platform/x86/intel/ifs: Add IFS sysfs interface

mainline inclusion
from mainline-v5.19-rc1
commit 6f33a92b
category: feature
feature: Intel In Filed Scan(IFS)
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I651S7
CVE: N/A
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/


commit/?id=6f33a92b

Intel-SIG: commit 6f33a92b ("platform/x86/intel/ifs: Add IFS sysfs interface")

-------------------------------------

platform/x86/intel/ifs: Add IFS sysfs interface

Implement sysfs interface to trigger ifs test for a specific cpu.
Additional interfaces related to checking the status of the
scan test and seeing the version of the loaded IFS binary
are also added.

The basic usage is as below.
   - To start test, for example on cpu5:
       echo 5 > /sys/devices/platform/intel_ifs/run_test
   - To see the status of the last test
       cat /sys/devices/platform/intel_ifs/status
   - To see the version of the loaded scan binary
       cat /sys/devices/platform/intel_ifs/image_version

Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jithu Joseph <jithu.joseph@intel.com>
Co-developed-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20220506225410.1652287-10-tony.luck@intel.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Aichun Shi <aichun.shi@intel.com>