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. [1]: https://www.youtube.com/watch?v=QMF3rqhjYuM Kconfig for this driver selects CONFIG_INTEL_IFS_DEVICE so the base kernel will be built with code to create the device to which this driver will attach. Reviewed-by: Dan Williams <dan.j.williams@xxxxxxxxx> Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx> --- Not using module_platform_driver() for this simple stub because later patches need to add init()/exit() functions. --- drivers/platform/x86/intel/ifs/Kconfig | 14 ++++++++++++ drivers/platform/x86/intel/ifs/Makefile | 4 ++++ drivers/platform/x86/intel/ifs/core.c | 29 +++++++++++++++++++++++++ 3 files changed, 47 insertions(+) create mode 100644 drivers/platform/x86/intel/ifs/core.c diff --git a/drivers/platform/x86/intel/ifs/Kconfig b/drivers/platform/x86/intel/ifs/Kconfig index 51325b699563..0aa5ecc5ef42 100644 --- a/drivers/platform/x86/intel/ifs/Kconfig +++ b/drivers/platform/x86/intel/ifs/Kconfig @@ -1,2 +1,16 @@ config INTEL_IFS_DEVICE bool + +config INTEL_IFS + tristate "Intel In Field Scan" + depends on X86 && 64BIT && SMP + select INTEL_IFS_DEVICE + help + Enable support for the In Field Scan capability in select + CPUs. The capability allows for running low level tests via + a scan image distributed by Intel via Github to validate CPU + operation beyond baseline RAS capabilities. To compile this + driver as a module, choose M here. The module will be called + intel_ifs. + + If unsure, say N. diff --git a/drivers/platform/x86/intel/ifs/Makefile b/drivers/platform/x86/intel/ifs/Makefile index 12c2f5ce9925..bf8adc57892c 100644 --- a/drivers/platform/x86/intel/ifs/Makefile +++ b/drivers/platform/x86/intel/ifs/Makefile @@ -1 +1,5 @@ obj-$(CONFIG_INTEL_IFS_DEVICE) += intel_ifs_device.o + +obj-$(CONFIG_INTEL_IFS) += intel_ifs.o + +intel_ifs-objs := core.o diff --git a/drivers/platform/x86/intel/ifs/core.c b/drivers/platform/x86/intel/ifs/core.c new file mode 100644 index 000000000000..eb34b877dac0 --- /dev/null +++ b/drivers/platform/x86/intel/ifs/core.c @@ -0,0 +1,29 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Copyright(c) 2022 Intel Corporation. */ + +#include <linux/module.h> +#include <linux/platform_device.h> + +static struct platform_driver intel_ifs_driver = { + .driver = { + .name = "intel_ifs", + }, +}; + +static int __init ifs_init(void) +{ + return platform_driver_register(&intel_ifs_driver); +} + +static void __exit ifs_exit(void) +{ + platform_driver_unregister(&intel_ifs_driver); +} + +module_init(ifs_init); +module_exit(ifs_exit); + +MODULE_ALIAS("platform:intel_ifs*"); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Intel In Field Scan (IFS) driver"); -- 2.35.1
