From 15a8348707ffd2a37516db9bede88cc0bb467e0b Mon Sep 17 00:00:00 2001 From: Dave Jiang Date: Wed, 30 Nov 2022 12:23:07 -0700 Subject: libnvdimm: Introduce CONFIG_NVDIMM_SECURITY_TEST flag nfit_test overrode the security_show() sysfs attribute function in nvdimm dimm_devs in order to allow testing of security unlock. With the introduction of CXL security commands, the trick to override security_show() becomes significantly more complicated. By introdcing a security flag CONFIG_NVDIMM_SECURITY_TEST, libnvdimm can just toggle the check via a compile option. In addition the original override can can be removed from tools/testing/nvdimm/. The flag will also be used to bypass cpu_cache_invalidate_memregion() when set in a different commit. This allows testing on QEMU with nfit_test or cxl_test since cpu_cache_has_invalidate_memregion() checks whether X86_FEATURE_HYPERVISOR cpu feature flag is set on x86. Reviewed-by: Jonathan Cameron Signed-off-by: Dave Jiang Link: https://lore.kernel.org/r/166983618758.2734609.18031639517065867138.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Dan Williams --- drivers/nvdimm/Kconfig | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/nvdimm/Kconfig') diff --git a/drivers/nvdimm/Kconfig b/drivers/nvdimm/Kconfig index 5a29046e3319..79d93126453d 100644 --- a/drivers/nvdimm/Kconfig +++ b/drivers/nvdimm/Kconfig @@ -114,4 +114,16 @@ config NVDIMM_TEST_BUILD core devm_memremap_pages() implementation and other infrastructure. +config NVDIMM_SECURITY_TEST + bool "Enable NVDIMM security unit tests" + depends on NVDIMM_KEYS + help + The NVDIMM and CXL subsystems support unit testing of their device + security state machines. The NVDIMM_SECURITY_TEST option disables CPU + cache maintenance operations around events like secure erase and + overwrite. Also, when enabled, the NVDIMM subsystem core helps the unit + test implement a mock state machine. + + Select N if unsure. + endif -- cgit v1.2.3