diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-devices-system-cpu | 23 | ||||
| -rw-r--r-- | Documentation/cputopology.txt | 48 | ||||
| -rw-r--r-- | Documentation/process/changes.rst | 6 | ||||
| -rw-r--r-- | Documentation/x86/topology.rst | 4 |
4 files changed, 62 insertions, 19 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu index 1528239f69b2..923fe2001472 100644 --- a/Documentation/ABI/testing/sysfs-devices-system-cpu +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu @@ -538,3 +538,26 @@ Description: Intel Energy and Performance Bias Hint (EPB) This attribute is present for all online CPUs supporting the Intel EPB feature. + +What: /sys/devices/system/cpu/umwait_control + /sys/devices/system/cpu/umwait_control/enable_c02 + /sys/devices/system/cpu/umwait_control/max_time +Date: May 2019 +Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org> +Description: Umwait control + + enable_c02: Read/write interface to control umwait C0.2 state + Read returns C0.2 state status: + 0: C0.2 is disabled + 1: C0.2 is enabled + + Write 'y' or '1' or 'on' to enable C0.2 state. + Write 'n' or '0' or 'off' to disable C0.2 state. + + The interface is case insensitive. + + max_time: Read/write interface to control umwait maximum time + in TSC-quanta that the CPU can reside in either C0.1 + or C0.2 state. The time is an unsigned 32-bit number. + Note that a value of zero means there is no limit. + Low order two bits must be zero. diff --git a/Documentation/cputopology.txt b/Documentation/cputopology.txt index cb61277e2308..b90dafcc8237 100644 --- a/Documentation/cputopology.txt +++ b/Documentation/cputopology.txt @@ -12,6 +12,12 @@ physical_package_id: socket number, but the actual value is architecture and platform dependent. +die_id: + + 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. + core_id: the CPU core ID of cpuX. Typically it is the hardware platform's @@ -30,25 +36,33 @@ drawer_id: identifier (rather than the kernel's). The actual value is architecture and platform dependent. -thread_siblings: +core_cpus: - internal kernel map of cpuX's hardware threads within the same - core as cpuX. + internal kernel map of CPUs within the same core. + (deprecated name: "thread_siblings") -thread_siblings_list: +core_cpus_list: - human-readable list of cpuX's hardware threads within the same - core as cpuX. + human-readable list of CPUs within the same core. + (deprecated name: "thread_siblings_list"); -core_siblings: +package_cpus: - internal kernel map of cpuX's hardware threads within the same - physical_package_id. + internal kernel map of the CPUs sharing the same physical_package_id. + (deprecated name: "core_siblings") -core_siblings_list: +package_cpus_list: - human-readable list of cpuX's hardware threads within the same - physical_package_id. + human-readable list of CPUs sharing the same physical_package_id. + (deprecated name: "core_siblings_list") + +die_cpus: + + internal kernel map of CPUs within the same die. + +die_cpus_list: + + human-readable list of CPUs within the same die. book_siblings: @@ -81,11 +95,13 @@ For an architecture to support this feature, it must define some of these macros in include/asm-XXX/topology.h:: #define topology_physical_package_id(cpu) + #define topology_die_id(cpu) #define topology_core_id(cpu) #define topology_book_id(cpu) #define topology_drawer_id(cpu) #define topology_sibling_cpumask(cpu) #define topology_core_cpumask(cpu) + #define topology_die_cpumask(cpu) #define topology_book_cpumask(cpu) #define topology_drawer_cpumask(cpu) @@ -99,9 +115,11 @@ provides default definitions for any of the above macros that are not defined by include/asm-XXX/topology.h: 1) topology_physical_package_id: -1 -2) topology_core_id: 0 -3) topology_sibling_cpumask: just the given CPU -4) topology_core_cpumask: just the given CPU +2) topology_die_id: -1 +3) topology_core_id: 0 +4) topology_sibling_cpumask: just the given CPU +5) topology_core_cpumask: just the given CPU +6) topology_die_cpumask: just the given CPU For architectures that don't support books (CONFIG_SCHED_BOOK) there are no default definitions for topology_book_id() and topology_book_cpumask(). diff --git a/Documentation/process/changes.rst b/Documentation/process/changes.rst index 18735dc460a0..0a18075c485e 100644 --- a/Documentation/process/changes.rst +++ b/Documentation/process/changes.rst @@ -31,7 +31,7 @@ you probably needn't concern yourself with isdn4k-utils. ====================== =============== ======================================== GNU C 4.6 gcc --version GNU make 3.81 make --version -binutils 2.20 ld -v +binutils 2.21 ld -v flex 2.5.35 flex --version bison 2.0 bison --version util-linux 2.10o fdformat --version @@ -77,9 +77,7 @@ You will need GNU make 3.81 or later to build the kernel. Binutils -------- -The build system has, as of 4.13, switched to using thin archives (`ar T`) -rather than incremental linking (`ld -r`) for built-in.a intermediate steps. -This requires binutils 2.20 or newer. +Binutils 2.21 or newer is needed to build the kernel. pkg-config ---------- diff --git a/Documentation/x86/topology.rst b/Documentation/x86/topology.rst index 6e28dbe818ab..8e9704f61017 100644 --- a/Documentation/x86/topology.rst +++ b/Documentation/x86/topology.rst @@ -49,6 +49,10 @@ Package-related topology information in the kernel: The number of cores in a package. This information is retrieved via CPUID. + - cpuinfo_x86.x86_max_dies: + + The number of dies in a package. This information is retrieved via CPUID. + - cpuinfo_x86.phys_proc_id: The physical ID of the package. This information is retrieved via CPUID |