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authorLen Brown <len.brown@intel.com>2019-05-13 20:58:45 +0300
committerThomas Gleixner <tglx@linutronix.de>2019-05-23 11:08:30 +0300
commit7745f03eb39587dd15a1fb26e6223678b8e906d2 (patch)
tree77b80b9f708902fe88699b05a3da830cb70b0c91 /Documentation/x86
parenta188339ca5a396acc588e5851ed7e19f66b0ebd9 (diff)
downloadlinux-7745f03eb39587dd15a1fb26e6223678b8e906d2.tar.xz
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.rst4
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