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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
128 lines
5.7 KiB
Plaintext
128 lines
5.7 KiB
Plaintext
What: /sys/devices/system/cpu/dscr_default
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Date: 13-May-2014
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KernelVersion: v3.15.0
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Contact:
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Description: Writes are equivalent to writing to
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/sys/devices/system/cpu/cpuN/dscr on all CPUs.
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Reads return the last written value or 0.
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This value is not a global default: it is a way to set
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all per-CPU defaults at the same time.
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Values: 64 bit unsigned integer (bit field)
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What: /sys/devices/system/cpu/cpu[0-9]+/dscr
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Date: 13-May-2014
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KernelVersion: v3.15.0
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Contact:
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Description: Default value for the Data Stream Control Register (DSCR) on
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a CPU.
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This default value is used when the kernel is executing and
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for any process that has not set the DSCR itself.
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If a process ever sets the DSCR (via direct access to the
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SPR) that value will be persisted for that process and used
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on any CPU where it executes (overriding the value described
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here).
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If set by a process it will be inherited by child processes.
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Values: 64 bit unsigned integer (bit field)
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What: /sys/devices/system/cpu/cpuX/topology/physical_package_id
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Description: physical package id of cpuX. Typically corresponds to a physical
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socket number, but the actual value is architecture and platform
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dependent.
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Values: integer
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What: /sys/devices/system/cpu/cpuX/topology/die_id
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Description: the CPU die ID of cpuX. Typically it is the hardware platform's
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identifier (rather than the kernel's). The actual value is
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architecture and platform dependent.
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Values: integer
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What: /sys/devices/system/cpu/cpuX/topology/core_id
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Description: the CPU core ID of cpuX. Typically it is the hardware platform's
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identifier (rather than the kernel's). The actual value is
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architecture and platform dependent.
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Values: integer
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What: /sys/devices/system/cpu/cpuX/topology/cluster_id
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Description: the cluster ID of cpuX. Typically it is the hardware platform's
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identifier (rather than the kernel's). The actual value is
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architecture and platform dependent.
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Values: integer
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What: /sys/devices/system/cpu/cpuX/topology/book_id
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Description: the book ID of cpuX. Typically it is the hardware platform's
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identifier (rather than the kernel's). The actual value is
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architecture and platform dependent. it's only used on s390.
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Values: integer
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What: /sys/devices/system/cpu/cpuX/topology/drawer_id
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Description: the drawer ID of cpuX. Typically it is the hardware platform's
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identifier (rather than the kernel's). The actual value is
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architecture and platform dependent. it's only used on s390.
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Values: integer
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What: /sys/devices/system/cpu/cpuX/topology/core_cpus
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Description: internal kernel map of CPUs within the same core.
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(deprecated name: "thread_siblings")
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Values: hexadecimal bitmask.
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What: /sys/devices/system/cpu/cpuX/topology/core_cpus_list
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Description: human-readable list of CPUs within the same core.
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The format is like 0-3, 8-11, 14,17.
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(deprecated name: "thread_siblings_list").
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Values: decimal list.
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What: /sys/devices/system/cpu/cpuX/topology/package_cpus
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Description: internal kernel map of the CPUs sharing the same physical_package_id.
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(deprecated name: "core_siblings").
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Values: hexadecimal bitmask.
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What: /sys/devices/system/cpu/cpuX/topology/package_cpus_list
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Description: human-readable list of CPUs sharing the same physical_package_id.
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The format is like 0-3, 8-11, 14,17.
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(deprecated name: "core_siblings_list")
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Values: decimal list.
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What: /sys/devices/system/cpu/cpuX/topology/die_cpus
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Description: internal kernel map of CPUs within the same die.
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Values: hexadecimal bitmask.
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What: /sys/devices/system/cpu/cpuX/topology/ppin
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Description: per-socket protected processor inventory number
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Values: hexadecimal.
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What: /sys/devices/system/cpu/cpuX/topology/die_cpus_list
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Description: human-readable list of CPUs within the same die.
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The format is like 0-3, 8-11, 14,17.
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Values: decimal list.
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What: /sys/devices/system/cpu/cpuX/topology/cluster_cpus
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Description: internal kernel map of CPUs within the same cluster.
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Values: hexadecimal bitmask.
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What: /sys/devices/system/cpu/cpuX/topology/cluster_cpus_list
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Description: human-readable list of CPUs within the same cluster.
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The format is like 0-3, 8-11, 14,17.
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Values: decimal list.
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What: /sys/devices/system/cpu/cpuX/topology/book_siblings
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Description: internal kernel map of cpuX's hardware threads within the same
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book_id. it's only used on s390.
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Values: hexadecimal bitmask.
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What: /sys/devices/system/cpu/cpuX/topology/book_siblings_list
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Description: human-readable list of cpuX's hardware threads within the same
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book_id.
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The format is like 0-3, 8-11, 14,17. it's only used on s390.
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Values: decimal list.
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What: /sys/devices/system/cpu/cpuX/topology/drawer_siblings
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Description: internal kernel map of cpuX's hardware threads within the same
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drawer_id. it's only used on s390.
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Values: hexadecimal bitmask.
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What: /sys/devices/system/cpu/cpuX/topology/drawer_siblings_list
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Description: human-readable list of cpuX's hardware threads within the same
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drawer_id.
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The format is like 0-3, 8-11, 14,17. it's only used on s390.
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Values: decimal list.
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