version of
disable passphrase only supported disabling of user passphrase. The CXL
spec allows disabling of the master passphrase as well which
nvidmm_security_ops does not support yet. In this commit, the callback
function will only support user passphrase.

See CXL rev3.0 spec section 8.2.9.8.6.3 for reference.

Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/166983611878.2734609.10602135274526390127.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
drivers/cxl/core/mbox.c
drivers/cxl/cxlmem.h
drivers/cxl/security.c
include/uapi/linux/cxl_mem.h