AMD systems provide a "NodeId" value that represents a global ID
indicating to which "Node" a logical CPU belongs. The "Node" is a
physical structure equivalent to a Die, and it should not be confused
with logical structures like NUMA nodes. Logical nodes can be adjusted
based on firmware or other settings whereas the physical nodes/dies are
fixed based on hardware topology.
The NodeId value can be used when a physical ID is needed by software.
Save the AMD NodeId to struct cpuinfo_x86.cpu_die_id. Use the value
from CPUID or MSR as appropriate. Default to phys_proc_id otherwise.
Do so for both AMD and Hygon systems.
Drop the node_id parameter from cacheinfo_*_init_llc_id() as it is no
longer needed.
Update the x86 topology documentation.
Suggested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20201109210659.754018-2-Yazen.Ghannam@amd.com
There are lots of documents that belong to the admin-guide but
are on random places (most under Documentation root dir).
Move them to the admin guide.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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
conversion of the x86 docs to RST, which has been in the works for some
time but needed a couple of final tweaks.
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Merge tag 'docs-5.2a' of git://git.lwn.net/linux
Pull more documentation updates from Jonathan Corbet:
"Some late arriving documentation changes. In particular, this contains
the conversion of the x86 docs to RST, which has been in the works for
some time but needed a couple of final tweaks"
* tag 'docs-5.2a' of git://git.lwn.net/linux: (29 commits)
Documentation: x86: convert x86_64/machinecheck to reST
Documentation: x86: convert x86_64/cpu-hotplug-spec to reST
Documentation: x86: convert x86_64/fake-numa-for-cpusets to reST
Documentation: x86: convert x86_64/5level-paging.txt to reST
Documentation: x86: convert x86_64/mm.txt to reST
Documentation: x86: convert x86_64/uefi.txt to reST
Documentation: x86: convert x86_64/boot-options.txt to reST
Documentation: x86: convert i386/IO-APIC.txt to reST
Documentation: x86: convert usb-legacy-support.txt to reST
Documentation: x86: convert orc-unwinder.txt to reST
Documentation: x86: convert resctrl_ui.txt to reST
Documentation: x86: convert microcode.txt to reST
Documentation: x86: convert pti.txt to reST
Documentation: x86: convert amd-memory-encryption.txt to reST
Documentation: x86: convert intel_mpx.txt to reST
Documentation: x86: convert protection-keys.txt to reST
Documentation: x86: convert pat.txt to reST
Documentation: x86: convert mtrr.txt to reST
Documentation: x86: convert tlb.txt to reST
Documentation: x86: convert zero-page.txt to reST
...
This converts the plain text documentation to reStructuredText format and
add it to Sphinx TOC tree. No essential content change.
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Yazen Ghannam