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PPIN is the Protected Processor Identification Number. This is used to identify the socket as a Field Replaceable Unit (FRU). Existing code only displays this when reporting errors. But this makes it inconvenient for large clusters to use it for its intended purpose of inventory control. Add ppin to /sys/devices/system/cpu/cpu*/topology to make what is already available using RDMSR more easily accessible. Make the file read only for root in case there are still people concerned about making a unique system "serial number" available. Signed-off-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20220131230111.2004669-6-tony.luck@intel.com
5.7 KiB
What: /sys/devices/system/cpu/dscr_default Date: 13-May-2014 KernelVersion: v3.15.0 Contact: Description: Writes are equivalent to writing to /sys/devices/system/cpu/cpuN/dscr on all CPUs. Reads return the last written value or 0. This value is not a global default: it is a way to set all per-CPU defaults at the same time. Values: 64 bit unsigned integer (bit field)
What: /sys/devices/system/cpu/cpu[0-9]+/dscr Date: 13-May-2014 KernelVersion: v3.15.0 Contact: Description: Default value for the Data Stream Control Register (DSCR) on a CPU. This default value is used when the kernel is executing and for any process that has not set the DSCR itself. If a process ever sets the DSCR (via direct access to the SPR) that value will be persisted for that process and used on any CPU where it executes (overriding the value described here). If set by a process it will be inherited by child processes. Values: 64 bit unsigned integer (bit field)
What: /sys/devices/system/cpu/cpuX/topology/physical_package_id Description: physical package id of cpuX. Typically corresponds to a physical socket number, but the actual value is architecture and platform dependent. Values: integer
What: /sys/devices/system/cpu/cpuX/topology/die_id Description: the CPU die ID of cpuX. Typically it is the hardware platform's identifier (rather than the kernel's). The actual value is architecture and platform dependent. Values: integer
What: /sys/devices/system/cpu/cpuX/topology/core_id Description: the CPU core ID of cpuX. Typically it is the hardware platform's identifier (rather than the kernel's). The actual value is architecture and platform dependent. Values: integer
What: /sys/devices/system/cpu/cpuX/topology/cluster_id Description: the cluster ID of cpuX. Typically it is the hardware platform's identifier (rather than the kernel's). The actual value is architecture and platform dependent. Values: integer
What: /sys/devices/system/cpu/cpuX/topology/book_id Description: the book ID of cpuX. Typically it is the hardware platform's identifier (rather than the kernel's). The actual value is architecture and platform dependent. it's only used on s390. Values: integer
What: /sys/devices/system/cpu/cpuX/topology/drawer_id Description: the drawer ID of cpuX. Typically it is the hardware platform's identifier (rather than the kernel's). The actual value is architecture and platform dependent. it's only used on s390. Values: integer
What: /sys/devices/system/cpu/cpuX/topology/core_cpus Description: internal kernel map of CPUs within the same core. (deprecated name: "thread_siblings") Values: hexadecimal bitmask.
What: /sys/devices/system/cpu/cpuX/topology/core_cpus_list Description: human-readable list of CPUs within the same core. The format is like 0-3, 8-11, 14,17. (deprecated name: "thread_siblings_list"). Values: decimal list.
What: /sys/devices/system/cpu/cpuX/topology/package_cpus Description: internal kernel map of the CPUs sharing the same physical_package_id. (deprecated name: "core_siblings"). Values: hexadecimal bitmask.
What: /sys/devices/system/cpu/cpuX/topology/package_cpus_list Description: human-readable list of CPUs sharing the same physical_package_id. The format is like 0-3, 8-11, 14,17. (deprecated name: "core_siblings_list") Values: decimal list.
What: /sys/devices/system/cpu/cpuX/topology/die_cpus Description: internal kernel map of CPUs within the same die. Values: hexadecimal bitmask.
What: /sys/devices/system/cpu/cpuX/topology/ppin Description: per-socket protected processor inventory number Values: hexadecimal.
What: /sys/devices/system/cpu/cpuX/topology/die_cpus_list Description: human-readable list of CPUs within the same die. The format is like 0-3, 8-11, 14,17. Values: decimal list.
What: /sys/devices/system/cpu/cpuX/topology/cluster_cpus Description: internal kernel map of CPUs within the same cluster. Values: hexadecimal bitmask.
What: /sys/devices/system/cpu/cpuX/topology/cluster_cpus_list Description: human-readable list of CPUs within the same cluster. The format is like 0-3, 8-11, 14,17. Values: decimal list.
What: /sys/devices/system/cpu/cpuX/topology/book_siblings Description: internal kernel map of cpuX's hardware threads within the same book_id. it's only used on s390. Values: hexadecimal bitmask.
What: /sys/devices/system/cpu/cpuX/topology/book_siblings_list Description: human-readable list of cpuX's hardware threads within the same book_id. The format is like 0-3, 8-11, 14,17. it's only used on s390. Values: decimal list.
What: /sys/devices/system/cpu/cpuX/topology/drawer_siblings Description: internal kernel map of cpuX's hardware threads within the same drawer_id. it's only used on s390. Values: hexadecimal bitmask.
What: /sys/devices/system/cpu/cpuX/topology/drawer_siblings_list Description: human-readable list of cpuX's hardware threads within the same drawer_id. The format is like 0-3, 8-11, 14,17. it's only used on s390. Values: decimal list.