linux-dev/drivers/platform/x86/intel/ifs/Kconfig, branch master

platform/x86/intel/ifs: Mark as BROKEN

2022-07-10T15:41:06Z

A recent suggested change to the IFS code has shown that the userspace API needs a bit more work, see: https://lore.kernel.org/platform-driver-x86/20220708151938.986530-1-jithu.joseph@intel.com/ Mark it as BROKEN before 5.19 ships, to give ourselves one more kernel-devel cycle to get the userspace API right. Link: https://lore.kernel.org/platform-driver-x86/20220708151938.986530-1-jithu.joseph@intel.com/ Cc: Jithu Joseph Cc: Ashok Raj Cc: Tony Luck Suggested-by: Greg KH Signed-off-by: Hans de Goede Acked-by: Greg Kroah-Hartman Link: https://lore.kernel.org/r/20220710140736.6492-1-hdegoede@redhat.com

platform/x86/intel/ifs: Add CPU_SUP_INTEL dependency

2022-05-19T17:46:25Z

The driver is using functions from a compilation unit which is enabled by CONFIG_CPU_SUP_INTEL. Add that dependency to Kconfig explicitly otherwise: drivers/platform/x86/intel/ifs/load.o: in function `ifs_load_firmware': load.c:(.text+0x3b8): undefined reference to `intel_cpu_collect_info' Reported-by: Randy Dunlap Signed-off-by: Borislav Petkov Link: https://lore.kernel.org/r/YoZay8YR0zRGyVu+@zn.tnic Signed-off-by: Hans de Goede

platform/x86/intel/ifs: Add stub driver for In-Field Scan

2022-05-12T13:35:29Z

Cloud Service Providers that operate fleets of servers have reported [1] occasions where they can detect that a CPU has gone bad due to effects like electromigration, or isolated manufacturing defects. However, that detection method is A/B testing seemingly random application failures looking for a pattern. In-Field Scan (IFS) is a driver for a platform capability to load a crafted 'scan image' to run targeted low level diagnostics outside of the CPU's architectural error detection capabilities. Stub version of driver just does initial part of check for the IFS feature. MSR_IA32_CORE_CAPS must enumerate the presence of the MSR_INTEGRITY_CAPS MSR. [1]: https://www.youtube.com/watch?v=QMF3rqhjYuM Reviewed-by: Dan Williams Signed-off-by: Tony Luck Acked-by: Hans de Goede Reviewed-by: Greg Kroah-Hartman Reviewed-by: Thomas Gleixner Link: https://lore.kernel.org/r/20220506225410.1652287-5-tony.luck@intel.com Signed-off-by: Hans de Goede