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| author | Len Brown <len.brown@intel.com> | 2019-05-13 13:58:45 -0400 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-05-23 10:08:30 +0200 |
| commit | 7745f03eb39587dd15a1fb26e6223678b8e906d2 (patch) | |
| tree | 77b80b9f708902fe88699b05a3da830cb70b0c91 /Documentation/x86 | |
| parent | a188339ca5a396acc588e5851ed7e19f66b0ebd9 (diff) | |
| download | linux-7745f03eb39587dd15a1fb26e6223678b8e906d2.tar.gz linux-7745f03eb39587dd15a1fb26e6223678b8e906d2.tar.bz2 linux-7745f03eb39587dd15a1fb26e6223678b8e906d2.zip | |
x86/topology: Add CPUID.1F multi-die/package support
Some new systems have multiple software-visible die within each package.
Update Linux parsing of the Intel CPUID "Extended Topology Leaf" to handle
either CPUID.B, or the new CPUID.1F.
Add cpuinfo_x86.die_id and cpuinfo_x86.max_dies to store the result.
die_id will be non-zero only for multi-die/package systems.
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: linux-doc@vger.kernel.org
Link: https://lkml.kernel.org/r/7b23d2d26d717b8e14ba137c94b70943f1ae4b5c.1557769318.git.len.brown@intel.com
Diffstat (limited to 'Documentation/x86')
| -rw-r--r-- | Documentation/x86/topology.rst | 4 |
1 files changed, 4 insertions, 0 deletions
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 |